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News and Outreach: Kerry Emanuel

National Journal
In The Media
National Journal
May 9, 2013
The Coming GOP Civil War Over Climate Change

By Coral Davenport

Kerry Emanuel registered as a Republican as soon he turned 18, in 1973. The aspiring scientist was turned off by what he saw as the Left’s blind ideology. “I had friends who denied Pol Pot was killing people in Cambodia,” he says. “I reacted very badly to the triumph of ideology over reason.”

Back then, Emanuel saw the Republican Party as the political fit for a data-driven scientist. Today, the professor of atmospheric science at the Massachusetts Institute of Technology is considered one of the United States’ foremost authorities on climate change—particularly on how rising carbon pollution will increase the intensity of hurricanes.

In January 2012, just before South Carolina’s Republican presidential primary, the Charleston-based Christian Coalition of America, one of the most influential advocacy groups in conservative politics, flew Emanuel down to meet with the GOP presidential candidates. Perhaps an unlikely prophet of doom where global warming is concerned, the coalition has begun to push Republicans to take action on climate change, out of worry that coming catastrophes could hit the next generation hard, especially the world’s poor.

The meetings didn’t take. “[Newt] Gingrich and [Mitt] Romney understood, … and I think they even believed the evidence and understood the risk,” Emanuel says. “But they were so terrified by the extremists in their party that in the primaries they felt compelled to deny it. Which is not good leadership, good integrity. I got a low impression of them as leaders.” Throughout the Republican presidential primaries, every candidate but one—former Utah Gov. Jon Huntsman, who was knocked out of the race at the start—questioned, denied, or outright mocked the science of climate change.

Soon after his experience in South Carolina, Emanuel changed his lifelong Republican Party registration to independent. “The idea that you could look a huge amount of evidence straight in the face and, for purely ideological reasons, deny it, is anathema to me,” he says.

Emanuel predicts that many more voters like him, people who think of themselves as conservative or independent but are turned off by what they see as a willful denial of science and facts, will also abandon the GOP, unless the party comes to an honest reckoning about global warming.

And a quiet, but growing, number of other Republicans fear the same thing. Already, deep fissures are emerging between, on one side, a base of ideological voters and lawmakers with strong ties to powerful tea-party groups and super PACs funded by the fossil-fuel industry who see climate change as a false threat concocted by liberals to justify greater government control; and on the other side, a quiet group of moderates, younger voters, and leading conservative intellectuals who fear that if Republicans continue to dismiss or deny climate change, the party will become irrelevant.

“There is a divide within the party,” says Samuel Thernstrom, who served on President George W. Bush’s Council on Environmental Quality and is now a scholar of environmental policy at the American Enterprise Institute, a conservative think tank. “The position that climate change is a hoax is untenable.”

A concerted push has begun within the party—in conservative think tanks and grassroots groups, and even in backroom, off-the-record conversations on Capitol Hill—to persuade Republicans to acknowledge and address climate change in their own terms. The effort will surely add heat to the deep internal conflict in the years ahead.

Republicans have been struggling with an identity crisis since the 2012 presidential election. In particular, the nation’s rapid demographic changes are forcing the GOP to come to terms with the newly powerful influence of Hispanic voters and to confront the issue of immigration. For now, climate change isn’t getting anywhere close to that kind of urgent scrutiny from Republicans, at least not in public. GOP strategists say that Republican candidates hoping to win primary races, where the electorate tends to be older and more ideologically driven, are still best served to deny, ignore, or dismiss climate change.

Today, a Republican candidate “wouldn’t be able to win a primary with a Jon Huntsman position on this,” says strategist Glen Bolger.

The problem is, as polling data and the changing demographics of the American electorate show, it’s likely that the position that can win voters in a primary will lose voters in a general election. Some day, though, the facts—both scientific and demographic—will force GOP candidates to confront climate change whether they want to or not. And that day will come sooner than they think.

Already, the numbers tell the story. Polls show that a majority of Americans, and a plurality of Republicans, believe global warming is a problem. Concern about the issue is higher among younger voters and independents, who Republicans will need to attract if they want to win elections.

According to a pair of Gallup Polls in April, 58 percent of all Americans are worried about global warming, and 57 percent believe it is caused by human activities. Not surprisingly, responses reflect a partisan divide on the issue, but among Republicans, concern about global warming is rising. Gallup found that 75 percent of Democrats worry about climate change, compared with 59 percent of independent voters (up from 51 percent in 2010) and 40 percent of Republicans (up from 32 percent from that year).

A January poll of Republicans and Republican-leading independents conducted by George Mason University’s Center for Climate Change Communication said that a majority (52 percent) think climate change is happening; 62 percent favor taking action to combat climate change, such as taxing carbon pollution. Only 35 percent of the Republican respondents said they agree with the Republican Party’s position on climate change. (The party’s 2012 platform opposed any limits on greenhouse-gas emissions and suggested the science underlying projections of a warming climate is “uncertain.”)

Meanwhile, a March poll by the Pew Research Center for the People and the Press found that 69 percent of Americans believe the climate is already changing. On the more contentious question of whether fossil-fuel pollution is causing that change, the poll uncovered a generation gap: Only 28 percent of voters over age 65 accept the scientific consensus that such emissions are warming the Earth, while close to 50 percent of those under 50 accept it.

“These polls show that there are a lot of people who are inclined to vote Republican—and believe America should respond to climate change,” says Edward Maibach, director of the George Mason program. “Republicans aren’t inclined to respond to it right now, but in the future, if they don’t take these issues seriously, they’re inclined to alienate a lot of Republican voters.”

CHRISTIAN SOLDIERS

Mother and daughter Roberta and Michele Combs are pillars of the Religious Right. Roberta, president and CEO of the Christian Coalition America, got her start in Republican politics working with celebrated strategist Lee Atwater. Michele, who was named Young Republican of the Year in 1989 and worked as a planner for events such as George W. Bush’s inauguration, is the coalition’s communications director. With their white-blond bouffant hair, penchant for fuchsia lipstick, soft South Carolina accents, and sterling conservative bona fides, the Combses are familiar presences in the ruby-red heart of the GOP establishment.

That’s why it’s so surprising to many that they are tackling climate change. But both women see global warming, and clean air and environmental protection more broadly, as issues that tie into their core conservative mission of protecting family values.

“This is an important issue for the Republican Party,” Roberta Combs says. “At one point in time, this was a Republican issue, but Democrats took it over.”

In 2010, Roberta led a Christian Coalition push for her friend Sen. Lindsey Graham of South Carolina to sign on to a Senate climate-change bill, as the measure’s sole GOP sponsor. Graham eventually pulled his support, but thanks in part to Roberta’s pressure, he’s remained one of the few Republicans to openly acknowledge climate change and to call on his party to look for a solution. He is sticking with his position even as he prepares to face South Carolina voters for reelection next year. 

“I think the Republican Party needs to embrace an environmental agenda,” Graham says. “When you ask a Republican candidate for president, what’s your environmental platform, what do they say? We need to be able to speak to this just as quickly as to do to reforming the tax code. Younger people, people under 30, this is a huge issue for them.”

Roberta was the Christian Coalition official who persuaded Emanuel, the MIT scientist, to speak with the GOP presidential candidates in January 2012. And she continues to employ her group’s grassroots muscle to muster conservative support for Republicans like Graham who support action to combat climate change, with the hope that eventually one will sponsor a bill that can pass.

“I think the Republican Party has got to move to the center. We should never leave our base, but we’ve got to be more open-minded and look at issues more American families care about,” Roberta says. “As the electorate changes, we’re not going to win as much. It’s a different generation, and the Republican Party has got to look at all of this and broaden its agenda if they want to continue to win elections.”

Last summer, Michele launched a new group, Young Conservatives for Energy Reform, aimed at amassing grassroots support for lawmakers and legislation addressing clean energy and climate change. She is channeling her network of connections among the Christian Coalition and the Young Republicans.  

She works closely with Brian Smith, a 32-year-old Air Force veteran and the chairman of the Midwest chapter, who is also a former cochairman of the Young Republicans National Federation, a training ground for party leaders founded in 1931. The energy group is structured like the Young Republicans, with volunteers staffing city, state, and regional chapters. So far, the group has state chairs in Florida, Georgia, Indiana, New Hampshire, Ohio, South Carolina, and Texas—all of which have Republican governors.

Over the past year, the group has held a dozen events in those and other states. In October 2012, it sponsored a get-together in Washington for GOP congressional staff. The gatherings—mostly of young professionals in their 20s, 30s, and 40s—feature hors d’oeuvres, cocktails, and a talk from retired Marine Gen. Richard Zilmer, who makes the case that both climate change and U.S. oil dependence are matters of national security, and that policies to cut fossil-fuel use are consistent with conservative values. Emanuel has also spoken at some of the events.

The goal, Michele says, is to build a database of voters who will, at some point, come forward to back Republican candidates who support cutting carbon pollution. “We are building a grassroots army of young conservatives around the country,” she says. “When the time comes, we’ll have the grassroots to organize around candidates or legislation, and we can activate them.”

PAYING THE PRICE

What Michele and Roberta want to do, in other words, is protect lawmakers such as Bob Inglis. Today, Republicans point to the former House member from South Carolina as the textbook tale of what happens when a red-state conservative dares to acknowledge climate change. 

Inglis, who left Congress in 2011, recalls the challenge his son, Rob, threw down to him a decade ago before he was to vote in his first election. He said, “I’ll vote for you, Dad, but you’ve got to clean up your act on the environment.’ ”

Inglis had never given much thought to the issue of climate change. As a by-the-books conservative, he says, “I accepted that if Al Gore was for it, I was against it, until my son challenged my ignorance on the subject.” Inglis spent the next few years educating himself on climate issues. He joined the House Science Committee and accompanied climate scientists on research trips to Antarctica and the Great Barrier Reef, where he saw firsthand the damages wrought by rising carbon pollution and warming temperatures. “I got convinced of the science,” he says, and, in 2009, Inglis cosponsored climate-change legislation with Republican Rep. Jeff Flake of Arizona. The bill proposed an idea that had strong backing from environmentalists, including Gore, as well as prominent conservative economists. It would create a tax on carbon pollution but use the revenue to cut payroll or income taxes.

Inglis would pay dearly for his support of the so-called carbon-tax swap. The following year, he lost his primary election to a tea-party candidate, Trey Gowdy. And Inglis knows his position on the climate was the reason. “The most enduring heresy was saying, ‘Climate change is real and we should do something about it.’ That was seen as a statement against the tribal orthodoxy.”

“But,” he says, “these heresies and orthodoxies change so quickly. Back in 2010, I was voting for immigration reform; look how that’s changed. It’s going to be like that with climate change.”

Along with the evolving politics of immigration reform, Bob and Rob Inglis also see in their situation a kinship with Sen. Rob Portman of Ohio, who jolted the party earlier this year when he came out in support of gay marriage. Portman changed his stance after conversations with his 21-year-old son, Will, who is gay.

“I hope there’s a parallel,” Bob Inglis says. “Rob [Portman] is a hero of mine. He loves his son. He’s willing to take risks for his son.” Unlike Inglis, Portman hasn’t yet had to face voters in a primary—and won’t until 2016. Given the rapid shift in public attitudes toward gay marriage, he may in fact suffer no repercussions. It wasn’t long ago that gay marriage served as a valuable wedge issue for the party (think George W. Bush in 2004)—much like placing limits on carbon is today. 

For the moment, however, Inglis has taken on the arduous task of bringing his party back to him. Last summer, he founded the Energy and Enterprise Initiative, a nonprofit organization based at George Mason University, focused on convincing conservatives, particularly young ones, that climate change, caused by carbon pollution, is a serious threat—and on pushing for the carbon-tax swap as a fundamentally conservative economic solution. Since last fall, Inglis and a cohort of conservative economists have made their case at a dozen events, including talks at colleges and universities in Florida, Illinois, Kansas, Kentucky, and Mississippi.

Last month, 21-year-old Republican Kevin Croswhite, a senior at Carthage College in Kenosha, Wis., who grew up in nearby Salem (both towns lie within in the district of Rep. Paul Ryan, the 2012 GOP vice presidential candidate) attended one of Inglis’s events—and was sold.

Croswhite has considered himself a conservative Republican since high school. As an economics major, he is a big believer in data: scientific, economic, and demographic. He is persuaded that his party’s rejection of the data on climate change will damage it politically.

“The country’s going to become more educated, and that’s not going to break our way, as a party, if we are denying what 90 out of 100 scientists say,” Croswhite argues. “If the scientific community is generally accepting of something, you need to trust that.”

While Combs’s and Inglis’s groups try to appeal to conservative Christians and young Republicans, another organization—the National Audubon Society—is reaching out to red-state conservatives in the West, linking the threat of climate change to the ideal of Theodore Roosevelt’s Republican conservatism, in a bid to appeal to hunters, fishers, ranchers, and other lovers of the outdoors. The venerable nonpartisan group has teamed with the Washington organization ConservAmerica to ask red-state voters to sign an “American Eagle Compact” calling for lawmakers to act on conservation policies, including climate change. The effort, which Audubon says is funded by a Texas Republican who has asked to remain anonymous, has so far garnered 55,000 signatures. 

“We’re trying to figure out how to partner with those people, so they can turn out in communities across the country, to activate them for support,” says Audubon President and CEO David Yarnold. “We want to make sure that when Republican legislators who support conservation and climate policy go home, they’re not just getting hollered at. We want to make sure they’re hearing from reasonable conservationists who say this is not a partisan issue.”

LIGHTING THE WAY

While those groups work from the bottom up to help push Washington to move on climate issues, a constellation of prominent conservative economists is bolstering the cause. These conservatives include such intellectuals as Art Laffer, the former senior adviser to President Reagan; George Shultz, Reagan’s secretary of State; Gregory Mankiw, who was an economic adviser to the Romney campaign and the former chief economist for George W. Bush’s Council of Economic Advisers; Douglas Holtz-Eakin, the president of the influential conservative think tank American Action Forum, a former head of Bush’s Council on Economic Advisers, and an economic adviser to Sen. John McCain’s 2008 presidential campaign; and a host of other well-respected conservative economic thinkers.

Laffer spoke to National Journal by phone from his home in Tennessee, where he lives next door to Gore. The Reagan economist and the liberal global-warming crusader disagree on many issues but are united on the wisdom of a carbon-tax swap as good environmental and economic policy. “Al is a dear friend, and I think he’s a damned good public servant,” Laffer says. “I am ignorant-squared on climate change, but what I do believe is that the risks of reducing carbon in the environment are less than the risks of putting more carbon into the environment.”

Last year, Laffer wrote a detailed paper on how best to structure a carbon-tax swap, presumably as part of the broader tax-reform effort Congress appears to be moving toward. “What I believe in, and Al Gore believes in, is if you’re going to do a carbon tax, you need to offset it dollar-for-dollar with marginal tax reduction on income or employment,” he says. “Anyone who goes through what I just went through, they’ll agree with me. I’ve had more experience than anyone in the financial thinking on this.”

At the beginning of this Congress, a group of Republican lawmakers, along with a few coal-state Democrats, sponsored a measure that vowed they would never back a carbon tax, and given the antitax mood in Washington, prospects for such a tax appear dim. Still, both opponents and proponents concede that the idea will certainly be on the table if Congress makes a serious attempt at tax reform in the coming years.

Laffer said that as with so many of the policies he’s proposed before, the time will ripen for a carbon tax as it moves from impossible to inevitable. “My policies are always the North Star,” he says. “Right now, this is viewed as a third-order problem. But if we take over in 2016, this will have huge traction.”

Laffer spent last year promoting the idea on college campuses. The climate-change advocacy group Clean Air-Cool Planet flew Holtz-Eakin to New Hampshire to participate in living-room chats with voters about the economic costs of climate change and the economic benefits of addressing the problem.

In March, Schultz went to Capitol Hill to talk about climate change and push the carbon tax to congressional aides. In a standing-room-only gathering in the Rayburn House Office Building, he argued, “Good work on conservation and the environment is in the Republican genes; we’ve been the guys who did it.… My proposal is to have a revenue-neutral carbon tax.” Schultz got a standing ovation. Among the audience were staffers from the offices of Republican Reps. Phil Roe of Tennessee, Billy Long of Missouri, and Randy Neugebauer of Texas—ranked as the most conservative member of the House in a 2011 NJ survey.

A SLEEPING GIANT

It’s long been taken as a truism that the powerful oil lobby is the reason nothing happens on climate change in Washington. For many years, that was indeed true. In particular, Exxon Mobil, the nation’s largest oil company and a major contributor to Republican candidates, was associated with a campaign to fuel skepticism about climate science. From 1998 to 2006, Exxon Mobil contributed more than $600,000 to the Heartland Institute, a well-known nonprofit group that holds conferences and publishes books aimed at debunking the science of climate change. Exxon Mobil’s support of Heartland made sense. The oil company stood to take a financial hit from “cap-and-trade” climate-change proposals that would have priced carbon pollution from oil.

For a number of reasons, that equation is changing. Exxon Mobil has ended its support of Heartland’s agenda. It’s not that the oil giant has had a green awakening; it’s just that a series of internal changes have positioned the company to profit from at least some policies that price carbon emissions.

In 2010, Exxon Mobil bought the natural-gas company XTO Energy, which transformed the venerable oil producer into the world’s largest natural-gas producer. Around the same time, the company began making a noticeable shift in its climate policy. The reason: Natural gas, which is used to generate electricity, is the lowest-polluting fossil fuel, emitting just half of the greenhouse gases as coal, the world’s top electricity source. In the event of a tax on carbon pollution, demand for coal-fired electricity would freeze, while markets for natural gas would explode.

Every year, Exxon Mobil puts out a widely read report with projections on the global state of energy development. The most recent one included the assumption of a future price on carbon and a corresponding surge in natural-gas consumption. “We assume there’s going to be a price on carbon in the future, and that assumption drives our investment strategy,” says company spokesman Alan Jeffers.

And the position on climate change at Exxon Mobil that once helped fund the Heartland conferences? “We have the same concerns about climate change as everyone. The risk of climate change exists; it’s caused by more carbon in the atmosphere; the risk is growing; and there’s broad scientific and policy consensus on this,” Jeffers says.

In 2010, during Senate negotiations on the cap-and-trade bill, Exxon Mobil told the White House that it wouldn’t back that bill, but it would support legislation with a straight carbon tax, ideally, a carbon-tax swap along the lines of what Inglis and Laffer propose. Ultimately, of course, all of those attempts failed. And, today, Exxon Mobil is not actively lobbying for the tax. The company’s position remains the same, though, Jeffers says. “Our approach has been, if public policymakers have decided they want to put a price on carbon, we see a revenue-neutral carbon tax as the most efficient way to do that.”

In the 2012 campaign, Exxon Mobil gave $2.7 million in political contributions, with 88 percent going to Republicans. One of the world’s biggest and most profitable oil companies—a lobbying powerhouse and major influence in GOP politics, particularly in deep-red oil states—has accepted the science of climate change and figured out how to profit from a carbon-price policy. While Exxon Mobil won’t be leading the green revolution, its shift could make a difference in the way many Republicans approach the issue.

HEADING FOR THE HILLS

For now, however, no prominent Republican running for office in the next few years will want to get anywhere near a carbon-tax proposal, or even talk about climate change. While the rift in the party over global warming is becoming increasingly evident, most Republicans feel much more secure on the side that denies the problem.

That was made abundantly plain during the Conservative Political Action Conference in March, the annual Washington gathering that the GOP base uses to anoint its future leaders. Two leading speakers this year were Sen. Marco Rubio and former Gov. Jeb Bush, both of Florida, the state that scientists such as Kerry Emanuel warn is the most vulnerable to devastation from intensified hurricanes in the coming years.

Rubio was the undisputed star attraction, and his keynote speech sparked some of the loudest cheers when he denounced climate science in the context of condemning abortion.

“The people who are actually closed-minded in American politics are the people who love to preach about the certainty of science with regards to our climate but ignore the absolute fact that science has proven that life begins at conception,” Rubio said. A month earlier, in his response to President Obama’s State of the Union, Rubio had said, “When we point out that no matter how many job-killing laws we pass, our government can’t control the weather, [Obama] accuses us of wanting dirty water and dirty air.”

Bush’s CPAC speech had a decidedly different tone. He castigated his party for espousing hard-right views. “Way too many people believe Republicans are anti-immigrant, antiwoman, antiscience, antigay, anti-worker … and the list goes on,” he said. “Many voters are simply unwilling to choose our candidates, because those voters feel unloved, unwanted, and unwelcome in our party.”

Bush did not specifically mention climate change, although many on both sides of the aisle interpreted his remark about science as a signal that he’d be open to addressing the issue. Pundits praised the speech, but it was not a hit with his party. Bush spoke to a quiet room with a fair number of empty seats. Many in the audience members were checking their mobile devices. When he finished, Bush was met with a polite, modest smattering of applause. (Another Republican who has signaled support for climate-change legislation, New Jersey Gov. Chris Christie, wasn’t even invited to CPAC.)

At 41, Rubio personifies the next generation of Republican leadership, while Bush represents an older, perhaps out-of-date moderate mind-set—which means the party may very well be heading in the wrong direction when it comes to embracing climate science. Rubio’s view is likely to remain the mainstream one in the party in the short term, thanks to tea-party groups such as Americans for Prosperity, a super PAC founded by David and Charles Koch, the principal owners of Koch Industries, a major U.S. oil conglomerate.

Over the last several years, Americans for Prosperity has spearheaded an all-fronts campaign using advertising, social media, and cross-country events aimed at electing lawmakers who will ensure that the fossil-fuel industry won’t have to worry about any new regulations. The group spent $36 million to influence the 2012 elections.

“We’ve been having this debate with the Left for 10 years, and we welcome having the debate with these new groups. If there are groups who want to do a niche effort with the Republican electorate, we’ll win that debate,” says the group’s president, Tim Phillips. He’s not worried that organizations such as Combs’s Christian Coalition or economists such as Laffer will influence lawmakers—because AFP would hit any such candidate with an all-out negative campaign. “Let them bring a carbon tax on. They know it’s political death for them to bring this forward on their own.” 

There’s no denying the political power of groups like Americans for Prosperity. Still, despite its massive wealth, the super PAC failed to achieve either of its two chief political goals of 2012—unseating President Obama and claiming the Senate majority for Republicans.

The goal of grassroots efforts is to persuade Republicans that they’ll be rewarded if they take a stand in support of climate action—and that they could doom their party to minority status if they don’t. Advocates in the GOP realize that it’s too early and too fraught for Republicans seeking reelection to sound the alarm over the changing climate.

But out of sight on Capitol Hill, staffers say, conversations are taking place about how to go about doing that—eventually. “Most Republicans say the same thing behind closed doors: ‘Of course, I get that the climate is changing, of course I get that we need to do something—but I need to get reelected.’ Somehow they’re going to have to find a safe place on this,” says the Audubon Society’s Yarnold.

“We’re trying to get them to come out of the climate closet,” he says. “There’s no question they’re leaving votes on the table because of this. And they know it.”

hurricane sandy
In The Media
Nature
Feb 15, 2013
Natural hazards: New York vs the sea

Nature: Natural hazards: New York vs the sea
By: Jeff Tollefson
February 13, 2013

In the wake of Hurricane Sandy, scientists and officials are trying to protect the largest US city from future floods.

Joe Leader's heart sank as he descended into the South Ferry subway station at the southern tip of Manhattan in New York. It was 8 p.m. on 29 October, and Hurricane Sandy had just made landfall some 150 kilometres south in New Jersey. As chief maintenance officer for the New York city subway system, Leader was out on patrol. He had hoped that the South Ferry station would be a refuge from the storm. Instead, he was greeted by wailing smoke alarms and the roar of gushing water. Three-quarters of the way down the final set of stairs, he pointed his flashlight into the darkness: seawater had already submerged the train platform and was rising a step every minute or two.

“Up until that moment,” Leader recalls, standing on the very same steps, “I thought we were going to be fine.”

Opened in 2009 at a cost of US$545 million, the South Ferry station is now a mess of peeling paint, broken escalators and corroded electrical equipment. Much of Manhattan has returned to normal, but this station, just blocks from one of the world's main financial hubs, could be out of service for 2–3 years. It is just one remnant of a coastal catastrophe wrought by the largest storm in New York's recorded history.

Sandy represents the most significant test yet of the city's claim to be an international leader on the climate front. Working with scientists over the past decade, New York has sought to gird itself against extreme weather and swelling seas and to curb emissions of greenhouse gases — a long-term planning process that few other cities have attempted. But Sandy laid bare the city's vulnerabilities, killing 43 people, leaving thousands homeless, causing an estimated $19 billion in public and private losses and paralysing the financial district. The New York Stock Exchange closed for the first time since 1888, when it was shut down by a massive blizzard.

As the humbled city begins to rebuild, scientists and engineers are trying to assess what happened during Sandy and what problems New York is likely to face in a warmer future. But in a dilemma that echoes wider debates about climate change, there is no consensus about the magnitude of the potential threats — and no agreement about how much the city should spend on coastal defences to reduce them.

On 6 December, during his first major public address after the storm, New York mayor Michael Bloomberg promised to reinvest wisely and to pursue long-term sustainability. But he warned: “We have to live in the real world and make tough decisions based on the costs and benefits.” And he noted that climate change poses threats not just from flooding but also from drought and heat waves. The city must be mindful, he said, “not to fight the last war and miss the new one ahead”.

Calculated risks

In the immediate aftermath of Sandy, lower Manhattan looked like a war zone. Each night, streams of refugees wielding flashlights wandered north out of the blackout zone, where flood waters had knocked out an electrical substation.

The storm devastated several other parts of the city as well. In Staten Island, pounding waves destroyed hundreds of homes, and one neighbourhood in Queens burned to ashes after water sparked an electrical fire. Power outages lasted for more than two weeks in parts of the city. Chastened by the flooding and acutely aware that Hurricane Irene, in 2011, was a near miss, the city is now wondering what comes next.

“Is there a new normal?” asks John Gilbert, chief operating officer of Rudin Management, which manages several office buildings in downtown New York. “And if so, what is it?” Gilbert says that the company is already taking action. At one of its buildings, which took on some 19 million litres of water, the company is moving electrical systems to the second floor. “You have to think that as it has happened, it could happen again,” he says. “And it could be worse.”

At Battery Park, near the South Ferry station, the storm surge from Sandy rose 2.75 metres above the mean high-water level — the highest since gauges were installed there in 1923. In a study published last week in Risk Analysis, researchers working with data from simulated storms concluded that a surge of that magnitude would be expected to hit Battery Park about once every 500 years in the current climate (J. C. J. H. Aerts et al. Risk Anal. http://dx.doi.org/10.1111/risa.12008; 2013).

But the study authors and other scientists say that the real risks may be higher. The study used flooding at Battery Park as a measure of hurricane severity, yet it also showed that some storms could cause less damage there and still hammer the city elsewhere. Factoring in those storms could drive up the probability estimates of major hurricane damage to New York.

The 1-in-500 estimate also does not take into account the unusual nature of Sandy. Dubbed a Frankenstorm, Sandy was a marriage of a tropical cyclone and a powerful winter snowstorm, and it veered into the New Jersey coast along with the high tide of a full Moon. “It was a hybrid storm,” says Kerry Emanuel, a hurricane researcher at the Massachusetts Institute of Technology (MIT) in Cambridge and one of the study's co-authors. “We need to understand how to assess the risks from hybrid events, and I'm not convinced that we do.”

The risks will only increase as the world warms. The New York City Panel on Climate Change's 2010 assessment suggests that local sea level could rise by 0.3–1.4 metres by 2080. Last year, Emanuel and his colleagues found that floods that occur once every 100 years in the current climate could happen every 3–20 years by the end of this century if sea level rises by 1 metre. What is classified as a '500-year' event today could come every 25–240 years (N. Lin et al. Nature Clim. Change 2, 462–467; 2012).

For city planners, the challenge is to rebuild and protect the city in the face of scientific uncertainty. A few scientists have said for more than a decade that the city should armour New York's harbour with a storm-surge barrier similar to the Thames barrier in London. In Sandy's wake, that idea has gained renewed interest, and a New York state panel last month called for a formal assessment of it.

Bridges and barriers

Malcolm Bowman, who heads the storm-surge modelling laboratory at the State University of New York at Stony Brook, has spearheaded the drive for barriers. He imagines a structure roughly 8 kilometres wide and 6 metres high at the entrance to the harbour, and a second barrier where the East River drains into the Long Island Sound. The state panel's cost estimates for such a system range from $7 billion to $29 billion, depending on the design. The harbour barrier could also serve as a bridge for trains and vehicles to the city's airports, suggests Bowman. “My viewpoint is not that we should start pouring concrete next week, but I do think we need to do the studies,” he says. But whether Sandy will push the city to build major defences, Bowman says, “I don't know.”

Disasters have spurred costly action in the past. The 1888 blizzard helped to drive New York to put its elevated commuter trains underground. And in 2012, the US Army Corps of Engineers completed a $1.1-billion surge barrier in New Orleans, Louisiana, as part of a $14.6-billion effort to protect the city after it was battered by hurricanes Katrina and Rita in 2005. But the New York metropolitan area is bigger and more complex than New Orleans, and protecting it will require a multi-pronged approach. Several hundred thousand city residents live along more than 800 kilometres of coastline, and a barrier would not protect much of coastal Long Island, where Sandy wrought considerable damage. Moreover, the barrier would work only against occasional storm surges. It would not hold back the slowly rising sea or protect against flooding caused by rain.

“A storm-surge barrier may be appropriate, but it's never one thing that is going to protect you,” says Adam Freed, a programme director at the Nature Conservancy in New York, who until late last year was deputy director of the city's office of long-term planning and sustainability. “It's going to be a holistic approach, including a lot of unsexy things like elevating electrical equipment out of the basement and providing more back-up generators.”

As part of that holistic effort, officials are exploring options for expanding the remaining bits of wetlands that once surrounded the city and buffered it from storms. In his address, Bloomberg called wetlands “perhaps the best natural barriers against storms that we have”.

But most of the city's wetlands have become prime real estate in recent decades, and Sandy made clear the consequences of developing those areas, says Marit Larson, director of wetlands and riparian restoration for the New York parks department.

A few weeks after the storm, Larson parks her car near the beach on Staten Island and looks out at a field of Phragmites australis, a common marsh reed. The field is part of Staten Island's 'Bluebelt' programme, initiated in the late 1980s to promote wetlands and better manage storm-water runoff. But the patch of wetlands here is smaller than a football pitch, and Sandy's surge rolled over it, damaging the nearby row houses. “If you look at the historical maps,” says Larson, “everything that used to be a wetland got wet.”

New York is now moving to strengthen its network of existing wetlands, which cover some 2,300–4,000 hectares. The mayor's budget plan for 2013–17 includes more than $200 million to restore wetlands as part of an effort to protect and redesign coastal developments.

Sandy also showed how proper construction can help to reduce risks from future storms. In one Staten Island neighbourhood, a battered roof rests on the ground, marking the spot where an ageing bungalow once stood. Next door, a newer house still stands, with no apparent damage apart from a flooded garage — sturdy proof of the value of modern building codes. In New York, newer buildings constructed in 100-year-flood zones, which are defined by the US Federal Emergency Management Agency (FEMA), cannot have any living spaces or major equipment, such as heating units, below the projected flood level (see 'Danger zone').

The city's zoning provisions could not protect against a storm like Sandy: officials estimate that two-thirds of the homes damaged by the storm were outside the 100-year-flood area. But scientists say that the FEMA flood maps were out of date, so even century-scale storms could cause damage well beyond the designated areas. Last month, FEMA began releasing new flood maps for the New York region that substantially expand this zone.

In their latest study, Emanuel and his colleagues estimate the average annual flood risk for New York as only $59 million to $129 million in direct damages. But costs could reach $5 billion for 100-year storms and $11 billion for 500-year storms. These figures do not include lost productivity or damage to major infrastructure, such as subways.

Bowman and other researchers argue that the city should commit to protecting all areas to a 500-year-flood standard, but not all the solutions are physical. A growing chorus of academics and government officials stress that the city must also bolster its response capacity and shore up the basic social services that help people to rebuild and recover.

Most importantly, the city and surrounding region need to develop a comprehensive strategy for defending the coastline, says Jeroen Aerts, a co-author of the Risk Analysis assessment who studies coastal-risk management at VU University in Amsterdam. Aerts is working with New York officials to analyse proposals for the barrier system and a suite of changes in urban planning, zoning and insurance. “You need a master plan,” he says.

“Ultimately, we all have to move together to higher ground.”

Seth Pinsky is working towards that goal. As president of the New York City Economic Development Corporation, he was tapped by Bloomberg to develop a comprehensive recovery plan that will make neighbourhoods and infrastructure safer. He points out that some newer waterfront parks and residential developments along the coast fared well during the storm. For example, at Arverne by the Sea, a housing complex in Queens, Pinsky says that units survived because they are elevated and set back from the water, with some protection from dunes. The buildings suffered little damage compared with surrounding areas.

Intelligent design

The cost of strengthening the city will be astronomical. In January, Congress approved some $60 billion to fund Sandy recovery efforts, with around $33 billion for longer-term investments, including infrastructure repair and construction by the Army Corps of Engineers. Pinsky says that he does not yet know how much of that money will go to New York, but he is sure it will not be enough. The city will define its budget in June, after his group has made its official recommendations. The rebuilding endeavour will probably necessitate a “creative” mix of public and private financing, he says. “It will probably require calling on a combination of almost every tactic that has been tried around the world.”

Even as he calls for more intelligent development, Pinsky says that New York is unlikely to take a drastic approach to dealing with storm surge and sea-level rise. “Retreating from the coastline of New York city both will not be necessary and is not really possible,” he says.

Given the sheer scale of development along the coast, it is hard to argue with Pinsky's assessment. But many climate scientists fear that bolstering coastal developments only delays the eventual reckoning and increases the likelihood of future disasters. The oceans will rise well into the future, they say, so cities will eventually be forced to accommodate the water.

“I don't see anything yet that looks towards long-term solutions,” says Klaus Jacob, a geoscientist at Columbia University's Lamont-Doherty Earth Observatory in Palisades, New York. But Jacob admits that he is as guilty as anyone. In 2003, he and his wife bought a home in a low-lying area on the Hudson River in Piermont, New York. Although it went against his professional principles, he agreed to the purchase with the assumption that he could elevate the house. But height-restriction laws prevented him from doing so, and Sandy flooded the house. The couple are now rebuilding.

“In a way, I think I was in denial about the risk,” Jacob says. He hopes that a new application to raise the house will be approved, but he still fears that the neighbourhood will not survive sea-level rise at the end of the century. New Yorkers and coastal residents everywhere would be wise to learn that lesson. “Ultimately,” Jacob says, “we all have to move together to higher ground.”

Nature 494, 162–164 (14 February 2013) doi:10.1038/494162a

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Feb 11, 2013
Forging a New Direction in Climate Research

Research aimed at predicting future climate activity has primarily focused on large and complex numerical models. While this approach has provided some quantitative estimates of climate change, those predictions can vary greatly from one model to the next and produce doubts in the projected outcome.

In this Faculty Forum Online broadcast Professor Kerry Emanuel '76, PhD '78 discussed a new approach to climate science that emphasizes basic understanding over black box simulation. On Tuesday, Feb. 5, 2013, Emanuel presented an overview of his climate research and took questions from the worldwide MIT community via video chat. Watch the video and visit the Slice of MIT blog to continue the conversation in the comments.




About Kerry Emanuel
A Cecil and Ida Green Professor in the Department of Earth, Atmospheric and Planetary Sciences, Emanuel is a cofounder of the Lorenz Center, an MIT think tank devoted to understanding climate activity. He is the author of What We Know about Climate Change, which The New York Times called "the single best thing written about climate change for a general audience."

In 2006, Emanuel was named by Time magazine as one of the 100 most influential people in the world. He received his bachelor's degree in earth, atmospheric, and planetary sciences from MIT in 1976 and his doctorate in meteorology from MIT in 1978.
 

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Feb 11, 2013
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Feb 11, 2013
Kerry Emanuel: Forging a New Direction in Climate Research
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Oct 17, 2012
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May 2, 2012
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Apr 13, 2012
Facing the facts about our changing climate

MIT researchers join Boston Globe panel in weighing climate risks and resolutions.

In an effort to share what is known, what isn't, and what can and cannot be done about climate change, MIT's John Reilly and Kerry Emanuel joined UMass Amherst researchers as part of a "Global Warning" panel convened by The Boston Globe.

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Apr 1, 2011
Megan Lickley: Adapting Energy Infrastructure to a Flood of Uncertainty
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Feb 26, 2010
Ancient hurricanes

Intense hurricane activity millions of years ago may have caused and sustained warmer climate conditions, new research suggests

A question central to research on global warming is how warmer temperatures caused by increased greenhouse gases could influence climate. Probing the past for clues about this potential effect, MIT and Yale climate scientists examined the Pliocene period, which began five million years ago and which some consider to be a potential analog to modern greenhouse conditions. They found that hurricanes influenced by weakened atmospheric circulation — possibly related to high levels of carbon dioxide — contributed to very warm temperatures in the Pacific Ocean, which in turn led to more frequent and intense hurricanes. The research indicates that Earth's climate may have multiple states based on this feedback cycle, meaning that the climate could change qualitatively in response to the effects of global warming.

Although scientists know that the early Pliocene had carbon dioxide concentrations similar to those of today, it has remained a mystery what caused the high levels of greenhouse gas and how the Pliocene's warm conditions, including an extensive warm pool in the Pacific Ocean and temperatures that were roughly 4 degrees C higher than today's, were maintained.

In a paper published Feb. 25 in Nature, Kerry Emanuel, the Breene M. Kerr Professor of Atmospheric Science in the Department of Earth, Atmospheric and Planetary Science, and two colleagues from Yale University's Department of Geology and Geophysics suggest that a positive feedback between tropical cyclones — commonly called hurricanes and typhoons — and the circulation in the Pacific could have been the mechanism that enabled the Pliocene's warm climate.

The Pliocene ended around three million years ago with the onset of large ice sheets in the Northern Hemisphere. There has been a slow reduction in carbon dioxide levels in the atmosphere for about 15 million years, and it is thought that the start of the glacial cycles was the climate's response once those levels reached a certain threshold, according to co-author Chris Brierley. While that level remains unknown, this research indicates that by increasing carbon dioxide levels, humans could reach the threshold that would induce a Pliocene-like climate.

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Dec 15, 2009
Assessing the impact of 'Climategate'

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At Dec. 10 forum, MIT faculty experts discussed what 'Climategate' really means for climate science and the ongoing policy negotiations in the Congress and at Copenhagen.

The leaked e-mails from the climate scientists at the University of East Anglia (UEA) have caused a huge public relations headache. The e-mails, in which the scientists seemed to question or even exaggerate their research, have provided new fodder for climate-change skeptics, who now feel they have "proof" that global warming is a hoax. The e-mails may be proof of nothing other than frustrated or impatient scientists, but the scientific community nonetheless has to deal with the fallout — the public’s increasing doubt about the validity of climate science, and maybe even doubt about scientific research in general.

"The Great Climategate Debate," held on Dec. 10 (see event and participant details) featured a panel of MIT faculty addressing the issues — both scientific and political — surrounding the controversy in the hopes that it wouldn't become the main focus of this month's United Nations Climate Change Conference in Copenhagen, Denmark. The debate involved the many issues raised by the scandal: the validity of climate science, the motives of the hackers who leaked the e-mails, the need for responsible scientific reporting and ethical standards, and the way the public interprets and understands information from the scientific community.

Kerry Emanuel, the Breene M. Kerr Professor of Meteorology, fears that Climategate was a "premeditated distraction from the main issues" of climate science. Emanuel said he's concerned with the identity and motives of the hackers, citing the very rich "machine" of global warming deniers as a possible culprit. As for the e-mails, he thinks they show nothing more than "humans — a few with failings. Mostly, it shows scientists hard at work."

Richard Lindzen, the A. P. Sloan Professor of Meteorology, believes the e-mails were leaked by a whistleblower within the Climate Research Unit who, like Lindzen, is disillusioned by what he sees as the scientific community’s one-sided argument over climate change. "Undeniably," he said, "we are dealing with issues illegal and unethical." The debate, he said, is whose illegal and unethical behavior is the larger issue: the scientists or the hackers?

Although Ron Prinn, the TEPCO Professor of Atmospheric Science and director of the Center for Global Change Science, thinks the e-mails are unethical and unprofessional, he believes this means little for the validity of the UEA scientists' studies. This controversy, he said, should not cause us to reevaluate our concern over global warming. Prinn notes that the larger body of evidence remains robust: The UEA scientists represent just a few of the many scientists from institutions around the world who are studying climate-change issues.

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Apr 17, 2008
New MIT study validates hurricane prediction

Provides confirmation that climate change intensifies storms

Hurricanes in some areas, including the North Atlantic, are likely to become more intense as a result of global warming even though the number of such storms worldwide may decline, according to a new study by MIT researchers.

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