Three weeks and three days before Hurricane Katrina devastated New Orleans 10 years ago, a paper of mine appeared in the scientific journal Nature showing that North Atlantic hurricane power was strongly correlated with the temperature of the tropical Atlantic during hurricane season, and that both had been increasing rapidly over the previous 30 years or so. It attributed these increases to a combination of natural climate oscillations and to global warming.
Had Katrina not occurred, this paper and another by an independent team would merely have contributed to the slowly accumulating literature on the relationship between climate and hurricanes.
Instead, the two papers inspired a media firestorm, polarizing popular opinion and, to some extent, scientists themselves, on whether global warming was in some way responsible for Katrina. While the firestorm was mostly destructive, benefiting only the media, it had a silver lining in inspiring a much more concerted effort by atmospheric and climate scientists to understand how hurricanes influence and are influenced by climate.
We have learned much in the intervening years.
This article was originally published on The Conversation.
The Earth seems to have been smoking a lot recently. Volcanoes are currently erupting in Iceland, Hawaii, Indonesia and Mexico. Others, in the Philippines and Papua New Guinea, erupted recently but seem to have calmed down. Many of these have threatened homes and forced evacuations. But among their less-endangered spectators, these eruptions may have raised a question: Is there such a thing as a season for volcanic eruptions?
Surprisingly, this may be a possibility. While volcanoes may not have “seasons” as we know them, scientists have started to discern intriguing patterns in their activity.
By Linda Marsa
The following excerpt from Marsa’s forthcoming book, “Fevered: How a Hotter Planet Will Harm Our Health and How We Can Save Ourselves,” was originally published on PLOS Blogs as part of their series “The Science of Extinction and Survival: Conversations on Climate Change.”
The wild swings in weather that are expected to become commonplace as the planet gets warmer—more frequent and severe droughts, followed by drenching rains—change ecosystems in a way that awaken and expedite the transmission of once dormant diseases.
Intriguingly, this type of weather pattern may be what led to the fall of the once mighty Aztec Empire in the early 16th century–and not as is commonly held, by the invasion of European colonialists, who brought with them diseases like mumps, measles and smallpox for which the native populations lacked immunity.
By Dave Levitan
Diamond City, North Carolina, is not actually a city, in that no one actually lives there. People did live there, though, back in 1899. That was when a major hurricane hit the community, on a small barrier island near Cape Hatteras. Homes were destroyed, animals were killed, and graves were uncovered or washed away in the storm according to a conservation group in the area. By 1902, all 500 residents in Diamond City had picked up and left.
The people there didn’t have computer climate models, or rapidly rising seas, or any understanding of increasing storm vulnerability; they just had a desire not to deal with what they assumed would be a constant problem. That problem, of course, is one that anyone living on the East Coast is confronting, especially with the waters of Hurricane Sandy still slowly receding from our coastal consciousness. The question is, when should people in New Jersey, Long Island, Maryland, and elsewhere start thinking about leaving behind their own versions of Diamond City?
Tom Yulsman is co-director of the Center for Environmental Journalism at the University of Colorado. His work has appeared in a variety of publications, including the New York Times, Washington Post, Climate Central, the Daily Climate and Audubon.
In a week or so, it will be official: 2012 was the warmest year on record in the contiguous United States. In fact, if a projection by Climate Central turns out to be correct, 2012 will smash the previous record by a whopping 1 degree F.
But for a good portion of the country, 2013 has gotten off to a rather frosty start. On Jan. 3, with much colder than normal temperatures extending all the way to the Gulf Coast, the most frigid spot in the nation (including Alaska) was officially Alamosa, Colorado. Here, the temperature plunged to an astonishing low of -33 degrees.
Keith Kloor is a freelance journalist whose stories have appeared in a range of publications, from Science to Smithsonian. Since 2004, he’s been an adjunct professor of journalism at New York University. You can find him on Twitter here.
When it comes to climate change, the bad news pummels you the way Mike Tyson, in his prime, pummeled opponents into submission. The onslaught is so relentless that sometimes I just want to crumple into a heap and yell: Make it stop! The latest beat-down, for example, is news of the record ice shrinkage in the Arctic. That seems to have shaken up a lot of people.
But before everyone sinks into catatonic despair, I want to return to a recent piece of stunningly good news on the climate front. Perhaps you saw the headline several weeks ago: “U.S. carbon emissions drop to 20-year low.”
Alas, there was a catch. The biggest reason for the decline, as the AP reported, “is that cheap and plentiful natural gas has led many power plant operators to switch from dirtier-burning coal.”
If this isn’t the definition of quandary, I don’t know what is. Gas emits much less carbon than coal (probably between 25% and 50% less), which is a net plus on the global warming ledger. And shale gas, in case you hadn’t heard, is entering a golden age; it is abundant and newly retrievable across the world, not just in the United States. It’s the bridge fuel to a clean energy future that liberal think tanks and university researchers were touting just a few years ago. Given the political stalemate on climate change, one energy expert gushed in a recent NYT op-ed: “Shale gas to the rescue.”
But a grassroots backlash to the relatively new technology (hydraulic fracturing) that unlocks shale gas has set in motion powerful forces opposed to this bridge getting built. Leading climate campaigners, citing concerns about industry practices and continued reliance on fossil fuels (even if less carbon intensive), are now a big part of the growing anti-fracking coalition. Mainstream environmentalists have also jumped on that bandwagon.
Thus the battle lines are drawn, with enviros and climate activists digging in their heels against a shale gas revolution that could pay big climate dividends. This is a story in of itself. Now a new twist promises to make it even more interesting. Earlier this week, Michael Bloomberg, the billionaire philanthropist and New York City mayor, gave the Environmental Defense Fund (EDF) a $6 million grant for its work “to minimize the environmental impacts of natural gas operations through hydraulic fracturing.” The grant follows on the heels of a Washington Post op-ed that Bloomberg co-authored with a gas industry executive. In the piece, they champion the environmental and economic benefits of natural gas, while also calling for more stringent fracking rules and better industry practices.
By Keith Kloor, a freelance journalist whose stories have appeared in a range of publications, from Science to Smithsonian. Since 2004, he’s been an adjunct professor of journalism at New York University. You can find him on Twitter here.
Last year, after Al Gore said in a speech that climate change was responsible for various extreme weather events around the globe, he got spanked by Oxford climate scientist Myles Allen, who wrote a column in the Guardian entitled, “Al Gore is doing a disservice by overplaying the link between climate change and the weather.”
I have to wonder if Allen is now thinking the same thing of NASA climatologist James Hansen. Because, as New York Times reporter John Broder puts it, Hansen, this week, has “roiled” the climate science community “with a new scientific paper explicitly linking high concentrations of carbon dioxide and other heat-trapping gases to recent severe heat waves and drought.”
The controversial paper was published on Monday in the Proceedings of the National Academies of Sciences (PNAS). A day earlier, Hansen previewed the study’s findings in a Washington Post op-ed, in which he made this jaw-dropping assertion:
It is no longer enough to say that global warming will increase the likelihood of extreme weather and to repeat the caveat that no individual weather event can be directly linked to climate change. To the contrary, our analysis shows that, for the extreme hot weather of the recent past, there is virtually no explanation other than climate change.
The “stabilization wedge” idea is a modular way of reducing carbon emissions.
The world is now home to 7 billion people, each of whom contributes to the carbon emissions that are slowly cooking the globe. To find out how growing population affects our plans to deal with climate change, we talked with Princeton’s Robert Socolow, co-creator of one of the best models for thinking about how to prevent climate change.
Many of my students are “green” consumers. They are proud of riding bicycles, they turn off lights when they leave the room, and they eat little or no meat. But they are usually surprised when I tell them that the most important decision they will make, as far as its impact on natural resources is concerned, is how many children to have.
Most sources of carbon emissions—heating and lighting homes and stores, making steel, providing food—grow in proportion to population. We’ve just hit 7 billion people, and there’s no way any single approach, or just two or three approaches, can effectively deal with the environmental pressures that this many people exert.
To foster a way of thinking about the problem of climate change that involves using many different approaches in tandem, Steve Pacala and I introduced the “stabilization wedge” in 2004. A wedge is a campaign or strategy that reduces carbon dioxide emissions to the atmosphere over the next 50 years by a specific amount, relative to some baseline future where nothing is done to slow down climate change. Examples of wedge strategies are driving more efficient cars, driving cars less far because cities are laid out differently, building lots of wind power, and growing many more trees.