July 02, 2012
The map depicts the relative concentration of aerosols from wildlife smoke in the skies above the continental U.S. on June 26, 2012. Image by: NASA.
"I have no doubt climate change is playing a role in this," climate scientist Kevin Trenberth, who heads the Climate Analysis Section at the National Center for Atmospheric Research (NCAR), told The Salt Lake Tribune, noting that "there are wildfires all over the place." Located in Boulder Colorado, Trenberth's NCAR lab was recently evacuated due to the Waldo Canyon Fire.
Trenberth may be be a bit more outspoken about the link between on-going fires and climate change than some of this colleagues, but his views are widespread among other climate experts as well.
"Global warming has in general made this part of the world [the Southwest U.S.] warmer and drier than it would be otherwise," Michael Oppenheimer director of the Program in Science, Technology and Environmental Policy (STEP) at Princeton University said in a recent conference call, noting that "what we're seeing fits into a pattern."
Hotter temperatures, lower snow pack, and droughts are creating optimal conditions for fires in the Southwest. In addition, the longtime practice of suppressing small fires and a recent mass-infestation of bark beetles in the region's forests has left plenty of fuel to burn. Add wind, and the fire becomes "a blast furnace," Steven Running, a forest ecologist with the University of Montana, said in the conference call.
When that happens he says, "humans aren't going to stop [these fires] anymore than they're going to stop hurricanes in the Gulf Coast."
Such mega-fires are not a surprise, but fit into general predictions made for a warming world. A 2009 report commissioned by the George W. Bush administration specifically predicted that climate change would increase the likelihood of droughts and wildfires in the American Southwest. The report also made particular note that a rise in wildfires would devastate both forests and property in the area.
The infestation of bark beetles, which is also exacerbating fires in the region, is widely considered to be connected to global climatic changes as well. Bark beetles cannot survive longtime exposure to cold temperatures, but given warmer nights and milder winters, bark beetles have decimated forests in the American and Canadian west over the last decade. Climate change has also allowed bark beetles to successfully infest new areas, including high altitudes and new latitudes.
This year's temperatures have been particularly extreme in the U.S., even though the globe is currently at neutral when it comes to El Nino conditions, which usually harbinger warmer temperatures. The last 12 months have been the warmest on record (going back to 1880) in the continental U.S., and the number of record high temperatures have outpaced record lows by 9 to 1 this year. The past spring was also the warmest ever recorded, while the current summer is breaking some records set during the Dust Bowl.
These extremes also fit into patterns seen worldwide. A recent report by Climate Communication points out that major heatwaves struck Texas in 2011, Russia in 2010 (including massive forest fires), and Europe in 2003. Statistical research has since shown that there is an 80 percent chance that the Russian heatwave of 2010 would not have occurred if not for climate change.
"Extremely hot summers, those more than three standard deviations above the historic average, are now observed in about 10% of the global land area, compared to 0.1-0.2% for the period 1951-1980," reads the report.
Given ongoing climate change, heatwaves, droughts, and fires are expected to occur with greater regularity in some parts of the world, while other regions are expected to become more prone to flooding.
Oppenhemier said that the Waldo Canyon Fire, the most destructive in Colorado's history, was a "vivid image of what we can expect more of in the future." The only way to combat this, says Oppenhemier, is to "[work] as hard as we can to reduce emissions."
While leaders have pledged to keep global temperatures from rising above 2 degrees Celsius (3.6 Fahrenheit), greenhouse gas emissions continue to rise due to inaction. Globally, climate change has pushed temperatures up 0.8 degrees Celsius (1.44 degrees Fahrenheit) to date, but the International Energy Agency warns that the world is currently on track to warm 6 degrees Celsius (10.8 degrees Fahrenheit) by the end of century of nations don't cut their emissions.
Scientists give world leaders 'Fs' on climate change, biodiversity, and desertification
(06/19/2012) It seems world leaders may need to retake environmental studies. As the Rio+20 Summit on Sustainable Development opens, the scientific journal, Nature, has evaluated the progress made on three treaties signed at the Rio Earth Summit in 1992: climate change, biodiversity decline, and desertification. Unfortunately the publication gives progress on all three treaties an 'F', highlighting how little progress has been made on the global environmental crisis.
Experts: ignoring climate change at Rio+20 makes other goals "meaningless"
(06/18/2012) The Climate Change Task Force (CCTF)—made up of 30 climate scientists, other experts and world leaders—warned today that sidelining climate change at the Rio+20 Summit on Sustainable Development threatened progress on the conference's other goals, which includes combating poverty and building economies that value nature. "I am very concerned and worried because the draft final document of the Rio+20 conference does not give proper attention to climate change," says former Russian President Mikhail Gorbachev in a press statement.
Second warmest May yet worldwide
(06/18/2012) Last month was the second warmest May since record-keeping of global temperatures began 132 years ago. Globally, temperatures were 0.66 degrees Celsius (1.19 Fahrenheit) above the 20th Century Average and were only topped by May 2010, according to preliminary findings by the National Oceanic and Atmospheric Administration (NOAA).
U.S. undergoes warmest spring on record
(06/12/2012) Spring in the U.S. was the warmest on record, beating the past record-year (1910), by a stunning two degrees Fahrenheit, according to new data from the National Oceanic and Atmospheric Administration (NOAA). The data also shows that the past 12 months--from June 2011 through May 2012--was the warmest on record in the contiguous U.S. as well.
As Colorado and New Mexico burn, scientists say prepare for more
(06/12/2012) A massive wildlife in Colorado still burns after it has killed one person and damaged or destroyed over a hundred structures. The fire, the third largest in Colorado's history, has burned 39,500 acres (16,000 hectares) to date. Meanwhile in central New Mexico, another wildfire has damaged or destroyed 35 structures and burned 34,500 acres (14,000 hectares). This comes just weeks after New Mexico's largest wildfire ever—still going—burned up over 247,000 acres (100,000 hectares) of the Gila Forest. Weeks of heroic efforts by thousands of firefighters have contained this megafire by only 37 percent to date. Now, a new scientific study in Ecospshere has found that North America and Europe must prepare for even more fires as global temperatures continue to rise from climate change.
Scientists: if we don't act now we're screwed
(06/07/2012) Scientists warn that the Earth may be reaching a planetary tipping point due to a unsustainable human pressures, while the UN releases a new report that finds global society has made significant progress on only four environmental issues out of ninety in the last twenty years. Climate change, overpopulation, overconsumption, and ecosystem destruction could lead to a tipping point that causes planetary collapse, according to a new paper in Nature by 22 scientists. The collapse may lead to a new planetary state that scientists say will be far harsher for human well-being, let alone survival.
Want to stop climate change: buy fossil fuel deposits
(06/07/2012) Governments, NGOs, and others fighting climate change should consider buying coal and oil deposits—not to exploit them, but to keep them from being exploited, according to a bold new policy paper in the Journal of Political Economy. Economist Bard Harstad with the Kellogg School of Management argues that climate coalitions could quickly slash carbon emissions by purchasing and conserving marginal fossil fuel deposits, a strategy that would solve the current problem of carbon leakage, i.e. when cutting emissions in one place pushes others to burn more elsewhere. Given that carbon emissions rose to a new record last year—31.6 gigatons—and carbon has hit 400 parts per million (ppm) in the atmosphere for the first time in at least 800,000 years, Harstad's analysis comes at a time when scientists are warning that urgent and bold action is needed to mitigate global climate change before it becomes irreversible.