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Scientists: Iowa weather extremes consistent with climate change

by: desmoinesdem

Mon Nov 19, 2012 at 17:20:00 PM CST


More than 100 scientists and researchers from 27 Iowa colleges and universities have signed a new statement on the relationship between climate change and weather extremes like the drought of 2012.
desmoinesdem :: Scientists: Iowa weather extremes consistent with climate change
Many Iowa researchers collaborated on this 2011 report documenting how climate change is already affecting Iowa's agriculture, plants and animals, public health, economy, infrastructure, and emergency services.

A similar group of climate experts decided to update the statement in light of Iowa's historic drought in 2012. They released their findings at a press conference in Des Moines this morning. Radio Iowa's O.Kay Henderson posted a link to the full audio. Here's a video of the scientists' presentation:

The lead authors of the new statement are:

Gene Takle, Director, Climate Science Program, Professor of Agronomy, Professor of Geological and Atmospheric Sciences, Iowa State University.

Jerald Schnoor, Co-Director, Center for Global and Regional Environmental Research, University of Iowa.

Christopher J. Anderson,  Research Assistant Professor, Climate Science Program, Iowa State University.

Greg Carmichael, Co-Director, Center for Global and Regional Environmental Research, University of Iowa.

Neil Bernstein, Chair, Department of Natural and Applied Sciences, Mount Mercy University.

David Courard-Hauri, Chair, Environmental Science and Policy Program, Drake University.

Courard-Hauri warned, "Iowans are living with climate change now and it is already costing us money." He and the other scientists urged policy changes that will reduce our carbon footprint while creating jobs in Iowa.

Anderson explained, "In a warmer climate, wet years get wetter and dry years get dryer.  And dry years get hotter - that is precisely what happened in Iowa this year."

Here's the full climate statement released today:

As science faculty and research staff at Iowa universities and colleges, we have confidence in recent findings that climate change is real and having an impact on the economy and natural resources of Iowa. We feel that it is important for citizens of Iowa to understand its implications. Iowans are living with climate change now and it is costing us money already. The drought that we are currently experiencing is consistent with an observed warmer climate, although science cannot say with certainty that the drought of 2012 was caused directly by human activities. The following observations support the case that more droughts and floods are likely in the future.

1. Globally over the past 30 years, there is clear statistical evidence that extreme high temperatures are occurring disproportionately more than extreme low temperatures. The climate likely will continue to warm due to increasing global emissions and accumulation of greenhouse gases.

2. In a warmer climate, wet years get wetter and dry years get dryer. And dry years get hotter ‐ that is precisely what happened in Iowa this year. We can expect Iowa to experience higher temperatures when dry weather patterns predominate. The latest science, based on overwhelming lines of physical evidence, indicates we can expect dry periods to be more frequent as soon as the 2020s.

3. Iowa also has experienced an increasing frequency of intense rains over the past 50 years (Iowa Climate Change Impacts 2010, www.dnr.gov), likely due to a higher surface evaporation in a warmer world. Because of these extremes in precipitation (drought and flood), Iowans will increasingly need infrastructure investments to adapt to climate fluctuations while developing and implementing mitigation.

As global citizens, Iowans should be a part of the solution. We can prosper, create jobs, and provide an engine for economic growth in the process (Iowa Climate Change Advisory Committee 2008 report, www.iaclimatechange.us). Iowa should lead innovation in reducing greenhouse gas emissions, improve resilience in agriculture and communities, and move towards greater energy efficiency and increased use of renewable energy.

You can view all 138 signers' names, titles and affiliations here.

The University of Iowa's Center for Global & Regional Environmental Research has posted more information about climate change in Iowa on its website.

UPDATE: Although Republicans kept control of the U.S. House, President Barack Obama could take federal action to combat climate change without Congressional approval. Chris Mooney outlined five "big steps the president can take."

Regarding federal policy on climate change, I also recommend A Siegel's post: "Mr. President: begin the climate 'education process' with your senior staff."

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