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<p>Karl Linden, professor of environmental engineering and a water treatment expert, has been leading a yearlong study of the environmental fate of the oil dispersants used in the Gulf of Mexico cleanup. His research team has traveled to the Gulf area to collect samples and is investigating the chemical constituents in the dispersant, as well as its sunlight-based decay in the laboratory. Linden can be reached at 303-492-4798 or <a href="mailto:karl.linden@colorado.edu">karl.linden@colorado.edu</a>.</p>

<p>The BP Deepwater Horizon oil spill caused social disruption and psychological stress among Gulf residents that is similar to the aftermath of the Exxon Valdez spill and the impacts are likely to persist for years, a new study finds.</p>

<p>The 2011 Arctic sea ice extent maximum that marks the beginning of the melt season appears to be tied for the lowest ever measured by satellites, say scientists at the ÌÒÉ«ÊÓƵ's National Snow and Ice Data Center.</p>

<p>When a team of researchers from the National Oceanic and Atmospheric Administration and the ÌÒÉ«ÊÓƵ's Cooperative Institute for Research in Environmental Sciences raced to the scene of the BP Deepwater Horizon oil spill to assess the disaster's impact on air quality last year, they found more than they expected.</p>

<p>The deadly Russian heat wave of 2010 was due to a natural atmospheric phenomenon often associated with weather extremes, according to a new study by scientists at the National Oceanic and Atmospheric Administration and the ÌÒÉ«ÊÓƵ's Cooperative Institute for Research in Environmental Sciences, or CIRES</p>

<p>Up to two-thirds of Earth's permafrost likely will disappear by 2200 as a result of warming temperatures, unleashing vast quantities of carbon into the atmosphere, says a new study by the ÌÒÉ«ÊÓƵ's Cooperative Institute for Research in Environmental Sciences.</p>

<p>The temperatures of North Atlantic Ocean water flowing north into the Arctic Ocean adjacent to Greenland -- the warmest water in at least 2,000 years -- are likely related to the amplification of global warming in the Arctic, says a new international study involving the ÌÒÉ«ÊÓƵ.</p>

<p>WASHINGTON —Scientists have taken a major step toward accurately determining the amount of energy that the sun provides to Earth, and how variations in that energy may contribute to climate change.</p>

<p>Rising concentrations of zinc in a waterway on Colorado's Western Slope may be the result of climate change that is affecting the timing of annual snowmelt, says a new study led by the University of Colorado at Boulder.</p>

<p>A novel project using cameras mounted on unmanned aircraft flying over the Arctic is serving double duty by assessing the characteristics of declining sea ice and using the same aerial photos to pinpoint seals that have hauled up on ice floes.</p>