January 16th, 2009Temperature change in the Arctic is happening at a greater rate than other places in the Northern Hemisphere, and this is expected to continue in the future. As a result, glacier and ice-sheet melting, sea-ice retreat, coastal erosion and sea level rise can be expected to continue. A new comprehensive scientific synthesis of past Arctic climates demonstrates for the first time the pervasive nature of Arctic climate amplification.
January 13th, 2009Managing invasive plant species on the Great Plains has become more challenging in recent years in the face of human-caused environmental change, including the positive responses of invaders to altered atmospheric chemistry and longer growing seasons, says a University of Colorado at Boulder professor. According to Professor Timothy Seastedt of CU-Boulder's ecology and evolutionary biology department, a warmer and longer growing season, increases in atmospheric carbon dioxide levels and nitrogen deposition on the Great Plains amplify the ability of weedy species to compete with native plants.
December 15th, 2008INSTAAR fellow Mark Williams and Brian Lazar of Stratus Consulting warn that Rocky Mountain ski areas face dramatic changes this century as the climate warms, including best-case scenarios of shortened ski seasons and higher snowlines and worst-case scenarios of bare base areas and winter rains.
November 17th, 2008Increasing levels of nitrogen deposition associated with industry and agriculture can drive soils toward a toxic level of acidification, reducing plant growth and polluting surface waters, according to a new study published online in Nature Geoscience.
November 5th, 2008Vegetation and soils already subjected to long-term acid rain could face even more stress in the form of nitrogen-laden precipitation, according to INSTAAR fellow William D. Bowman. His study of acid precipitation on grassland soils of the Western Tatra Mountains of Slovakia was just released.
September 25th, 2008Scientists from CU-Boulder and the USGS have provided Dot Earth with a closeup view of the remarkable rate of erosion along parts of Alaska’s thawing Arctic Ocean coast. The video clip is one month of crumbling, from late June through late July this year, at a point east of Barrow.