By John E. Hobbie, George W. Kling
During this version of the long run Ecological learn community sequence, editors John Hobbie and George Kling and fifty eight co-authors synthesize the findings from the NSF-funded Arctic LTER undertaking established at Toolik Lake, Alaska, a domain that has been lively because the mid-1970s. The ebook offers learn at the middle problems with climate-change technology within the treeless arctic quarter of Alaska. As a complete, it examines either terrestrial and freshwater-aquatic ecosystems, and their 3 general habitats: tundra, streams, and lakes.
The booklet presents a background of the Toolik Lake LTER website, and discusses its current situation and destiny outlook. It positive aspects contributions from most sensible scientists from many fields, making a multidisciplinary survey of the Alaskan arctic environment. bankruptcy themes comprise glacial heritage, climatology, land-water interactions, mercury present in the Alaskan arctic, and the reaction of those habitats to environmental swap. the ultimate bankruptcy predicts the implications that arctic Alaska faces as a result of worldwide warming and weather switch, and discusses the longer term ecology of the LTER website within the area.
Alaska's altering Arctic is the definitive clinical survey of the previous, current, and way forward for the ecology of the Alaskan arctic.
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Additional resources for Alaska's Changing Arctic: Ecological Consequences for Tundra, Streams, and Lakes
The Toolik data chosen for study begin on January 1, 1989, and end on December 31, 2010 (21 years). Robinson’s work on digitizing NOAA/NWS charts (Robinson et al. 2001). Correction factors for gauge-based data in the National Climate Data Center (NCDC) Global Summary of the Day archive are provided by D. 2005). indd 23 11/26/2013 8:55:37 PM 24 Alaska’s Changing Arctic Analyses of Historical Climate Data from the Arctic LTER site Climate data collected at Toolik by the LTER project and the Toolik Field Station staff were used to examine seasonal values and long-term trends of incoming solar radiation, surface air temperature, ground temperatures (surface and 20 cm), precipitation, wind speed and wind direction at 5 m, and growing-season length.
It should be noted that the nearsurface air temperature measurements are quite variable from year to year; therefore, small changes are difficult to discern at a decadal scale. On the other hand, the permafrost temperature changes measured at 20 m depth are by their nature an integrated measure of climate over time. In fact, measurements are taken at 20 m because at this depth the seasonal changes are damped out, and it is easier to determine small changes in the trend of climate. In this book, several other indicators of a warming climate in the vicinity of the Arctic LTER site at Toolik Lake are presented.
77 fails t-test at CI = 95%. indd 37 11/26/2013 8:55:40 PM 38 Alaska’s Changing Arctic Hourly meteorological data recorded at the stations were summed or averaged to provide monthly or annual climatologies of air temperature, relative humidity, atmospheric pressure, rainfall, wind speed, and wind direction. Missing data were filled in by linearly weighting the corresponding meteorological parameters from neighboring stations inversely to the square of distance between stations. 1 with nonexistent or missing data at the same time did not contribute to the weighting scheme and more emphasis was given to other locations.
Alaska's Changing Arctic: Ecological Consequences for Tundra, Streams, and Lakes by John E. Hobbie, George W. Kling