2000: Temperature and precipitation of Alaska: 50 year trend analysis

• Main Authors: J. M. Stafford, G. Wendler, J. Curtis
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Barrow; Alaska
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.537.545; http://www.dvfu.ru/meteo/library/00670033.pdf

were examined for 25 stations throughout the State of Alaska. Mean, maxima, and minima temperatures, diurnal temperature range, and total precipitation were analyzed for linear trends using least squares regressions. Annual and seasonal mean temperature increases were found through-out the entire state, and the majority were found to be statistically significant at the 95 % level or better. The highest increases were found in winter in the Interior region (2.2 C) for the 50 year period of record. Decreases in annual and seasonal mean diurnal temperature range were also found, of which only about half were statistically significant. A state-wide decrease in annual mean diurnal temperature range was found to be 0.3 C, with substan-tially higher decreases in the South/Southeastern region in winter. Increases were found in total precipitation for 3 of the 4 seasons throughout most of Alaska, while summer preci-pitation showed decreases at many stations. Few of the precipitation trends were found to be statistically signifi-cant, due to high interannual variability. Barrow, our only station in the Arctic region, shows statistically significant decreases in annual and winter total precipitation. These findings are largely in agreement with existing literature, although they do contradict some of the precipitation trends predicted by the CO2-doubling GCM’s. 1.