Assessment of Alaska Rain-on-Snow Events Using Dynamical Downscaling
| العنوان: | Assessment of Alaska Rain-on-Snow Events Using Dynamical Downscaling |
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| المؤلفون: | Peter A. Bieniek, Jennifer K. Roach, Rick Lader, Brad Griffith, John Walsh, Uma S. Bhatt, Richard Thoman |
| المصدر: | Journal of Applied Meteorology and Climatology. 57:1847-1863 |
| بيانات النشر: | American Meteorological Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Atmospheric Science, 010504 meteorology & atmospheric sciences, Ecology (disciplines), 0208 environmental biotechnology, Climate change, 02 engineering and technology, Snow, 01 natural sciences, 020801 environmental engineering, Arctic, Climatology, Environmental science, geographic locations, 0105 earth and related environmental sciences, Icing, Downscaling |
| الوصف: | The ice formed by cold-season rainfall or rain on snow (ROS) has striking impacts on the economy and ecology of Alaska. An understanding of the atmospheric drivers of ROS events is required to better predict them and plan for environmental change. The spatially/temporally sparse network of stations in Alaska makes studying such events challenging, and gridded reanalysis or remote sensing products are necessary to fill the gaps. Recently developed dynamically downscaled climate data provide a new suite of high-resolution variables for investigating historical and projected ROS events across all of Alaska from 1979 to 2100. The dynamically downscaled reanalysis data of ERA-Interim replicated the seasonal patterns of ROS events but tended to produce more rain events than in station observations. However, dynamical downscaling reduced the bias toward more rain events in the coarse reanalysis. ROS occurred most frequently over southwestern and southern coastal regions. Extreme events with the heaviest rainfall generally coincided with anomalous high pressure centered to the south/southeast of the locations receiving the event and warm-air advection from the resulting southwesterly wind flow. ROS events were projected to increase in frequency overall and for extremes across most of the region but were expected to decline over southwestern/southern Alaska. Increases in frequency were projected as a result of more frequent winter rainfall, but the number of ROS events may ultimately decline in some areas as a result of temperatures rising above the freezing threshold. These projected changes in ROS can significantly affect wildlife, vegetation, and human activities across the Alaska landscape. |
| تدمد: | 1558-8432 1558-8424 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f73e6d5b0b0b1804f690bfce1dcc47c1 https://doi.org/10.1175/jamc-d-17-0276.1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........f73e6d5b0b0b1804f690bfce1dcc47c1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15588432 15588424 |
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