globalchange  > 气候变化与战略
DOI: 10.5194/tc-15-883-2021
Trends and spatial variation in rain-on-snow events over the Arctic Ocean during the early melt season
Author: Dou T.; Xiao C.; Liu J.; Wang Q.; Pan S.; Su J.; Yuan X.; Ding M.; Zhang F.; Xue K.; Bieniek P.A.; Eicken H.
Source Publication: Cryosphere
ISSN: 19940416
Publishing Year: 2021
Volume: 15, Issue:2
pages begin: 883
pages end: 895
Language: 英语
Keyword: coastal zone ; ice-ocean interaction ; marginal sea ; precipitation (climatology) ; sea ice ; snow cover ; spatial variation ; spatiotemporal analysis ; trend analysis ; Arctic Ocean ; Canada ; Canadian Arctic ; Eurasia ; Pacific Ocean
English Abstract: Rain-on-snow (ROS) events can accelerate the surface ablation of sea ice, thus greatly influencing the ice-albedo feedback. However, the variability of ROS events over the Arctic Ocean is poorly understood due to limited historical station data in this region. In this study early melt season ROS events were investigated based on four widely used reanalysis products (ERA-Interim, JRA-55, MERRA, and ERA5) in conjunction with available observations at Arctic coastal stations. The performance of the reanalysis products in representing the timing of ROS events and the phase change of precipitation was assessed. Our results show that ERA-Interim better represents the onset date of ROS events in spring, and ERA5 better represents the phase change of precipitation associated with ROS events. All reanalyses indicate that ROS event timing has shifted to earlier dates in recent decades (with maximum trends up to-4 to-6 d per decade in some regions in ERA-Interim) and that sea ice melt onset in the Pacific sector and most of the Eurasian marginal seas is correlated with this shift. There has been a clear transition from solid to liquid precipitation, leading to more ROS events in spring, although large discrepancies were found between different reanalysis products. In ERA5, the shift from solid to liquid precipitation phase during the early melt season has directly contributed to a reduction in spring snow depth on sea ice by more than-0:5 cm per decade averaged over the Arctic Ocean since 1980, with the largest contribution (about-2:0 cm per decade) in the Kara-Barents seas and Canadian Arctic Archipelago. © 2021 Copernicus GmbH. All rights reserved.
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Affiliation: College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Physical Oceanography Laboratory, Ocean University of China, 238 Songling Road, Qingdao, 266100, China; Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, United States; Institute of Tibetan Plateau and Polar Meteorology, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK 99775-7340, United States

Recommended Citation:
Dou T.,Xiao C.,Liu J.,et al. Trends and spatial variation in rain-on-snow events over the Arctic Ocean during the early melt season[J]. Cryosphere,2021-01-01,15(2)
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