Scopus记录号: 2-s2.0-85044326542
论文题名: Characteristics of Eurasian snowmelt and its impacts on the land surface and surface climate
作者: Ye K. ; Lau N.-C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期: 2019-01-02 起始页码: 1115
结束页码: 1138
语种: 英语
英文关键词: Atmospheric circulation
; Climate anomalies
; Eurasian snowmelt
; GLDAS
; Hydrological effects
英文摘要: The local hydrological and climatic impacts of Eurasian snowmelt are studied using advanced land surface and atmospheric data. It is found that intense melting of snow is located at mid-high latitudes in April and May. Snowmelt plays an important role in determining the seasonal cycles of surface runoff and soil moisture (SM). Specifically, melting is accompanied by sharp responses in surface runoff and surface SM while the impacts are delayed for deeper-layer of soil. This is particularly significant in the western sector of Eurasia. On interannual timescales, the responses of various surface parameters to snowmelt in the same month are rather significant. However, the persistence of surface SM anomalies is weak due to the strong soil evaporation anomalies and surplus of surface energy for evaporation. Strong impacts on the sensible heat flux, planetary boundary layer height and precipitation in the next month following the melting of snow are identified in west Russia and Siberia. Downward propagation of surface SM anomalies is observed and a positive evaporation–convection feedback is identified in west Russia. However, the subsequent impacts on the local convective precipitation in late spring-summer and its contribution to the total precipitation are seemingly weak. The atmospheric water vapor convergence has strong control over the total precipitation anomalies. Overall, snowmelt-produced SM anomalies are not found to significantly impact the late spring-summer local climate anomalies in Northern Eurasia. Therefore, the delayed remote-responses of atmospheric circulation and climate to the melting of Eurasian snow may be only possible near the melting period. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122451
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, Hong Kong; Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, Hong Kong; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Recommended Citation:
Ye K.,Lau N.-C.. Characteristics of Eurasian snowmelt and its impacts on the land surface and surface climate[J]. Climate Dynamics,2019-01-01,52(2019-01-02)