DOI: 10.1175/JCLI-D-12-00044.1
Scopus记录号: 2-s2.0-84875869276
论文题名: Relationships between recent pan-arctic snow cover and hydroclimate trends
作者: Shi X. ; Déry S.J. ; Groisman P.Y. ; Lettenmaier D.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 6 起始页码: 2048
结束页码: 2064
语种: 英语
Scopus关键词: Atmospheric water vapor
; Diurnal temperature ranges
; National Oceanic and Atmospheric Administration
; Primary energy source
; Spatial and temporal variation
; Surface air temperatures
; Surface energy fluxes
; Variable infiltration capacities
; Atmospheric temperature
; Digital storage
; Interfacial energy
; Snow
; air temperature
; albedo
; latent heat flux
; net radiation
; NOAA satellite
; Northern Hemisphere
; sensible heat flux
; snow cover
; spatial variation
; temporal variation
; Eurasia
; North America
英文摘要: Using the Variable Infiltration Capacity (VIC) land surface model forced with gridded climatic observations, the authors reproduce spatial and temporal variations of snow cover extent (SCE) reported by the National Oceanic and Atmospheric Administration (NOAA) Northern Hemisphere weekly satellite SCE data. Both observed and modeled North American and Eurasian snow cover in the pan-Arctic have statistically significant negative trends from April through June over the period 1972-2006. To diagnose the causes of the pan-Arctic SCE recession, the authors identify the role of surface energy fluxes generated in VIC and assess the relationships between 15 hydroclimatic indicators and NOAA SCE observations over each snowcovered sensitivity zone (SCSZ) for both North America and Eurasia. The authors find that surface net radiation (SNR) provides the primary energy source and sensible heat (SH) plays a secondary role in observed changes of SCE. As compared with SNR and SH, latent heat has only a minor influence on snow cover changes. In addition, these changes in surface energy fluxes resulting in the pan-Arctic snow cover recession are mainly driven by statistically significant decreases in snow surface albedo and increased air temperatures (surface air temperature, daily maximum temperature, and daily minimum temperature), as well as statistically significant increased atmospheric water vapor pressure. Contributions of other hydroclimate variables that the authors analyzed (downward shortwave radiation, precipitation, diurnal temperature range, wind speed, and cloud cover) are not significant for observed SCE changes in either the North American or Eurasian SCSZs. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51955
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, United States; Environmental Science and Engineering Program, University of Northern British Columbia, Prince George, BC, Canada; National Climatic Data Center, Asheville, NC, United States
Recommended Citation:
Shi X.,Déry S.J.,Groisman P.Y.,et al. Relationships between recent pan-arctic snow cover and hydroclimate trends[J]. Journal of Climate,2013-01-01,26(6)