DOI: 10.1002/2014GL060495
论文题名: Increasing summer drying in North American ecosystems in response to longer nonfrozen periods
作者: Parida B.R. ; Buermann W.
刊名: Geophysical Research Letters
ISSN: 0094-9905
EISSN: 1944-9636
出版年: 2014
卷: 41, 期: 15 起始页码: 5476
结束页码: 5483
语种: 英语
英文关键词: climate change
; nonfrozen periods
; North American ecosystems
; summer drought
Scopus关键词: Climate change
; Drought
; Rain
; Annual precipitation
; Nonfrozen
; North American
; Plant productivity
; Precipitation patterns
; Summer droughts
; Vegetation greenness
; Wildfire frequencies
; High Latitudes
; Seasonal shifts
; Summer rainfall
; Ecosystems
; annual variation
; forest ecosystem
; glacial hydrology
; land cover
; moisture content
; seasonal variation
; snow cover
; spring (season)
; summer
; water availability
; North America
英文摘要: In snow-dominated northern ecosystems, spring warming is predicted to decrease water availability later in the season and recent findings suggest that corresponding negative impacts on plant productivity and wildfire frequency are already observable. Here we estimate the overall vulnerability of North American ecosystems to warming-related seasonal shifts in hydrology through identifying robust interannual linkages between nonfrozen periods, peak-to-late summer vegetation greenness, and an indicator of drought for 1982-2010. Our results show that longer nonfrozen periods earlier in the year are persistently associated with declines in peak-to-late summer greenness and moisture availability across large portions of North America. Hereby, vulnerabilities increase markedly across the dominant land covers with decreasing annual precipitation rates, lowering contributions of summer rainfall, and increasing altitude. The implications are that in a warmer world, seasonal hydrological shifts may emerge as a leading factor for summer drought in relatively dry temperate-forested ecosystems and across the northern high latitudes. Key Points Longer nonfrozen periods linked to summer greenness decline across NA Drought indicator and precipitation pattern confirm summer drought signal Seasonal shift in hydrology is a leading drought factor in northern ecosystems © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905295948&doi=10.1002%2f2014GL060495&partnerID=40&md5=0a8b714f986c585352ed40860fb465ce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7169
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil Engineering, Shiv Nadar University, Dadri, India
Recommended Citation:
Parida B.R.,Buermann W.. Increasing summer drying in North American ecosystems in response to longer nonfrozen periods[J]. Geophysical Research Letters,2014-01-01,41(15).