DOI: 10.1016/j.gloplacha.2012.10.019
论文题名: Positive impacts of precipitation intensity on monthly CO2 fluxes in North America
作者: Wu C. ; Chen J.M. ; Desai A.R. ; Lafleur P.M. ; Verma S.B.
刊名: Global and Planetary Change
ISSN: 0921-8384
出版年: 2013
卷: 100 起始页码: 204
结束页码: 214
语种: 英语
英文关键词: Gross ecosystem production
; Leaf area index
; North America
; Precipitation pattern
Scopus关键词: Boreal ecosystems
; Climate factors
; Gross ecosystem productions
; Leaf Area Index
; Negative correlation
; North America
; Plant functional type
; Precipitation intensity
; Precipitation patterns
; Regression lines
; Temperate regions
; Temporal scale
; Terrestrial ecosystems
; Total precipitation
; Carbon dioxide
; Ecosystems
; carbon dioxide
; climate modeling
; leaf area index
; net ecosystem production
; precipitation intensity
; seasonal variation
; storm surge
; terrestrial ecosystem
; North America
英文摘要: Precipitation is one of the most important climate factors that can affect the gross ecosystem production (GEP) of terrestrial ecosystems. Positive impacts of precipitation on annual GEP have been reported for vegetated areas worldwide. However, little is known about the influence of precipitation intensity on GEP, especially at the monthly to seasonal temporal scale. Here we show that monthly GEP is insensitive to the sum of monthly total precipitation (Ps, mm), but positively correlated to precipitation intensity (Pa, mm), defined as the average precipitation per event from half-hourly measurements over a month. Different plant functional types (PFTs) exhibit substantial differences in the sensitivity of monthly GEP to Pa. PFTs of water-limited regions responded more intensely than those in mesic environments, as demonstrated by a negative correlation between the slope of the GEP-Pa regression line and average Pa. Furthermore, this slope increases with latitude, indicating higher sensitivity of GEP to Pa for boreal ecosystems than for temperate regions. Therefore, we anticipate increased intensity of storms, as projected by some climate models, may impart a previously overlooked positive impact on precipitation intensity on GEP. © 2012 Elsevier B.V.. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869137817&doi=10.1016%2fj.gloplacha.2012.10.019&partnerID=40&md5=974eaa81bf08bdb0b61d00583303ea7b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11290
Appears in Collections: 全球变化的国际研究计划
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作者单位: The State Key Laboratory of Remote Sensing Science, Laboratory of Digital Earth Sciences, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Wu C.,Chen J.M.,Desai A.R.,et al. Positive impacts of precipitation intensity on monthly CO2 fluxes in North America[J]. Global and Planetary Change,2013-01-01,100.