DOI: 10.1029/2018JG004486
Scopus记录号: 2-s2.0-85052435190
论文题名: Vegetation Greening Despite Weakening Coupling Between Vegetation Growth and Temperature Over the Boreal Region
作者: Guo W. ; Liu H. ; Wu X.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 8 起始页码: 2376
结束页码: 2387
语种: 英语
英文关键词: boreal
; Northern Hemisphere
; vegetation greening
; vegetation growth
; interannual variations
; weakening coupling
英文摘要: The previously reported strong coupling between interannual variations in vegetation growth and mean growing season temperature in the extratropical (>25°N) Northern Hemisphere (NH) has displayed trends of progressive weakening in recent decades. However, the spatiotemporal patterns and drivers of the weakening coupling and its impacts on vegetation growth across the NH remain poorly understood. Here we address these issues using the vegetation index retrieved from remote sensing, global ecosystem model simulations, and gridded climate data. Our results reveal marked fading of the positive coupling between the mean growing season normalized difference vegetation index (NDVIGS) and mean growing season temperature. Areas with significant positive coupling have shrunk from 31.2% to 20.0% over the periods of 1982–1997 and 1997–2012 across the extratropical NH. Vegetation productivity simulations from global ecosystem models did not capture the above mentioned patterns. There shows a continuous vegetation greening, with a greening rate of 0.0007–0.001 NDVI/year, despite the weakening of the positive coupling in the extratropical NH during the past few decades. Our results highlight that a comprehensive understanding of the underlying processes governing vegetation growth-climate coupling is urgently needed for accurate predictions of the future trajectories of the response of boreal terrestrial ecosystems to a warmer and more extreme climate regime. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113419
Appears in Collections: 气候减缓与适应
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作者单位: College of Urban and Environmental Science, and MOE Laboratory for Earth Surface Processes, Peking University, Beijing, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China; Faculty of Geographical Science, Beijing Normal University, Beijing, China
Recommended Citation:
Guo W.,Liu H.,Wu X.. Vegetation Greening Despite Weakening Coupling Between Vegetation Growth and Temperature Over the Boreal Region[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(8)