DOI: 10.1175/JCLI-D-13-00080.1
Scopus记录号: 2-s2.0-84892474595
论文题名: Observed local and remote influences of vegetation on the atmosphere across North America using a model-validated statistical technique that first excludes oceanic forcings
作者: Wang F. ; Notaro M. ; Liu Z. ; Chen G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 362
结束页码: 382
语种: 英语
Scopus关键词: Atmosphere-land interactions
; Atmospheric circulation
; Community climate system model
; Generalized equilibriums
; Interannual variability
; Multivariate statistical method
; Statistical techniques
; Vegetation-atmosphere interactions
; Climate models
; Feedback
; Meteorology
; Sea level
; Statistical methods
; Statistics
; Surface roughness
; Vegetation
; advection
; air temperature
; annual variation
; atmospheric circulation
; boreal forest
; climate modeling
; evapotranspiration
; hydrology
; meteorology
; monsoon
; multivariate analysis
; surface roughness
; teleconnection
; vegetation
; United States
英文摘要: The observed local and nonlocal influences of vegetation on the atmosphere across North America are quantified after first removing the oceanic impact. The interaction between vegetation and the atmosphere is dominated by forcing from the atmosphere, making it difficult to extract the forcing from vegetation. Furthermore, the atmosphere is not only influenced by vegetation but also the oceans, so in order to extract the vegetation impact, the oceanic forcing must first be excluded. This study identified significant vegetation impact in two climatically and ecologically unique regions: theNorth Americanmonsoon region (NAMR) and the NorthAmerican boreal forest (NABF). A multivariate statistical method, a generalized equilibrium feedback assessment, is applied to extract vegetation influence on the atmosphere. The statistical method is validated using a dynamical experiment for the NAMR in a fully coupled climate model, the Community Climate System Model, version 3.5 (CCSM3.5). The observed influence of NAMR vegetation on the atmosphere peaks in June-August and is primarily attributed to both roughness and hydrological feedbacks. Elevated vegetation amount increases evapotranspiration and surface roughness, which leads to a local decline in sea level pressure and generates an atmospheric teleconnection response. This atmospheric response leads to moister and cooler (drier and warmer) conditions over thewestern and centralUnited States (Gulf states). The observed influence of theNABF on the atmosphere peaks in March-May, related to a thermal feedback. Enhanced vegetation greenness increases the air temperature locally. The atmosphere tends to form a positive Pacific-North American (PNA)-like pattern, and this anomalous atmospheric circulation and associated moisture advection lead to moister (drier) conditions in the western (eastern) United States. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51310
Appears in Collections: 气候变化事实与影响
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作者单位: Nelson Institute Center for Climatic Research, University of Wisconsin-Madison, Madison, WI, United States; Laboratory of Climate, Ocean, and Atmosphere Studies, Peking University, Beijing, China
Recommended Citation:
Wang F.,Notaro M.,Liu Z.,et al. Observed local and remote influences of vegetation on the atmosphere across North America using a model-validated statistical technique that first excludes oceanic forcings[J]. Journal of Climate,2014-01-01,27(1)