DOI: 10.1175/JCLI-D-13-00690.1
Scopus记录号: 2-s2.0-84903386106
论文题名: Remote vegetation feedbacks and the mid-Holocene green Sahara
作者: Swann A.L.S. ; Fung I.Y. ; Liu Y. ; Chiang J.C.H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 13 起始页码: 4857
结束页码: 4870
语种: 英语
Scopus关键词: Climate models
; Climatology
; Atmosphere-land interactions
; Atmospheric circulation
; Dynamical pattern
; Energy transport
; Intertropical convergence zone
; Teleconnections
; Vegetation feedbacks
; Vegetation-atmosphere interactions
; Vegetation
; air-soil interaction
; climate feedback
; climate modeling
; Holocene
; orbital forcing
; paleoclimate
; teleconnection
; vegetation dynamics
; Sahara
英文摘要: In the mid-Holocene, the climate of northern Africa was characterized by wetter conditions than present, as evidenced by higher paleolake levels and pollen assemblages of savannah vegetation suggesting a wetter, greener Sahara. Previous modeling studies have struggled to simulate sufficient amounts of precipitation when considering orbital forcing alone, with limited improvement from considering the effects of local grasslands. Here it is proposed that remote forcing from expanded forest cover in Eurasia relative to today is capable of shifting the intertropical convergence zone northward, resulting in an enhancement in precipitation over northern Africa approximately 6000 years ago greater than that resulting from orbital forcing and local vegetation alone. It is demonstrated that the remote and local forcing of atmospheric circulation by vegetation can lead to different dynamical patterns with consequences for precipitation across the globe. These ecoclimate teleconnections represent the linkages between the land surface in different regions of the globe and by inference show that proxy records of plant cover represent not only the response of vegetation to local climate but also that vegetation's influence on global climate patterns. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51054
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Atmospheric Sciences, Seattle, WA, United States; Department of Earth and Planetary Science, University of California, Berkeley, CA, United States; Department of Geography, University of California, Berkeley, CA, United States
Recommended Citation:
Swann A.L.S.,Fung I.Y.,Liu Y.,et al. Remote vegetation feedbacks and the mid-Holocene green Sahara[J]. Journal of Climate,2014-01-01,27(13)