DOI: 10.1002/2015GL066318
论文题名: The role of fall season tropical plumes in enhancing Saharan rainfall during the African Humid Period
作者: Skinner C.B. ; Poulsen C.J.
刊名: Geophysical Research Letters
ISSN: 0094-9533
EISSN: 1944-9264
出版年: 2016
卷: 43, 期: 1 起始页码: 349
结束页码: 358
语种: 英语
英文关键词: African Humid Period
; climate model
; fall season tropical plumes
Scopus关键词: Climate models
; Hierarchical systems
; Moisture
; Rain
; Community atmosphere model
; Early Holocene
; Extratropical
; Holocene climate
; Humid periods
; Rainy seasons
; Summer monsoon
; Tropical plume
; Tropics
英文摘要: The early Holocene to mid-Holocene African Humid Period (AHP) is marked by widespread rainfall throughout the present-day arid Sahara. Here we simulate early Holocene and mid-Holocene climate with the Community Atmosphere Model version 5 to explore the role of fall season dynamics in driving Saharan rainfall during the AHP. An enhanced summer monsoon during the AHP results in abundant fall season moisture throughout tropical Africa, particularly during the mid-Holocene. During the fall, extratropical troughs advect tropical moisture toward the Sahara in the form of concentrated plumes of water vapor and extend the Saharan rainy season into October. Fall season tropical plumes contribute up to 30% of annual Saharan rainfall during the mid-Holocene. Our results suggest that tropical plumes serve as an important mechanism for enhancing Saharan rainfall during the late AHP and that further understanding of changes in tropical plumes through time may provide valuable insights into past African hydroclimate change. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956589537&doi=10.1002%2f2015GL066318&partnerID=40&md5=2d1a58ea001763e24e2273fcaadc095d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10496
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States
Recommended Citation:
Skinner C.B.,Poulsen C.J.. The role of fall season tropical plumes in enhancing Saharan rainfall during the African Humid Period[J]. Geophysical Research Letters,2016-01-01,43(1).