DOI: 10.1016/j.quascirev.2016.11.028
Scopus记录号: 2-s2.0-85002487039
论文题名: Qualitative assessment of PMIP3 rainfall simulations across the eastern African monsoon domains during the mid-Holocene and the Last Glacial Maximum
作者: Chevalier M. ; Brewer S. ; Chase B.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 156 起始页码: 107
结束页码: 120
语种: 英语
英文关键词: Africa
; Data-model comparison
; Intertropical convergence zone
; Last Glacial Maximum
; Mid-Holocene
; Monsoon
; Palaeoclimate
; PMIP3
; Southern hemisphere
Scopus关键词: Glacial geology
; Rain
; Africa
; Holocenes
; Intertropical convergence zone
; Last Glacial Maximum
; Model comparison
; Monsoon
; Palaeoclimate
; PMIP3
; Southern Hemisphere
; Atmospheric thermodynamics
; convection
; general circulation model
; Holocene
; insolation
; intertropical convergence zone
; Last Glacial Maximum
; paleoclimate
; precipitation assessment
; qualitative analysis
; seasonal variation
; simulation
; Southern Hemisphere
; Walker circulation
; Africa
; Indian Ocean
; Pacific Ocean
英文摘要: In this paper we compare a compilation of multiproxy records spanning the eastern African margin with general circulation model simulations of seasonal precipitation fields for the mid-Holocene and the Last Glacial Maximum (LGM) carried out as part of the third phase of the Paleoclimate Modelling Intercomparison Project (PMIP3). Results show good agreement during the mid-Holocene (the ‘6K experiment’), with palaeodata and model outputs correlating well and indicating that changes in insolation drove a stronger northern African monsoon (north of ∼0–5°S) during the terminal “African Humid Period” and a weaker southeast African monsoon. For the LGM (the ‘21K experiment’), however, significant discrepancies exist both between model simulations, and between existing palaeodata and simulated conditions, both in terms of direction and amplitude of change. None of the PMIP3 simulations reflect the pattern inferred from the palaeodata. Two major discrepancies have been identified to explain this: 1) the limited sensitivity of the southern monsoon domain to the colder temperatures of the Indian Ocean (−2 °C), and 2) the absence of changes in the dynamic of the Indian Ocean Walker circulation over the entire basin, despite the exposure of the Sahul and Sunda shelves that weakened convection over the Indo-Pacific Warm Pool during the LGM. These results indicate that some major features of the atmospheric and oceanic teleconnections between the different monsoon regions require further consideration as models evolve. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59343
Appears in Collections: 过去全球变化的重建
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作者单位: Centre National de la Recherche Scientifique, UMR 5554, Institut des Sciences de l'Evolution de Montpellier, Université de Montpellier, Bat. 22 CC061, Place Eugène Bataillon, Montpellier, Cedex 5, France; Geography Department, University of Utah, Salt Lake City, United States
Recommended Citation:
Chevalier M.,Brewer S.,Chase B.M.. Qualitative assessment of PMIP3 rainfall simulations across the eastern African monsoon domains during the mid-Holocene and the Last Glacial Maximum[J]. Quaternary Science Reviews,2017-01-01,156