DOI: 10.1016/j.quascirev.2015.08.033
Scopus记录号: 2-s2.0-84941102208
论文题名: The concept of global monsoon applied to the last glacial maximum: A multi-model analysis
作者: Jiang D. ; Tian Z. ; Lang X. ; Kageyama M. ; Ramstein G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 126 起始页码: 126
结束页码: 139
语种: 英语
英文关键词: Global monsoon
; Last glacial maximum
; PMIP
; Simulation
Scopus关键词: Climate models
; Glacial geology
; Greenhouse gases
; Oceanography
; Repair
; Global monsoon
; Land-sea thermal contrasts
; Last Glacial Maximum
; Meridional temperature gradient
; Paleoclimate modelling
; PMIP
; Simulation
; Tropospheric temperature
; Atmospheric thermodynamics
; climate modeling
; concentration (composition)
; greenhouse gas
; ice sheet
; land-sea interaction
; Last Glacial Maximum
; monsoon
; precipitation intensity
; temperature gradient
; Australia
; South Africa
; South America
英文摘要: The last glacial maximum (LGM, ca. 21,000 years ago) has been extensively investigated for better understanding of past glacial climates. Global-scale monsoon changes, however, have not yet been determined. In this study, we examine global monsoon area (GMA) and precipitation (GMP) as well as GMP intensity (GMPI) at the LGM using the experiments of 17 climate models chosen from the Paleoclimate Modelling Intercomparison Project (PMIP) according to their ability to reproduce the present global monsoon climate. Compared to the reference period (referring to the present day, ca. 1985, for three atmospheric plus two atm-slab ocean models and the pre-industrial period, ca. 1750, for 12 fully coupled atmosphere-ocean or atmosphere-ocean-vegetation models), the LGM monsoon area increased over land and decreased over the oceans. The boreal land monsoon areas generally shifted southward, while the northern boundary of land monsoon areas retreated southward over southern Africa and South America. Both the LGM GMP and GMPI decreased in most of the models. The GMP decrease mainly resulted from the reduced monsoon precipitation over the oceans, while the GMPI decrease was derived from the weakened intensity of monsoon precipitation over land and the boreal ocean. Quantitatively, the LGM GMP deficit was due to, first, the GMA reduction and, second, the GMPI weakening. In response to the LGM large ice sheets and lower greenhouse gas concentrations in the atmosphere, the global surface and tropospheric temperatures cooled, the boreal summer meridional temperature gradient increased, and the summer land-sea thermal contrast at 40°S - 70°N decreased. These are the underlying dynamic mechanisms for the LGM monsoon changes. Qualitatively, simulations agree with reconstructions in all land monsoon areas except in the western part of northern Australia where disagreements occur and in South America and the southern part of southern Africa where there is uncertainty in reconstructions. Simulations do not support an inter-hemispheric anti-phasing of monsoon intensity change as suggested by proxy data. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59827
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology (NUIST), Nanjing, China; LSCE/IPSL, UMR CEA-CNRS-UVSQ 8212, CE Saclay, L'Orme des Merisiers, Bâtiment 701, Gif-sur-Yvette Cedex, France; Joint Center for Global Change Studies, Beijing, China
Recommended Citation:
Jiang D.,Tian Z.,Lang X.,et al. The concept of global monsoon applied to the last glacial maximum: A multi-model analysis[J]. Quaternary Science Reviews,2015-01-01,126