globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.03.025
Scopus记录号: 2-s2.0-85045182933
论文题名:
Response of the Asian summer monsoons to idealized precession and obliquity forcing in a set of GCMs
作者: Bosmans J.H.C.; Erb M.P.; Dolan A.M.; Drijfhout S.S.; Tuenter E.; Hilgen F.J.; Edge D.; Pope J.O.; Lourens L.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 188
起始页码: 121
结束页码: 135
语种: 英语
英文关键词: Climate dynamics ; Monsoon ; Multi-model ; Orbital forcing ; Paleoclimate modelling ; South-east asia
Scopus关键词: Atmospheric thermodynamics ; Incident solar radiation ; Oceanography ; Orbits ; Tropics ; Climate dynamics ; Monsoon ; Multi model ; Orbital forcing ; Paleoclimate modelling ; Southeast Asia ; Climate models ; climate modeling ; general circulation model ; insolation ; land-sea interaction ; monsoon ; paleoclimate ; precipitation (climatology) ; pressure gradient ; proxy climate record ; Southern Hemisphere ; speleothem ; summer ; Far East ; India ; Indian Ocean ; Indian Ocean (Tropical) ; Indian Ocean (West) ; Pacific Ocean ; Pacific Ocean (Tropical) ; Southeast Asia
英文摘要: We examine the response of the Indian and East Asian summer monsoons to separate precession and obliquity forcing, using a set of fully coupled high-resolution models for the first time: EC-Earth, GFDL CM2.1, CESM and HadCM3. We focus on the effect of insolation changes on monsoon precipitation and underlying circulation changes, and find strong model agreement despite a range of model physics, parameterization, and resolution. Our results show increased summer monsoon precipitation at times of increased summer insolation, i.e. minimum precession and maximum obliquity, accompanied by a redistribution of precipitation and convection from ocean to land. Southerly monsoon winds over East Asia are strengthened as a consequence of an intensified land-sea pressure gradient. The response of the Indian summer monsoon is less straightforward. Over south-east Asia low surface pressure is less pronounced and winds over the northern Indian Ocean are directed more westward. An Indian Ocean Dipole pattern emerges, with increased precipitation and convection over the western Indian Ocean. Increased temperatures occur during minimum precession over the Indian Ocean, but not during maximum obliquity when insolation is reduced over the tropics and southern hemisphere during northern hemisphere summer. Evaporation is reduced over the northern Indian Ocean, which together with increased precipitation over the western Indian Ocean dampens the increase of monsoonal precipitation over the continent. The southern tropical Indian Ocean as well as the western tropical Pacific (for precession) act as a moisture source for enhanced monsoonal precipitation. The models are in closest agreement for precession-induced changes, with more model spread for obliquity-induced changes, possibly related to a smaller insolation forcing. Our results indicate that a direct response of the Indian and East Asian summer monsoons to insolation forcing is possible, in line with speleothem records but in contrast to what most marine proxy climate records suggest. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112213
Appears in Collections:气候减缓与适应

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作者单位: Utrecht University, Faculty of Geosciences, Postbus 80.115, 3508 TC, Utrecht, Netherlands; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, United States; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom; Royal Netherlands Meteorological Institute, Postbus 201, 3730 AE, De Bilt, Netherlands; Royal Netherlands Meteorological Institute, Postbus, 201, De Bilt, AE 3730, Netherlands; Department of Earth Sciences, University of Southern California, Los Angeles, California, United States; Institute for Geophysics, University of Texas at Austin, 10100 Burnet Road (R2200) Austin, Texas, TX 78758-4445, United States; University of Southampton, Ocean and Earth Sciences, Waterfront Campus (NOCS), European Way, Southampton, SO14 3ZH, United Kingdom; Utrecht University, Faculty of Science, Princetonplein 5, Utrecht, CC 3584, Netherlands; Utrecht University, Faculty of Geosciences, Postbus 80.115, Utrecht, TC 3508, Netherlands; British Antarctic Survey, Cambridge, United Kingdom

Recommended Citation:
Bosmans J.H.C.,Erb M.P.,Dolan A.M.,et al. Response of the Asian summer monsoons to idealized precession and obliquity forcing in a set of GCMs[J]. Quaternary Science Reviews,2018-01-01,188
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