DOI: 10.1007/s00382-011-1216-9
Scopus记录号: 2-s2.0-84867096800
论文题名: SST and ice sheet impacts on the MIS-13 climate
作者: Muri H. ; Berger A. ; Yin Q. ; Voldoire A. ; Mélia D.S.Y. ; Sundaram S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-07-08 起始页码: 1739
结束页码: 1761
语种: 英语
英文关键词: GCM
; Ice sheets
; insolation
; MIS-13
; Monsoon
; SST
英文摘要: As a first qualitative assessment tool, LOVECLIM has been used to investigate the interactions between insolation, ice sheets and the East Asian Monsoon at the Marine Isotopic Stage 13 (MIS-13) in work by Yin et al. (Clim Past 4:79-90, 2008, Clim Past 5:229-243, 2009). The results are in need of validation with a more sophisticated model, which is done in this work with the ARPEGE atmospheric general circulation model. As in the Earth system Model of Intermediate Complexity, LOVECLIM, ARPEGE shows that the northern hemispheric high insolation in summer leads to strong MIS-13 monsoon precipitation. Data from the Chinese Loess Plateau indicate that MIS-13 was locally a warm and humid period (Guo et al. in Clim Past 5:21-31, 2009; Yin and Guo in Chin Sci Bull 51(2):213-220, 2006). This is confirmed by these General Circulation Model (GCM) results, where the MIS-13 climate is found to be hotter and more humid both in the presence and absence of any added ice sheets. LOVECLIM found that the combined effects of the ice sheets and their accompanying SSTs contribute to more precipitation in eastern China, whilst in ARPEGE the impact is significant in northeastern China. Nonetheless the results of ARPEGE confirm the counter-intuitive results of LOVECLIM where ice sheets contribute to enhance monsoon precipitation. This happens through a topography induced wave propagating through Eurasia with an ascending branch over northeastern China. A feature which is also seen in LOVECLIM. The SST forcing in ARPEGE results in a strong zonal temperature gradient between the North Atlantic and east Eurasia, which in turn triggers an atmospheric gravity wave. This wave induces a blocking Okhotskian high, preventing the northwards penetration of the Meiyu monsoon front. The synergism between the ice sheets and SST is found through the factor separation method, yielding an increase in the Meiyu precipitation, though a reduction of the Changma precipitation. The synergism between the ice sheets and SST play a non-negligible role and should be taken into consideration in GCM studies. Preliminary fully coupled AOGCM results presented here further substantiate the finding of stronger MIS-13 monsoons and a reinforcement from ice sheets. This work increases our understanding of the signals found in the paleo-observations and the dynamics of the complex East Asian Summer Monsoon. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55151
Appears in Collections: 过去全球变化的重建
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作者单位: Georges Lemaitre Centre for Earth and Climate Research (TECLIM), Earth and Life Institute (ELI), Université catholique de Louvain, 2 Chemin du Cyclotron, 1348 Louvain la Neuve, Belgium; CNRM-GAME Météo-France/CNRS, 42, Avenue Coriolis, 31057 Toulouse Cedex, France
Recommended Citation:
Muri H.,Berger A.,Yin Q.,et al. SST and ice sheet impacts on the MIS-13 climate[J]. Climate Dynamics,2012-01-01,39(2017-07-08)