气候变化领域集成服务门户(CCPortal): Contrasting southern hemisphere monsoon response: MidHolocene orbital forcing versus future greenhouse gas-induced global warming

CCPortal

DOI	10.1175/JCLI-D-19-0672.1
	Contrasting southern hemisphere monsoon response: MidHolocene orbital forcing versus future greenhouse gas-induced global warming
	D'Agostino R.; Brown J.R.; Moise A.; Nguyen H.; Silva Dias P.L.; Jungclaus J.
发表日期	2020
ISSN	0894-8755
起始页码	9595
结束页码	9613
卷号	33 期号:22
英文摘要	Past changes of Southern Hemisphere (SH) monsoons are less investigated than their northern counterpart because of relatively scarce paleodata. In addition, projections of SH monsoons are less robust than in the Northern Hemisphere. Here, we use an energetic framework to shed lights on the mechanisms determining SH monsoonal response to external forcing: precession change at the mid-Holocene versus future greenhouse gas increase (RCP8.5). Mechanisms explaining the monsoon response are investigated by decomposing the moisture budget in thermodynamic and dynamic components. SH monsoons weaken and contract in the multimodel mean of midHolocene simulations as a result of decreased net energy input and weakening of the dynamic component. In contrast, SH monsoons strengthen and expand in the RCP8.5 multimodel mean, as a result of increased net energy input and strengthening of the thermodynamic component. However, important regional differences on monsoonal precipitation emerge from the local response of Hadley and Walker circulations. In the midHolocene, the combined effect of Walker-Hadley changes explains the landocean precipitation contrast. Conversely, the increased local gross moist stability explains the increased local precipitation and net energy input under circulation weakening in RCP8.5. © 2020 American Meteorological Society.
英文关键词	Budget control; Dynamics; Global warming; Greenhouse gases; Dynamic component; Monsoonal precipitation; Northern Hemispheres; Orbital forcing; Regional differences; Response to external forcing; Southern Hemisphere; Walker circulation; Atmospheric thermodynamics; atmospheric forcing; global warming; greenhouse gas; Hadley cell; Holocene; monsoon; orbital forcing; paleoclimate; Southern Hemisphere; Walker circulation
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171017
作者单位	Max Planck Institute for Meteorology, Hamburg, Germany; School of Earth Sciences, ARC Centre of Excellence for Climate Extremes, University of Melbourne, Melbourne, VIC, Australia; Bureau of Meteorology, Melbourne, VIC, Australia; Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo, São Paulo, Brazil; Max Planck Institute for Meteorology, Hamburg, Germany
推荐引用方式 GB/T 7714	D'Agostino R.,Brown J.R.,Moise A.,et al. Contrasting southern hemisphere monsoon response: MidHolocene orbital forcing versus future greenhouse gas-induced global warming[J],2020,33(22).
APA	D'Agostino R.,Brown J.R.,Moise A.,Nguyen H.,Silva Dias P.L.,&Jungclaus J..(2020).Contrasting southern hemisphere monsoon response: MidHolocene orbital forcing versus future greenhouse gas-induced global warming.Journal of Climate,33(22).
MLA	D'Agostino R.,et al."Contrasting southern hemisphere monsoon response: MidHolocene orbital forcing versus future greenhouse gas-induced global warming".Journal of Climate 33.22(2020).