气候变化领域集成服务门户(CCPortal): Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial-Interglacial Cycles

CCPortal

DOI	10.1029/2020GL087948
	Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial-Interglacial Cycles
	Hou A.; Bahr A.; Raddatz J.; Voigt S.; Greule M.; Albuquerque A.L.; Chiessi C.M.; Friedrich O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Precipitation extremes with devastating socioeconomic consequences within the South American Monsoon System (SAMS) are expected to become more frequent in the near future. The complexity in SAMS behavior, however, poses severe challenges for reliable future projections. Thus, robust paleomonsoon records are needed to constrain the high spatiotemporal variability in the response of SAMS rainfall to different climatic drivers. This study uses Ti/Ca ratios from X-ray fluorescence scanning of a sediment core retrieved off eastern Brazilian to trace precipitation changes over the past 322 Kyr. The results indicate that despite the spatiotemporal complexity of the SAMS, insolation forcing is the primary pacemaker of variations in the monsoonal system. Additional modulation by atmospheric pCO2 suggests that SAMS intensity over eastern Brazil will be suppressed by rising CO2 emissions in the future. Lastly, our record reveals an unprecedented strong and persistent wet period during Marine Isotope Stage 6 driven by anomalously strong trade winds. ©2020. The Authors.
英文关键词	Glacial geology; Greenhouse gases; Incident solar radiation; Glacial-interglacial cycles; Greenhouse-gas forcing; Marine isotope stages; Precipitation change; Precipitation extremes; Socio-economic consequences; Spatio-temporal complexity; Spatiotemporal variability; Atmospheric thermodynamics; carbon dioxide; carbon emission; complexity; extreme event; future prospect; glacial-interglacial cycle; greenhouse gas; monsoon; precipitation (chemistry); sediment core; socioeconomic conditions; spatiotemporal analysis; Brazil
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170108
作者单位	Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany; Institute of Geosciences, Goethe University Frankfurt, Frankfurt, Germany; Programa de Geociências (Geoquímica), Universidade Federal Fluminense, Niterói, Brazil; School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, Brazil
推荐引用方式 GB/T 7714	Hou A.,Bahr A.,Raddatz J.,et al. Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial-Interglacial Cycles[J],2020,47(14).
APA	Hou A..,Bahr A..,Raddatz J..,Voigt S..,Greule M..,...&Friedrich O..(2020).Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial-Interglacial Cycles.Geophysical Research Letters,47(14).
MLA	Hou A.,et al."Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial-Interglacial Cycles".Geophysical Research Letters 47.14(2020).