Impact of Dust on Climate and AMOC During the Last Glacial Maximum Simulated by CESM1.2

被引：9

作者：

Zhang, Ming ^{[1
]}

Liu, Yonggang ^{[1
]}

Zhu, Jiang ^{[2
]}

Wang, Zhuoqun ^{[1
]}

Liu, Zhengyu ^{[3
]}

机构：

[1] Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing, Peoples R China

[2] Natl Ctr Atmospher Res, Climate & Global Dynam Lab, POB 3000, Boulder, CO 80307 USA

[3] Ohio State Univ, Dept Geog, Atmospher Sci Program, Columbus, OH 43210 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 03期

关键词：

dust; Last glacial maximum; AMOC; snow darkening effect; sea ice; MERIDIONAL OVERTURNING CIRCULATION; GREEN SAHARA; SENSITIVITY; MONSOON; OCEAN; TEMPERATURE; REDUCTION; RESPONSES; AEROSOL; ONSET;

D O I：

10.1029/2021GL096672

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

While the impact of dust on climate and Atlantic Meridional Overturning Circulation (AMOC) during the interglacial period such as the mid-Holocene has been studied extensively, its impact during the glacial period is unclear. Here we investigate how the climate and AMOC would change if there had been no dust during the Last Glacial Maximum. Model simulations show that the dust removal leads to a global cooling of over 2.4 degrees C and a weakening of AMOC by similar to 30%. Such temperature change is opposite in sign to that for the MH. The cooling is attributed to the increase of snow and ice albedo and weakening of AMOC when dust is removed, and is amplified through a positive feedback between sea ice and AMOC. Our results indicate that the climate and AMOC are more sensitive to dust change during the glacial than the interglacial period.

引用

页数：10

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