气候变化领域集成服务门户(CCPortal): AMOC and Climate Responses to Dust Reduction and Greening of the Sahara during the Mid-Holocene

CCPortal

DOI	10.1175/JCLI-D-20-0628.1
	AMOC and Climate Responses to Dust Reduction and Greening of the Sahara during the Mid-Holocene
	Zhang, Ming; Liu, Yonggang; Zhang, Jian; Wen, Qin
通讯作者	Liu, YG (通讯作者)
发表日期	2021
ISSN	0894-8755
EISSN	1520-0442
起始页码	4893
结束页码	4912
卷号	34 期号:12
英文摘要	North Africa was green during the mid-Holocene [about 6000 years ago (6 ka)] and emitted much less dust to the atmosphere than in the present day. Here we use a fully coupled atmosphere-ocean general circulation model, CESM1.2.2, to test the impact of dust reduction and greening of the Sahara on the Atlantic meridional overturning circulation (AMOC) during this period. Results show that dust removal leads to a decrease of AMOC by 6.2% while greening of the Sahara with 100% shrub (100% grass) cover causes an enhancement of the AMOC by 6.1% (4.8%). The AMOC is increased by 5.3% (2.3%) when both the dust reduction and green Sahara with 100% shrub (100% grass) are considered. The AMOC changes are primarily due to the precipitation change over the west subtropical North Atlantic, from where the salinity anomaly is advected to the deep-water formation region. Global-mean surface temperature increases by 0.09 degrees and 0.40 degrees C (0.25 degrees C) when global dust is removed and when North Africa and the Arabian region are covered by shrub (grass), respectively, showing a dominating effect of vegetation over dust. The comparison between modeled and reconstructed sea surface temperature is improved when the effect of vegetation is considered. The results may have implications for climate impact of future wetting over North Africa, either through global warming or through building of solar farms and wind farms.
关键词	NORTH-ATLANTIC OCEAN GLOBAL TEMPERATURE ARABIAN PENINSULA AFRICAN MONSOON SURFACE ALBEDO HOLOCENE CIRCULATION MODEL IMPACT TERMINATION
英文关键词	Paleoclimate; Meridional overturning circulation; Dust or dust storms; Vegetation
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000655123900014
来源期刊	JOURNAL OF CLIMATE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260391
推荐引用方式 GB/T 7714	Zhang, Ming,Liu, Yonggang,Zhang, Jian,et al. AMOC and Climate Responses to Dust Reduction and Greening of the Sahara during the Mid-Holocene[J]. 中国科学院青藏高原研究所,2021,34(12).
APA	Zhang, Ming,Liu, Yonggang,Zhang, Jian,&Wen, Qin.(2021).AMOC and Climate Responses to Dust Reduction and Greening of the Sahara during the Mid-Holocene.JOURNAL OF CLIMATE,34(12).
MLA	Zhang, Ming,et al."AMOC and Climate Responses to Dust Reduction and Greening of the Sahara during the Mid-Holocene".JOURNAL OF CLIMATE 34.12(2021).