干旱区生态环境知识资源中心(Arid): Deforestation Strengthens Atmospheric Transport of Mineral Dust and Phosphorus from North Africa to the Amazon

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DOI	10.1175/JCLI-D-20-0786.1
	Deforestation Strengthens Atmospheric Transport of Mineral Dust and Phosphorus from North Africa to the Amazon
	Li, Yue; Randerson, James T.; Mahowald, Natalie M.; Lawrence, Peter J.
通讯作者	Li, Y (corresponding author), Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA.
来源期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
EISSN	1520-0442
出版年	2021
卷号	34 期号:15 页码:6087-6096
英文摘要	Phosphorus contained in atmospheric mineral dust aerosol originating from Africa fertilizes tropical forests in Amazonia. However, the mechanisms influencing this nutrient transport pathway remain poorly understood. Here we use the Community Earth System Model to investigate how large-scale deforestation affects mineral dust aerosol transport and deposition in the tropics. We find that the surface biophysical changes that accompany deforestation produce a warmer, drier, and windier surface environment that perturbs atmospheric circulation and enhances long-range dust transport from North Africa to the Amazon. Tropics-wide deforestation weakens the Hadley circulation, which then leads to a northward expansion of the Hadley cell and increases surface air pressure over the Sahara Desert. The high pressure anomaly over the Sahara, in turn, increases northeasterly winds across North Africa and the tropical North Atlantic Ocean, which subsequently increases dust transport to the South American continent. We estimate that the annual atmospheric phosphorus deposition from dust significantly increases by 27% (P < 0.01) in the Amazon under a scenario of complete deforestation. These interactions exemplify how land surface changes can modify tropical nutrient cycling, which, in turn, may have consequences for long-term changes in tropical ecosystem productivity and biodiversity.
英文关键词	Amazon region Tropics Hadley circulation Aerosols Deforestation Dust or dust storms
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000672642500004
WOS关键词	LAND-USE CHANGE ; SURFACE-TEMPERATURE ; CLIMATE ; IMPACT ; CIRCULATION ; EMISSIONS ; BOUNDARY ; FORESTS ; VERSION ; TRENDS
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363814
作者单位	[Li, Yue; Randerson, James T.] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA; [Mahowald, Natalie M.] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY USA; [Lawrence, Peter J.] Natl Ctr Atmospher Res, Climate & Global Dynam Lab, POB 3000, Boulder, CO 80307 USA
推荐引用方式 GB/T 7714	Li, Yue,Randerson, James T.,Mahowald, Natalie M.,et al. Deforestation Strengthens Atmospheric Transport of Mineral Dust and Phosphorus from North Africa to the Amazon[J],2021,34(15):6087-6096.
APA	Li, Yue,Randerson, James T.,Mahowald, Natalie M.,&Lawrence, Peter J..(2021).Deforestation Strengthens Atmospheric Transport of Mineral Dust and Phosphorus from North Africa to the Amazon.JOURNAL OF CLIMATE,34(15),6087-6096.
MLA	Li, Yue,et al."Deforestation Strengthens Atmospheric Transport of Mineral Dust and Phosphorus from North Africa to the Amazon".JOURNAL OF CLIMATE 34.15(2021):6087-6096.