气候变化领域集成服务门户(CCPortal): Global distribution of Asian, Middle Eastern, and North Atrican dust simulated by CESM1/CAKMA

CCPortal

DOI	10.5194/acp-22-13659-2022
	Global distribution of Asian, Middle Eastern, and North Atrican dust simulated by CESM1/CAKMA
	Lian, Siying; Zhou, Luxi; Murphy, Daniel M.; Froyd, Karl D.; Toon, Owen B.; Yu, Pengfei
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13659
结束页码	13676
卷号	22 期号:20 页码:18
英文摘要	Dust aerosols affect the radiative and energy balance at local and global scales by scattering and absorbing sunlight and infrared light. A previous study suggests that dust size distribution is one of the major sources of uncertainty in modeling the dust global distribution. Climate models overestimate the fine dust (<= 5 mu m) by an order of magnitude, while underestimates of the coarse dust (>= 5 mu m) range between 0.5 to 1.5 orders of magnitude compared with the global observations. Here we improved the simulated size distribution of dust aerosol using a sectional aerosol model (Community Aerosol and Radiation Model for Atmospheres) coupled with the Community Earth System Model (CESM1/CARMA). Simulated dust mass size distributions peak at around 2-3 mu m in diameter and increase by 4 orders of magnitude from 0.1 to 2 mu m. Our model demonstrates that North African, Middle Eastern, and Asian dust accounts for similar to 59.7 %, 12.5 %, and 13.3 % of the global annual mean dust emissions, with the remaining 14.5 % originating from scattered smaller dust sources. The model dust vertical distributions are validated against the NASA Atmospheric Tomography (ATom) field campaign datasets. Both simulations and ATom in situ measurements during the ATom field campaign suggest that dust mass concentrations over the remote ocean drop by 2 to 3 orders of magnitude from the surface to the upper troposphere (200 hPa). Our model suggests that Asian dust contributes to more than 40 % of annual mean dust mass abundances in the global upper troposphere and lower stratosphere (UTLS). The model suggests that Asian dust dominates the dust mass budget in the UTLS of the Asian summer monsoon (ASM) region, with a relative contribution 1-2 orders of magnitude higher than the dust originating from the North African and Middle Eastern deserts.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000870780700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273390
作者单位	Jinan University; National Oceanic Atmospheric Admin (NOAA) - USA; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder
推荐引用方式 GB/T 7714	Lian, Siying,Zhou, Luxi,Murphy, Daniel M.,et al. Global distribution of Asian, Middle Eastern, and North Atrican dust simulated by CESM1/CAKMA[J],2022,22(20):18.
APA	Lian, Siying,Zhou, Luxi,Murphy, Daniel M.,Froyd, Karl D.,Toon, Owen B.,&Yu, Pengfei.(2022).Global distribution of Asian, Middle Eastern, and North Atrican dust simulated by CESM1/CAKMA.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),18.
MLA	Lian, Siying,et al."Global distribution of Asian, Middle Eastern, and North Atrican dust simulated by CESM1/CAKMA".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):18.