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DOI	10.5194/acp-20-139-2020
	Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003-2017
	Yu H.; Yang Y.; Wang H.; Tan Q.; Chin M.; Levy R.C.; Remer L.A.; Smith S.J.; Yuan T.; Shi Y.
发表日期	2020
ISSN	1680-7316
起始页码	139
结束页码	161
卷号	20 期号:1
英文摘要	Emissions and long-range transport of mineral dust and combustion-related aerosol from burning fossil fuels and biomass vary from year to year, driven by the evolution of the economy and changes in meteorological conditions and environmental regulations. This study offers both satellite and model perspectives on the interannual variability and possible trends of combustion aerosol and dust in major continental outflow regions over the past 15 years (2003-2017). The decade-long record of aerosol optical depth (AOD, denoted as τ), separately for combustion aerosol (τc) and dust (τd), over global oceans is derived from the Collection 6 aerosol products of the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard both Terra and Aqua. These MODIS Aqua datasets, complemented by aerosol source-tagged simulations using the Community Atmospheric Model version 5 (CAM5), are then analyzed to understand the interannual variability and potential trends of τc and τd in the major continental outflows. Both MODIS and CAM5 consistently yield a similar decreasing trend of -0.017 to -0.020 per decade for τc over the North Atlantic Ocean and the Mediterranean Sea that is attributable to reduced emissions from North America and Europe, respectively. On the contrary, both MODIS and CAM5 display an increasing trend of C0.017 to C0.036 per decade for τc over the tropical Indian Ocean, the Bay of Bengal, and the Arabian Sea, which reflects the influence of increased anthropogenic emissions from South Asia and the Middle East in the last 2 decades. Over the northwestern Pacific Ocean, which is often affected by East Asian emissions of pollution and dust, the MODIS retrievals show a decreasing trend of -0.021 per decade for τc and -0.012 per decade for τd, which is, however, not reproduced by the CAM5 model. In other outflow regions strongly influenced by biomass burning smoke or dust, both MODIS retrievals and CAM5 simulations show no statistically significant trends; the MODIS-observed interannual variability is usually larger than that of the CAM5 simulation. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; annual variation; biomass burning; combustion; computer simulation; dust; emission inventory; fuel consumption; long range transport; MODIS; numerical model; optical depth; pollutant transport; Arabian Sea; Bay of Bengal; Indian Ocean; Indian Ocean (Tropical); Middle East; Pacific Ocean; Pacific Ocean (Northwest); South Asia
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/248067
作者单位	Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Bay Area Environmental Research Institute, Petaluma, CA, United States; NASA Ames Research Center, Moffett Field, CA, United States; Joint Center for Earth Science and Technology, University of Maryland at Baltimore County, Baltimore, MD, United States
推荐引用方式 GB/T 7714	Yu H.,Yang Y.,Wang H.,et al. Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003-2017[J],2020,20(1).
APA	Yu H..,Yang Y..,Wang H..,Tan Q..,Chin M..,...&Shi Y..(2020).Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003-2017.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(1).
MLA	Yu H.,et al."Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003-2017".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.1(2020).