globalchange  > 气候减缓与适应
DOI: 10.1029/2018JD028684
Scopus记录号: 2-s2.0-85052218300
论文题名:
Transport of Central American Fire Emissions to the U.S. Gulf Coast: Climatological Pathways and Impacts on Ozone and PM2.5
作者: Wang S.-C.; Wang Y.; Estes M.; Lei R.; Talbot R.; Zhu L.; Hou P.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:15
起始页码: 8344
结束页码: 8361
语种: 英语
英文摘要: Fire emissions from Mexico and Central America are transported regularly to the U.S. Gulf Coast every spring under prevailing circulation patterns and affect U.S. air quality. Here we use a GEOS-Chem passive tracer simulation to develop the climatology of transport pathways of fire emissions over a long-term time period of April and May 2002–2015 and estimate their adverse air quality effects for urban areas along the Gulf Coast. A conceptual model is presented to describe the transport mechanisms, which involve southerly low-level jets in the lower troposphere and warm conveyor belt in the middle troposphere. The warm conveyor belts and the southerly low-level jets explain 31% and 69% of the interannual variability of the mid-altitude (1.5–6 km) and low-altitude events (0–1.5 km), respectively. Considering both transport and fire emissions, approximately 9% of the study period (59–88 days of 854 days) were identified as large pollution events during which Central American fire emissions adversely impacted surface air quality at several major urban centers along the Gulf Coast, including Houston and Corpus Christi in TX, New Orleans in LA, Mobile in AL, and Pensacola in FL. Compared to clean maritime flow from the Gulf of Mexico, these events were estimated to result in average enhancements of maximum daily average 8-hr (MDA8) ozone and daily PM2.5 (fine particulate matter <2.5 μm in diameter) in the Gulf Coast cities of 3–12 ppbv and 2–5 μg/m3, respectively. Only one ozone exceedance day (79 ppbv, on 18 May 2003) was found among the fire-impact days for the Houston region. ©2018. American Geophysical Union. All Rights Reserved.
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被引频次[WOS]:13   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113254
Appears in Collections:气候减缓与适应

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作者单位: Department of Earth and Atmospheric Science, University of Houston, Houston, TX, United States; Institute for Climate and Atmospheric Science, University of Houston, Houston, TX, United States; Texas Commission on Environmental Quality, Austin, TX, United States; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Atmospheric Sciences Program, Michigan Technological University, Houghton, MI, United States; Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI, United States

Recommended Citation:
Wang S.-C.,Wang Y.,Estes M.,et al. Transport of Central American Fire Emissions to the U.S. Gulf Coast: Climatological Pathways and Impacts on Ozone and PM2.5[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(15)
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