globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025472
论文题名:
What factors control the trend of increasing AAOD over the United States in the last decade?
作者: Zhang L.; Henze D.K.; Grell G.A.; Torres O.; Jethva H.; Lamsal L.N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期:3
起始页码: 1797
结束页码: 1810
语种: 英语
英文关键词: OMI AAOD ; positive trend
Scopus关键词: aerosol ; biomass burning ; black carbon ; concentration (composition) ; control system ; decadal variation ; optical depth ; precipitation (climatology) ; spatiotemporal analysis ; trend analysis ; United States
英文摘要: We examine the spatial and temporal trends of absorbing aerosol optical depth (AAOD) in the last decade over the United States (U.S.) observed by the Ozone Monitoring Instrument (OMI). Monthly average OMI AAOD has increased over broad areas of the central U.S. from 2005 to 2015, by up to a factor of 4 in some grid cells (~60 km resolution). The AAOD increases in all seasons, although the percentage increases are larger in summer (June-July-August) than in winter (December-January-February) by a factor of 3. Despite enhancements in AAOD, OMI AOD exhibits insignificant trend over most of the U.S. except parts of the central and western U.S., the latter which may partly be due to decreases in precipitation. Trends in AAOD contrast with declining trends in surface concentrations of black carbon (BC) aerosol. Interannual variability of local biomass burning emissions of BC may contribute to the positive trend in AAOD over the western U.S. Changes in both dust aerosol measured at the surface (in terms of concentration and size) and dust AAOD indicate distinct enhancements, especially over the central U.S. by 50–100%, which appears to be one of the major factors that impacts positive trends in AAOD. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: NNX15AC30G ; RD-83503701-0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62696
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, United States; Global Systems Division, Earth System Research Laboratory, NOAA, Boulder, CO, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; GESTAR/University Space Research Association, NASA Goddard Space Flight Center, Greenbelt, MD, United States

Recommended Citation:
Zhang L.,Henze D.K.,Grell G.A.,et al. What factors control the trend of increasing AAOD over the United States in the last decade?[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)
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