Fifteen-Year Global Time Series of Satellite-Derived Fine Particulate Matter

被引：203

作者：

Boys, B. L. ^{[1
]}

Martin, R. V. ^{[1
,2
]}

van Donkelaar, A. ^{[1
]}

MacDonell, R. J. ^{[1
]}

Hsu, N. C. ^{[3
]}

Cooper, M. J. ^{[1
]}

Yantosca, R. M. ^{[4
]}

Lu, Z. ^{[5
]}

Streets, D. G. ^{[5
]}

Zhang, Q. ^{[6
]}

Wang, S. W. ^{[6
]}

机构：

[1] Dalhousie Univ, Halifax, NS, Canada

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[4] Harvard Univ, Cambridge, MA 02138 USA

[5] Argonne Natl Lab, Argonne, IL 60439 USA

[6] Tsinghua Univ, Ctr Earth Syst Sci, Beijing 100084, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2014年 / 48卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LONG-TERM TREND; AEROSOL OPTICAL-THICKNESS; RIVER DELTA; CALIBRATION; VISIBILITY; CHINA; PM2.5; MISR; POLLUTION; MODIS;

D O I：

10.1021/es502113p

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ambient fine particulate matter (PM2.5) is a leading environmental risk factor for premature mortality. We use aerosol optical depth (AOD) retrieved from two satellite instruments, MISR and SeaWiFS, to produce a unified 15-year global time series (1998-2012) of ground-level PM2.5 concentration at a resolution of 1 degrees x 1 degrees. The GEOS-Chem chemical transport model (CTM) is used to relate each individual AOD retrieval to ground-level PM2.5. Four broad areas showing significant, spatially coherent, annual trends are examined in detail: the Eastern U.S. (-0.39 +/- 0.10 mu g m(-3) yr(-1)), the Arabian Peninsula (0.81 +/- 0.21 mu g m(-3) yr(-1)), South Asia (0.93 +/- 0.22 mu g m(-3) yr(-1)) and East Asia (0.79 +/- 0.27 mu g m(-3) yr(-1)). Over the period of dense in situ observation (1999-2012), the linear tendency for the Eastern U.S. (-0.37 +/- 0.13 mu g m(-3) yr(-1)) agrees well with that from in situ measurements (-0.38 +/- 0.06 mu g m(-3) yr(-1)). A GEOS-Chem simulation reveals that secondary inorganic aerosols largely explain the observed PM2.5 trend over the Eastern U.S., South Asia, and East Asia, while mineral dust largely explains the observed trend over the Arabian Peninsula.

引用

页码：11109 / 11118

页数：10

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