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Title: Lidar Measurements of the Vertical Distribution of Aerosol Optical and Physical Properties over Central Asia

The vertical structure of aerosol optical and physical properties was measured by Lidar in Eastern Kyrgyzstan, Central Asia, from June 2008 to May 2009. Lidar measurements were supplemented with surface-based measurements of PM 2.5 and PM 10 mass and chemical composition in both size fractions. Dust transported into the region is common, being detected 33% of the time. The maximum frequency occurred in the spring of 2009. Dust transported to Central Asia comes from regional sources, for example, Taklimakan desert and Aral Sea basin, and from long-range transport, for example, deserts of Arabia, Northeast Africa, Iran, and Pakistan. Regional sources are characterized by pollution transport with maximum values of coarse particles within the planetary boundary layer, aerosol optical thickness, extinction coefficient, integral coefficient of aerosol backscatter, and minimum values of the Ångström exponent. Pollution associated with air masses transported over long distances has different characteristics during autumn, winter, and spring. During winter, dust emissions were low resulting in high values of the Ångström exponent (about 0.51) and the fine particle mass fraction (64%). Dust storms were more frequent during spring with an increase in coarse dust particles in comparison to winter. The aerosol vertical profiles can be used tomore » lower uncertainty in estimating radiative forcing.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5] ;  [6]
  1. Kyrgyz-Russian Slavic University, 44 Kievskaya Street, 720000 Bishkek, Kyrgyzstan
  2. Office of Research and Development, U.S. EPA, 944 E. Harmon Avenue, Las Vegas, NV 89119, USA
  3. Office of Radiation and Indoor Air, U.S. EPA, 944 E. Harmon Avenue, Las Vegas, NV 89119, USA
  4. University of Wisconsin, Wisconsin State Laboratory of Hygiene, 660 North Park Street, Madison, WI 53706, USA
  5. Institute of Atmospheric Physics, Moscow 109017, Russia
  6. Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA 52242, USA
Publication Date:
OSTI Identifier:
1198080
Type:
Published Article
Journal Name:
International Journal of Atmospheric Sciences
Additional Journal Information:
Journal Volume: 2013; Related Information: CHORUS Timestamp: 2016-07-30 07:31:14; Journal ID: ISSN 2314-4122
Publisher:
Hindawi Publishing Corporation
Sponsoring Org:
USDOE
Country of Publication:
Country unknown/Code not available
Language:
English