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Original Research Papers

Ground-based lidar measurements of aerosols during ACE-2: instrument description, results, and comparisons with other ground-based and airborne measurements

Authors:

Ellsworth J. Welton ,

University of Miami, Physics Department, 1320 Campo Sano Dr., Coral Gables, Fl 33143; Science Systems and Applications, Inc., NASA-GSFC Code 912, Greenbelt, MD 20771, US
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Kenneth J. Voss,

University of Miami, Physics Department, 1320 Campo Sano Dr., Coral Gables, Fl 33143, US
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Howard R. Gordon,

University of Miami, Physics Department, 1320 Campo Sano Dr., Coral Gables, Fl 33143, US
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Hal Maring,

RSMAS/MAC, University of Miami, 4600 Rickenbacker Causeway, Miami, Fl 33149, US
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Alexander Smirnov,

Science Systems and Applications, Inc., NASA-GSFC Code 923, Greenbelt, MD 20771, US
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Brent Holben,

Science Systems and Applications, Inc., NASA-GSFC Code 923, Greenbelt, MD 20771, US
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Beat Schmid,

Bay Area Environmental Research Institute, NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035-1000, US
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John M. Livingston,

SRI International, MS 245-5, NASA Ames Research Center, Moffett Field, CA 94035-1000, US
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Philip B. Russell,

SRI International, MS 245-5, NASA Ames Research Center, Moffett Field, CA 94035-1000, US
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Philip A. Durkee,

Meteorology Department, Code MR/DE, Naval Postgraduate School, 589 Dyer Rd., Monterey, CA 93943-5114, US
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Paola Formenti,

Max Planck Institut fur Chemie, Biogeochemistry Department, PO Box 3060, 55020 Mainz, DE
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Meinrat O. Andreae

Max Planck Institut fur Chemie, Biogeochemistry Department, PO Box 3060, 55020 Mainz, DE
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Abstract

A micro-pulse lidar system (MPL) was used to measure the vertical and horizontal distribution of aerosols during the Aerosol Characterization Experiment 2 (ACE-2) in June and July of 1997. The MPL measurements were made at the Izaña observatory (IZO), a weather station located on a mountain ridge (28°18’ N, 16°30’ W, 2367 m asl) near the center of the island of Tenerife, Canary Islands. The MPL was used to acquire aerosol backscatter, extinction, and optical depth profiles for normal background periods and periods influenced by Saharan dust from North Africa. System tests and calibration procedures are discussed, and an analysis of aerosol optical profiles acquired during ACE-2 is presented. MPL data taken during normal IZO conditions (no dust) showed that upslope aerosols appeared during the day and dissipated at night and that the layers were mostly confined to altitudes a few hundred meters above IZO. MPL data taken during a Saharan dust episode on 17 July showed that peak aerosol extinction values were an order of magnitude greater than molecular scattering over IZO, and that the dust layers extended to 5 km asl. The value of the dust backscatter−extinction ratio was determined to be 0.027±0.007 sr−1. Comparisons of the MPL data with data from other co-located instruments showed good agreement during the dust episode.

How to Cite: Welton, E.J., Voss, K.J., Gordon, H.R., Maring, H., Smirnov, A., Holben, B., Schmid, B., Livingston, J.M., Russell, P.B., Durkee, P.A., Formenti, P. and Andreae, M.O., 2000. Ground-based lidar measurements of aerosols during ACE-2: instrument description, results, and comparisons with other ground-based and airborne measurements. Tellus B: Chemical and Physical Meteorology, 52(2), pp.636–651. DOI: http://doi.org/10.3402/tellusb.v52i2.17124
  Published on 01 Jan 2000
 Accepted on 20 Sep 1999            Submitted on 1 Feb 1999

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