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Ground-Based Lidar Measurements of Aerosols During ACE-2 Instrument Description, Results, and Comparisons with Other Ground-Based and Airborne MeasurementsA micro-pulse lidar system (MPL) was used to measure the vertical and horizontal distribution or aerosols during the Aerosol Characterization Experiment 2 (ACE-2) in June and July of 1997. The MPL measurements were made at the Izana observatory (IZO), a weather station located on a mountain ridge (28 deg 18'N, 16 deg 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 in 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 per sr. Comparisons of the MPL data with data from other co-located instruments showed good agreement during the dust episode.
Document ID
20000052526
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Welton, Ellsworth J.
(Miami Univ. Coral Gables, FL United States)
Voss, Kenneth J.
(Miami Univ. Coral Gables, FL United States)
Gordon, Howard R.
(Miami Univ. Coral Gables, FL United States)
Maring, Hal
(Miami Univ. FL United States)
Smirnov, Alexander
(Science Systems and Applications, Inc. Greenbelt, MD United States)
Holben, Brent
(Science Systems and Applications, Inc. Greenbelt, MD United States)
Schmid, Beat
(Bay Area Environmental Research Inst. San Francisco, CA United States)
Livingston, John M.
(SRI International Corp. Menlo Park, CA United States)
Russell, Philip B.
(SRI International Corp. Menlo Park, CA United States)
Durkee, Philip A.
(Naval Postgraduate School Monterey, CA United States)
Formenti, Paolo
(Max-Planck-Inst. fuer Chemie Mainz, Germany)
Date Acquired
August 19, 2013
Publication Date
February 28, 2000
Publication Information
Publication: Analysis of Atmospheric Aerosol Data Sets and Application of Radiative Transfer Models to Compute Aerosol Effects
Subject Category
Environment Pollution
Distribution Limits
Public
Copyright
Other

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