The objectives are: to analyze dual polarization lidar measurements of aerosols and polar stratospheric clouds (PSCs) obtained aboard the NASA Ames DC-8 aircraft during the 1989 Airborne Arctic Stratospheric Expedition (AASE); and to combine lidar, SAM II, and other AASE data with theoretical modeling calculations to study PSC characteristics. A summary of progress and results is given

Mccormick, M. Patrick

Poole, Lamont R.

English

NASA Technical Reports Server

A. TITLE OF RESEARCH TASK:
N92-14519 J.i
Airborne Aerosol Lidar (RTOP 147-14-34-79)
B. INVESTIGATORS: Lamont R. Poole and M. Patrick McCormick
Atmospheric Sciences Division
NASA Langley Research Center
Hampton, VA 23665
C. ABSTRACT. The objectives of this research are: (1) to analyze dual-
polarization lidar measurements of aerosols and polar stratospheric
clouds (PSCs) obtained aboard the NASA Ames DC-8 aircraft during
the 1989 Airborne Arctic Stratospheric Expedition (AASE); and (2)
to combine lidar, SAM II, and other AASE data with theoretical
modeling calculations to investigate PSC characteristics.
D. SUMMARY OF PROGRESS AND RESULTS. The Langley dual-polarization
aerosol lidar system was successfully integrated aboard the _mes
DC-8, and measurements of stratospheric aerosols and PSCs were
obtained on all AASE flights (14 Arctic missions and 2 ferry
flights). In addition, aerosol and PSC measurements made during
AASE by the satellite-borne SAM II sensor were transmitted daily
(in both graphical and digital form) to the experiment site in
Stavanger, Norway, to assist in mission planning. Final analysis
and archival of the AASE SAM II data were completed in April 1989.
Preliminary analysis of lidar data from all AASE Arctic missions
has been completed, and follow-on studies of 4 Arctic missions are
currently in progress. Comparisons of opportunity have been made
between AASE lidar and SAM II measurements to study the spatial and
temporal variability of PSC properties. A conceptual model for
generic classification of the dual-polarization lidar observations
has been developed and is being used with theoretical calculations
and available meteorological data to investigate PSC formation and
growth mechanisms. PSCs were also observed over Northern Europe
(near latitude 50N) from Jan. 31-Feb. 2, 1989, by the spaceborne
SAGE II sensor; analysis of these multi-wavelength PSC extinction
data is in progress. Manuscripts are in preparation (for the AASE
special issue of Geophysical Research Letters) to present the lidar
and SAM II observations and their comparisons of opportunity, the
conceptual lidar data classification model, and the SAGE II PSC
observations.
E. JOURNAL PUBLICATIONS. None (manuscripts in preparation)
106
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Airborne aerosol lidar

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