First ISCCP Regional Experiment (FIRE) Atlantic Stratocumulus Transition Experiment (ASTEX) University of Washington C-131A 1Hz Data (FIRE_AX_UW_GERB_1HZ)Entry ID: FIRE_AX_UW_GERB_1HZ
Abstract: The First ISCCP Regional Experiments have been designed to improve
data products and cloud/radiation parameterizations used in general
circulation models (GCMs). Specifically, the goals of FIRE are (1) to
improve the basic understanding of the interaction of physical
processes in determining life cycles of cirrus and marine
stratocumulus systems and the radiative ... properties of these clouds
during their life cycles and (2) to investigate the interrelationships
between the ISCCP data, GCM parameterizations, and higher space and
time resolution cloud data.
To-date, four intensive field-observation periods were planned and
executed: a cirrus IFO (October 13 - November 2, 1986); a marine
stratocumulus IFO off the southwestern coast of California (June 29 -
July 20, 1987); a second cirrus IFO in southeastern Kansas (November
13 - December 7, 1991); and a second marine stratocumulus IFO in the
eastern North Atlantic Ocean (June 1 - June 28, 1992). Each mission
combined coordinated satellite, airborne, and surface observations
with modeling studies to investigate the cloud properties and physical
processes of the cloud systems.
The development of parameterizations requires an understanding of the
processes that generate, maintain, and dissipate boundary layer
clouds. This development is currently impeded by lack of understanding
of the transition from stratocumulus clouds to trade cumulus clouds
and the factors that control cloud type and amount in the boundary
layer. The Atlantic Stratocumulus Transition EXperiment (ASTEX) was
designed to address key issues related to stratocumulus to trade
cumulus transition and mode selection. ASTEX involved intensive
measurements from several platforms operating from 1-28 June 1992 in
the area of the Azores and Madeira Islands. The purpose was to study
how the transition and mode selection are effected by 1) cloud-top
entrainment instability, 2) diurnal decoupling and clearing due to
solar absorption, 3) patchy drizzle and a transition to horizontally
inhomogeneous clouds through decoupling, 4) mesoscale variability in
cloud thickness and associated mesoscale circulations, and 5) episodic
strong subsidence lowering the inversion below the LCL. Detailed
descriptions of the scientific goals of ASTEX are in the FIRE Phase
II: Research plan (1989) and in the ASTEX Operations Plan (1992).
This ASCII formatted data set includes data collected aboard the
University of Washington's Corsair 131A airplane. The cloud
microphysics probe (PVM-100A) was used to gather data on cloud liquid
water content, particle surface area, and effective droplet radius.
Please refer to the reference authored by H. Gerber to obtain
information on how the raw data were reduced to produce this data set.
(Click for Interactive Map)
Start Date: 1992-06-02Stop Date: 1992-06-26
ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES
ATMOSPHERE > AEROSOLS > PARTICULATE MATTER > PARTICLE SURFACE AREA
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD LIQUID WATER/ICE
ATMOSPHERE > CLOUDS > CLOUD TYPES
ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD DROPLET CONCENTRATION/SIZE > EFFECTIVE DROPLET RADIUS
ISO Topic Category
Distribution Media: Electronic
Role: SERF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
Role: TECHNICAL CONTACT
Email: ldi at gmu.edu
Center for Spatial Information Science and Systems George Mason University 4400 University Drive, MSN 6E1 George Mason University
Province or State: VA
Postal Code: 22032
Asrar, Ghassem and Reynold Greenstone, MTPE EOS Reference Handbook. Maryland,
US: NASA/Goddard Space Flight Center, 1995.
ESRI, Understanding GIS--The ARC/INFO Method. Cambridge, United Kingdom, UK:
GeoInformation International, 1997.
Klein, Larry, David Wynne, Doug Ilg, Joel Gales and Raj Gejjagaraguppe, HDF-EOS
Library User's Guide for the ECS Project. Maryland, US: Raytheon Information
Technology Systems, 1997.
Wharton, Stephen W. and Monica Faeth Myers, MTPE EOS Data Products Handbook.
Maryland, US: NASA/Goddard Space Flight Center, 1997.
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