Between June 3 and June 30, 2007, the NASA Langley Research Center
High Spectral Resolution Lidar (HSRL) team will participate in the
Cumulus Humilis Aerosol Processing Study (CHAPS), which is sponsored
by the Department of Energy (DOE) Atmospheric Science Program (ASP).
This field experiment will be conducted in the vicinity of Oklahoma City, OK.
CHAPS is designed to examine the influence of anthropogenic aerosols
from a mid-size urban area on the microphysics of cumuliform clouds
and the effects these clouds have on urban aerosols that pass through
fields of fair weather cumulus (FWC). The resulting observations will be
used to address a number of basic scientific processes associated with
the effects of aerosols on clouds and radiation.
CHAPS measurements will also be used to assess the ability of climate
models to accurately represent cumulus cloud/aerosol processes.
State-of-the art instruments on board the DOE Gulfstream-1 aircraft will
acquire in situ cloud and aerosol measurements. The airborne High Spectral
Resolution Lidar (HSRL) on board the NASA B200 King Air will fly above the
G-1 and provide simultaneous measurements of aerosol and cloud profiles.
The CHAPS campaign is being conducted jointly with the Cloud and Land Surface
Interaction Campaign (CLASIC), which is sponsored by the DOE Atmospheric
Radiation Measurement (ARM) program. CLASIC is a cross-disciplinary
interagency research effort designed to advance the understanding of how
land surface processes influence cumulus convection.
CLASIC will be conducted in the vicinity of the ARM Southern Great Plains
(SGP) Climate Research Facility (CRF) during the summer of 2007.
Funding for the deployment of the NASA King Air was provided by NASA and the Department of Energy (DOE) Atmospheric Science Program.
The information contained herein is provided as a public service, with the understanding
that NASA, DOE and the CHAPS project collaborators make no warranties, either expressed or implied, concerning the
accuracy, completeness, reliability, or suitability of the information. Do not quote or cite without permission. Permission for use of
these data and additional information may be obtained from the investigating scientists: Chris Hostetler, Richard Ferrare, or John Hair.
The data are preliminary and subject to change.