HR: 1340h
AN: A53A-0147 [Abstracts]
TI: Effective Radius Retrieval Using Microwave and Near-Infrared Observations
AU: * Schofield, R
EM: Robyn.Schofield@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: * Schofield, R
EM: Robyn.Schofield@noaa.gov
AF: CIRES University of Colorado, 216 UCB - Room 318, Boulder, CO 80309-0216
United States
AU: Daniel, J S
EM: John.S.Daniel@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: Solomon, S
EM: Susan.Solomon@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: Solomon, S
EM: Susan.Solomon@noaa.gov
AF: CIRES University of Colorado, 216 UCB - Room 318, Boulder, CO 80309-0216
United States
AU: Miller, H L
EM: Henry.LeRoy.Miller@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: Miller, H L
EM: Henry.LeRoy.Miller@noaa.gov
AF: CIRES University of Colorado, 216 UCB - Room 318, Boulder, CO 80309-0216
United States
AU: Portmann, R W
EM: bportmann@al.noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: Turner, D D
EM: dturner@ssec.wisc.edu
AF: University of Wisconsin - Madison, Space Science & Engineering Center,
1225 W Dayton St, Madison, WI 53706
United States
AB:
The role that aerosols play in changing the radiative properties of clouds is uncertain, with even the sign of the forcing
undetermined. The need for remotely sensing clouds is becoming more apparent with the desire to achieve a global estimate of
the radiative forcing due to changes in clouds. A new technique of combining microwave and near-infrared spectroscopic
measurements of liquid water path (LWP) and path integrated liquid water path (PLWP) respectively, to obtain effective radius
information is outlined. Microwave measurements of brightness temperature are made routinely as part of the Aerosol and
Radiation Measurement (ARM) program. Near-infrared measurements are conducted using spectroscopic measurements made in the
wavelength region between 900 and 1700 nm. The effective radius of clouds is retrieved using an optimal estimation retrieval
scheme that takes into account the measurements, their uncertainties, prior knowledge of the effective radius and its
uncertainty. The technique is applied to ground-based observations of clouds made during September at Barrow, Alaska, 2004.
DE: 0320 Cloud physics and chemistry
DE: 0321 Cloud/radiation interaction
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005