An evaluation of operational GOES-derived single-layer cloud top heights with ARSCL data over the ARM Southern Great Plains Site

Authors

William L. Smith Jr., NASA Langley Research Center
Patrick Mennis, NASA Langley Research Center
Heather Finney, Hastings College
Rabindra Palikonda, SSAI, Hampton, Virginia
Mandana M. Khaiyer, SSAI, Hampton, Virginia

Date of this Version

2008

Citation

Smith, W. L., Jr., P. Minnis, H. Finney, R. Palikonda, and M. M. Khaiyer (2008), An evaluation of operational GOES-derived single-layer cloud top heights with ARSCL data over the ARM Southern Great Plains Site, Geophys. Res. Lett., 35, L13820, doi:10.1029/ 2008GL034275.

Comments

U.S. Government Work

Abstract

Cloud top heights retrieved from Geostationary Operational Environmental Satellite (GOES) data are evaluated using comparisons to 5 years of surface-based cloud radar and lidar data taken at the Atmospheric Radiation Measurement (ARM) program’s site near Lamont, Oklahoma. Separate daytime and nighttime algorithms developed at NASA Langley Research Center (LaRC) applied to GOES imager data and an operational CO₂-slicing technique applied to GOES sounder data are tested. Comparisons between the daytime, nighttime and CO₂-slicing cloud top heights and the surface retrievals yield mean differences of -0.84 ± 1.48 km, -0.56 ± 1.31 km, and -1.30 ± 2.30 km, respectively, for all clouds. The errors generally increase with increasing cloud altitude and decreasing optical thickness. These results, which highlight some of the challenges associated with passive satellite cloud height retrievals, are being used to guide development of a blended LaRC/CO₂-slicing cloud top height product with accuracies suitable for assimilation into weather forecast models.