Earth Radiation Budget Observations. Hai-Tien Lee Arnold Gruber University of Maryland College Park, CICS/ESSIC-NOAA Robert G. Ellingson Florida State University, Dept. of Meteorology Istvan Laszlo NOAA/NESDIS. NOAA/NESDIS Cooperative Research Program 3rd Annual Science Symposium.
University of Maryland College Park, CICS/ESSIC-NOAA
Robert G. Ellingson
Florida State University, Dept. of Meteorology
NOAA/NESDIS Cooperative Research Program 3rd Annual Science Symposium
Fort Collins, CO, August 15-16, 2006
Kiehl and Trenberth, 1997. Bull. Amer. Meteor. Soc., 78, 197-208.
Contour level 10Wm-2Pastel yellow are within ±10Wm-2
AVHRR OLR lacks sensitivity to water vapor variation, especially the upper tropo. humidity (UTH).
Ellingson et al. (1989)
=local zenith angle
Ellingson et al., 1994: Validation of a technique for estimating outgoing longwave radiation from HIRS radiance observations J. Atmos. Ocean. Technol., 11, 357-365.
Ba et al., 2003: Validation of a
technique for estimating OLR with the GOES sounder. J. Atmos. Ocean. Technol.,20, 79–89.
HIRS OLR is Operational since 1998.
Pingping Xie, 2006
• 1°x1° lat/lon
• ±30 minutes
• Std error of mean OLR < 1 Wm-2
25 Years of Monthly Mean OLR Local Time Composite
Tropical 20 NS
ERBS NS vs. HIRS
Best-fit line slope = 0.998
STD = 0.97 Wm-2r = 0.86
HIRS product is as stable as ERBS-NS.
Relative to HIRS
Tropical 20 NS
HIRS OLR is a reliable and traceable Transfer Standard
Global avg= 1.5 Wm-2
Global= 2.8 Wm-2
Global= 4.0 Wm-2
Global RMS Diff = 4.0 Wm-2
* CERES ES4 from Terra-Xtrack Ed.2
Synergy between Operational Polar-Orbiting and Geostationary Satellite OLR Products
NOAA/MetOp/NPOESS - HIRS, IASI, CrIS, ERBS/CERES
Gulf of Mexico
Sierra Madre Occidental
GOES and GERB OLR data provide detailed diurnal variation information that we can use it to construct and examine the diurnal models. This figure shows the phase information of the OLR diurnal variation for the GOES-E full disk domain with some typical patterns at selected sites. The HIRS-based diurnal model was compared against that of the GOES, which acts as a reference for error analysis.