Observed Dependence of Outgoing Longwave Radiation on Sea Surface Temperature and Moisture

Autor:	A. Raval, Abraham H. Oort, Venkatachalam Ramaswamy
Rok vydání:	1994
Předmět:	Atmospheric Science Sea surface temperature Atmosphere of Earth Precipitable water law Climatology Middle latitudes Radiosonde Outgoing longwave radiation Environmental science Humidity Relative humidity law.invention
Zdroj:	Journal of Climate. 7:807-821
ISSN:	1520-0442 0894-8755
DOI:	10.1175/1520-0442(1994)007<0807:odoolr>2.0.co;2
Popis:	The authors have empirically examined the dependence of the outgoing longwave radiation (OLR) on sea surface temperature (Ts), precipitable water (W), and height-mean relative humidity (RH¯). The OLR is obtained from 4 yr of data from the Earth Radiation Budget Experiment (ERBE), while Ts, W, and RH¯ are obtained from objective analyses of rawinsonde and ship data. It is found that in the midlatitudes, the surface temperature explains over 80% of the variability in the clear-sky OLR (Fcs) and almost half of the variability in the total OLR (Ftot). It fails badly in the tropics and subtropics, however, where (Ts explains only about 20% of the variability in (Fcs, and is largely decoupled from Ftot. The two-dimensional contour plot of the OLR binned with respect to Ts and RH¯ is marked by distinct changes in the gradient that are consistent with inferences from earlier investigations. For low values of Ts (
Databáze:	OpenAIRE
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