OLR climatology

This page presents a monthly mean climatology of top of the atmosphere outgoing long wave radiation (OLR) averaged over 1979-98. It is based on satellite observations of OLR. Some uncertainty exists because of biases in the instrument and sampling, but I believe it is on the order of a few Watts/m2.

Mean OLR Standard deviation of 20 monthly means Mean plus one standard deviation Mean minus one standard deviation
January January January January
February February February February
March March March March
April April April April
May May May May
June June June June
July July July July
August August August August
September September September September
October October October October
November November November November
December December December December