Global Top-of-Atmosphere Broadband Shortwave and Longwave Fluxes Derived from AVHRR
While the NOAA-series satellites provide monitoring over a long time period from ~1980 on, they have done so using narrowband visible and infrared measurements comprising a small portion of the total radiative flux, whereas broadband shortwave and longwave fluxes have been measured from 1984- present by the ERBE and CERES instruments. To derive climatically relevant information from AVHRR, empirical narrowband-to-broadband (NB-BB) fits are derived by matching the narrowband fluxes to the corresponding ERBE and CERES broadband fluxes.
These initial NB-BB flux fits have been derived on a monthly basis covering land, water and snow for the entire globe. The NB-BB fits have been implemented within the VISST satellite cloud and radiative property retrieval framework, and are initially applied to AVHRR aboard NOAA-9 and NOAA-18. Broadband fluxes derived from AVHRR for various domains in 1986 and 2007-2011 will be validated with respect to available ERBE and CERES BB fluxes.