[Source: "Cloudsat Level 2 Fluxes and Heating Rates Product Process Description and Interface Control Document" ]
This document provides an overview of the 2B-FLXHR ﬂux and heating rate algorithm for CloudSat. The objective of the algorithm is to make use of liquid and ice water content estimates from the CloudSat Proﬁling Radar (CPR) to produce estimates of broadband ... ﬂuxes and heating rates for each radar proﬁle. For a particular radar proﬁle, upwelling and down- welling longwave and shortwave ﬂux proﬁles are calculated at discrete levels of the atmosphere. Corresponding heating rates are inferred from these ﬂuxes. In order to perform these calculations, the algorithm makes use of a combination of atmospheric state variables obtained from ECMWF reanalysis data, proﬁles of cloud ice and liquid water content obtained from the CloudSat 2B-LWC and 2B-IWC products, and surface albedos obtained from seasonally-varying maps of surface reﬂectance properties. The remainder of this document describes the algorithm in greater detail. Section 2 provides an overview of the theoretical basis upon which the algorithm is built. Sections 3 and 4 describe inputs to the algorithm and detail its implementation. The output format for the product is summarized in Section 5 while instructions for the operator can be found in Section 6.
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