Abstract
Satellite-derived surface radiative fluxes have been recently improved and extended. However, the accuracy of recent satellite-derived surface radiative fluxes in the Arctic is not well characterized. Here, the authors assess the accuracy of the net surface radiative flux (NETSRF) in the Arctic, focusing on the ice-covered ocean, for three satellite products against four in situ measurements collected from different areas in the Arctic. The three satellite products are the Surface Radiation Budget project (SRB), the International Satellite Cloud Climatology Project (ISCCP), and the Extended AVHRR Polar Pathfinder version-2 (APP-x). Our comparisons suggest that: (1) in terms of the overall bias, root-mean-square error, and correlation, the NETSRF of ISCCP is closer to in situ observations than that of SRB and APP-x; (2) in terms of the diurnal variation of the biases, it is not very clear which satellite product is superior to the others; and (3) in terms of the interannual variability of the bias,...
Highlights
Accurate knowledge of net radiative flux at the surface is critical for understanding and simulating climate variations
The purpose of this paper is to extend previous studies to evaluate the accuracy and uncertainty of net surface radiative flux (NETSRF) over the Arctic for recent satellite-derived products using assembled in situ measurements
A merged data-set containing a suite of satellite, reanalysis, and in situ products from 1979 to the present has been released
Summary
Accurate knowledge of net radiative flux at the surface is critical for understanding and simulating climate variations. This is true in the Arctic, where significant changes are occurring The Arctic has seen amplified warming associated with a rapid decline in sea ice since the satellite era Curry, Schramm, and Ebert 1995). The Arctic has frequent and extensive clouds, especially mixed-phase clouds, which have a net heating effect at the surface by altering downward longwave radiation Curry et al 1996; Wang and Key 2003). Cloud-related processes have been linked to the recent decline in Arctic sea ice, i.e. increased cloud cover contributes to increased downward longwave radiation Cloud-related processes have been linked to the recent decline in Arctic sea ice, i.e. increased cloud cover contributes to increased downward longwave radiation (e.g. Kay and Gettelman 2009; Kim et al 2017)
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