A 22-Year Dataset of Surface Longwave Fluxes in the Arctic
Downwelling longwave fluxes (DLFs) over the Arctic surface have been generated from 22.5 years of radiances and retrievals from the TIROS (television and infrared observation satellite) operational vertical sounder (TOVS). The flux retrieval algorithm has been validated and improved using surfacebas...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.298.234 http://www.arm.gov/publications/proceedings/conf14/extended_abs/francis-j.pdf |
| Summary: | Downwelling longwave fluxes (DLFs) over the Arctic surface have been generated from 22.5 years of radiances and retrievals from the TIROS (television and infrared observation satellite) operational vertical sounder (TOVS). The flux retrieval algorithm has been validated and improved using surfacebased radiation and cloud observations from the Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) site in Barrow, Alaska, and from the Surface Heat Balance of the Arctic (SHEBA) field program (1997-98) in the Beaufort Sea. The DLF product is presented on a 100 x 100 km 2 daily grid from mid-1979 through 2001 for the region north of 60°N. We also present spatial patterns of monthly mean fluxes and preliminary analyses of temporal changes. Project Summary A reliable estimate of the surface DLF is a glaring void in available forcing datasets for models of Arctic sea ice and ocean circulation. We have developed a new method to estimate the DLF from a combination of satellite sounder retrievals and brightness temperatures from the TOVS, which has flown on National Oceanic Atmospheric Administration (NOAA) polar-orbiting satellites continuously since late 1979. The overarching goal of this project was to generate a 20-year dataset of surface DLF measurements |
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