A comparison of latent heat fluxes over global oceans for ERA and NCEP with GSSTF2

Details A comparison of latent heat fluxes over global oceans for ERA and NCEP with GSSTF2 A comparison of latent heat fluxes over global oceans for ERA and NCEP with GSSTF2

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3303810f&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 3, CiteID L03810

Statistics

Computation

4

Computational Geophysics: Data Presentation And Visualization, Computational Geophysics: Data Management, Computational Geophysics: Data Analysis: Algorithms And Implementation, Oceanography: Physical: Air/Sea Interactions (0312, 3339)

Scientific paper

The ECMWF Re-Analysis (ERA) and NCEP reanalysis monthly latent heat flux (LHF) data are compared with those of the Goddard Satellite-Based Surface Turbulent Fluxes, version2 (GSSTF2), respectively, during the period of 1988-2000, over the global oceans between 60°S and 60°N. Qualitatively, the annual mean LHF fields and monthly variations are similar for GSSTF2, ERA, and NCEP. Quantitatively, however, there are distinct differences among them. The annual mean ERA LHF is closer to GSSTF2 than NCEP in the tropics (5°-25°S and 8°-22°N) and midlatitudes, while the situation is opposite in other zones. The temporal variability of monthly LHF difference (ERA-GSSTF2) is smaller than that of NCEP-GSSTF2 in the tropics, yet the former and the latter are similar in other zones. To find causes for the discrepancies of LHF, the differences of both the 10-m wind speed (U10m) and sea-air humidity difference (Qs-a) among these data sets have been studied. The differences of the annual mean fields and the monthly variations of the differences between GSSTF2 and the other two data sets in the tropics may be mainly caused by the discrepancies of both U10m and Qs-a.

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