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Water & Energy Cycles

Surface turbulent heat fluxes will be derived from a combination of satellite observations. These fluxes will be gridded to more accurately calculate surface turbulent fluxes of energy (sensible and latent heat fluxes) and moisture (evaporation) over water. Many NEWS projects would benefit from more accurate oceanic turbulent fluxes of heat and moisture. The unique aspects of this proposal are (1) a new approach for satellite-based retrieval of near surface (10m height) air temperature and atmospheric humidity on a 3 hourly to 24 hourly scale; (2) calculation of surface turbulent fluxes on these scales from non-NWP data; and (3) an investigation of the strengths and weaknesses of gridding that will be optimized to minimize regional and global biases in the fluxes. Recent SEAFLUX comparisons of NWP flux products (and flux related variables) have found large regional biases. We have also compared fluxes based on monthly averaged wind, temperature, and humidity to the average of fluxes determined from six hourly data: biases exceeding 5Wm-2 cover approximately half the global ocean, and that biases exceeding 100Wm-2 routinely occur near western boundary currents during winter months. Our goals are to more accurately determine the input data for flux models, to work with that data on a time scale that greatly reduces the large biases found in monthly products, and to grid these fluxes in a manner that is relatively effective in reducing biases and random errors.

Project PI: Mark Bourassa/ Florida State University

Center for Ocean Atmospheric Prediction Studies (COAPS) Florida State University 200 R.M. Johnson Building 2035 E. Paul Dirac Drive PO Box 3062840 Tallahassee, FL 32306-2840 USA

Phone: (850) 645-4788 

Fax: (850) 644-9642

Email: bourassa@coaps.fsu.edu

http://www.coaps.fsu.edu/~bourassa/

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Started: Aug 10, 2010

Last Activity: Dec 16, 2010

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