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Proceedings Paper

Estimation of surface latent heat flux over the ocean and its relationship to Marine Atmospheric Boundary Layer (MABL) structure
Author(s): Stephen P. Palm; Geary K. Schwemmer; Douglas Vandemark; Keith D. Evans; David O. Miller
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Paper Abstract

A new technique combining active and passive remote sensing instruments for the estimation of surface latent heat flux over the ocean is presented. This synergistic method utilizes aerosol lidar backscatter data, multi-channel infrared radiometer data and microwave scatterometer data acquired onboard the NASA P-3B research aircraft during an extended field campaign over the Atlantic ocean in support of the Lidar In-space Technology Experiment in September of 1994. The 10 meter wind speed derived from the scatterometers and the lidar-radiometer inferred near- surface moisture are used to obtain an estimate of the surface flux of moisture via bulk aerodynamic formulae. The results are compared with the Special Sensor Microwave Imager (SSM/I) daily average latent heat flux and show reasonable agreement. However, the SSM/I values are biased high by about 30 W/m2. In addition, the MABL height, entrainment zone thickness and integrated lidar backscatter intensity are computed from the lidar data and compared with the magnitude of the surface fluxes. The results show that the surface latent heat flux is most strongly correlated with entrainment zone top, bottom and the integrated MABL lidar backscatter, with corresponding correlation coefficients of 0.62, 0.67 and 0.61, respectively.

Paper Details

Date Published: 22 October 1999
PDF: 12 pages
Proc. SPIE 3757, Application of Lidar to Current Atmospheric Topics III, (22 October 1999); doi: 10.1117/12.366432
Show Author Affiliations
Stephen P. Palm, Science Systems and Applications Inc. (United States)
Geary K. Schwemmer, NASA Goddard Space Flight Ctr. (United States)
Douglas Vandemark, NASA Goddard Space Flight Ctr. (United States)
Keith D. Evans, Univ. of Maryland/Baltimore County (United States)
David O. Miller, Science Systems and Applications Inc. (United States)


Published in SPIE Proceedings Vol. 3757:
Application of Lidar to Current Atmospheric Topics III
Arthur J. Sedlacek; Kenneth W. Fischer, Editor(s)

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