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Proceedings Paper

A decade of changing surface energy balance components over a large water region
Author(s): Pakorn Petchprayoon; Peter D. Blanken; Khalid Hussein; Waleed Abdalati; Siam Lawavirotwong
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Paper Abstract

This study has investigated the physical processes of energy exchange between the water surface and atmosphere over Lake Huron. The four components of surface energy balance, including net radiation, latent heat, sensible heat, and heat storage, were estimated using the eleven years (2002-2012) daily MODIS data together with in-situ measurements. Good agreement was found between the seasonal turbulent heat fluxes calculated from satellite data and those from the direct measurements (eddy covariance method) with correlation coefficients of 0.94 and 0.95 for sensible heat and latent heat, respectively. There were temporal, spatial heterogeneities, and strong seasonal pattern for all of the four components, which were very high in summer and low in winter for net radiation and heat storage. In contrast, latent heat and sensible heat were very high in the winter and very low in the summer. Trend analysis revealed long term changes for each of the energy balance components, particularly the increase in latent heat which was equivalent to evaporation rate of 0.017 mm m-2 per year, indicating that lake evaporation increased by 0.19 mm m-2 over the eleven years observation period. This was possibly a result of a smaller amount of over lake ice cover and an increase in surface water temperature of Lake Huron.

Paper Details

Date Published: 19 October 2016
PDF: 20 pages
Proc. SPIE 9999, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016, 99990B (19 October 2016); doi: 10.1117/12.2241516
Show Author Affiliations
Pakorn Petchprayoon, Geo-Informatics and Space Technology Development Agency (Thailand)
Peter D. Blanken, Univ. of Colorado Boulder (United States)
Khalid Hussein, Univ. of Colorado Boulder (United States)
Waleed Abdalati, Univ. of Colorado Boulder (United States)
Siam Lawavirotwong, Geo-Informatics and Space Technology Development Agency (Thailand)

Published in SPIE Proceedings Vol. 9999:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt; Caroline Nichol; Oscar Aldred, Editor(s)

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