Comparison of Sensible and Latent Heat Fluxes over Farmland Underlying Surface of Erhai Lakeside Region Measured from Large Aperture Scintillometer and Eddy-covariance System

XU Anlun;LI Jian;PENG Hao;SUN Jihua

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Plateau Meteorology ›› 2017, Vol. 36 ›› Issue (1) : 98-106. DOI: 10.7522/j.issn.1000-0534.2016.00009

Comparison of Sensible and Latent Heat Fluxes over Farmland Underlying Surface of Erhai Lakeside Region Measured from Large Aperture Scintillometer and Eddy-covariance System

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Abstract

The sensible and latent heat fluxes were determined with a Large Aperture Scintillometer (LAS) which was set up over farmland underlying surface of Erhai Lakeside region with a path length of 1938 m.These large-scale sensible and latent heat fluxes were compared with local-scale Eddy-covariance System (EC) measurements.The results showed excellent agreement for the sensible and latent heat fluxes measured by LAS and EC with the correlation coefficient up to 0.85 and 0.90, respectively, and revealed clear diurnal variation and season change for the difference of heat fluxes.The diurnal variation demonstrated that sensible heat flux measured by LAS was 15.6 W·m-2 lower than that by EC and latent heat flux measured by LAS was 94.6 W·m-2 higher than that by EC in daytime, however, it was contrary in nighttime.The season change displayed that monthly mean sensible heat flux measured by LAS was 6.9 W·m-2 lower than that by EC in wet season (May to August, October) and monthly mean latent heat flux measured by LAS was 2.1 W·m-2 lower than that by EC in dry season (April), but other month was on the contrary.

Key words

Large aperture scint / Eddy-covariance syst / Sensible heat flux / Latent heat flux

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XU Anlun , LI Jian , PENG Hao , SUN Jihua. Comparison of Sensible and Latent Heat Fluxes over Farmland Underlying Surface of Erhai Lakeside Region Measured from Large Aperture Scintillometer and Eddy-covariance System. Plateau Meteorology. 2017, 36(1): 98-106 https://doi.org/10.7522/j.issn.1000-0534.2016.00009

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