涡度相关通量修正方法比较

Contrast Research on Flux Correction Methods for Eddy-Covariance Measurement

利用安徽省寿县国家气候观象台2008年2月10日至9月20日湍流通量观测资料,分别采用WPL和Liu修正方法对潜热通量和CO2通量进行修正,比较了修正前后对通量的影响以及两种方法间的差异。结果表明：两种修正方法能够有效消除直接计算含有虚假的吸收信息,从而提高通量数据的精度;经过两种方法修正,潜热通量增加约3%-5%,CO2通量减小1%-2%;WPL（Webb-Pearman-Leuning）方法对潜热通量和CO2通量的修正幅度均要大于Liu修正。

Based on the data of turbulence flux observed by the edd-covariance method from 10 February to 20 September 2008 at the Shouxian National Climate Observatory,the WPL（Webb-Pearman-Leuning） and Liu methods are used to correct the latent heat flux and CO2 flux.The differences between the two methods and the influence of the correction methods on flux measurement are contrasted.The main results indicate that both methods can avoid effectively the false messages resulted from calculation and increase the precision of the measurements.The latent heat flux increased about 3% to 5%,and the CO2 flux decreased about 1% to 2% after correction.The correctional range of the WPL method is bigger than that of the Liu method.