Estimation of Sensible Heat, Latent Heat, and CO2 Fluxes Using Flux-Variance Method
Date Issued
2007
Date
2007
Author(s)
Lai, Mei-Chun
DOI
en-US
Abstract
This study predicted sensible heat (H), latent heat (LE), and CO2 fluxes (FCO2) by the Flux-Variance Method (FVM) and examined the performance of this method by eddy-correlation measured flux data at three different surface types: grassland, paddy rice field, and forest. The H and LE estimations were in good agreement with the measurements over the three ecosystems. However, the CO2 flux predictions were not good; this is attributed to the complicated CO2 sources and sinks distribution. Nevertheless, the prediction accuracy of LE and FCO2 could be improved by around 15 percent if the predictions were obtained with the measured sensible heat flux. Based on our results, we suggest that it is necessary to determine the adequate similarity constants for varied scalars and sites (ecosystems) before applying FVM for predicting surface fluxes.
Subjects
通量變化法
渦度相關法
可感熱通量
潛熱通量
二氧化碳通量
相似係數
flux-variance method
sensible heat
latent heat
CO2 flux
similarity constant.
SDGs
Type
thesis
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