Net water vapour exchange over a mixed needle and broad-leaved forest in Changbai Mountain during autumn
作者： Wen Xuefa , Yu Guirui , Sun Xiaomin , Li Qingkang , Ren Chuanyou
DOI: 10.1007/BF02837885
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摘要: Water vapour and CO2 fluxes were measured by the eddy-covariance technique above a mixed needle broad-leaved forest with affiliated meteorological measurements in Changbai Mountain as part of China’s FLUX projects since late August 2002. Net water exchange environmental control over examined from September 1 to October 31 To quantify seasonal dynamics, transition period was separated into leafed, leaf falling leafless stages according development area. The results showed that (a) variation mainly controlled net radiation (Rn) which could account for 78.5%, 63.4% 56.6% stages, respectively, while other factors’ effects varied evidently; (b) magnitude flux decreased remarkably during autumn daily mean 24.2 mg m−2 s−1 (100%), 14.8 (61.2%) 10.3 (42.6%) stage, respectively; (c) budget estimated be 87.1 kg H2O m−2, 1427.2 g d−1 varying markedly 3104.0 227.5 m−2d−1.
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