| 长白山针阔混交林秋季净生态系统水气交换量 |
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| 引用本文： | 温学发,于贵瑞,孙晓敏,Li Qingkang,REN Chuanyou,HAN Shijie.长白山针阔混交林秋季净生态系统水气交换量[J].地理学报(英文版),2003,13(4):463-468. |
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| 作者姓名： | 温学发 于贵瑞 孙晓敏 Li Qingkang REN Chuanyou HAN Shijie |
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| 作者单位： | [1]InstituteofAppliedEcology,CAS,Shenyang110016,China [2]Inst.ofGeographicSciencesandNaturalResourcesResearch,CAS,Beijing100101,China |
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| 基金项目： | Knowledge Innovation Project of CAS,No.KZCX1-SW-01-01A |
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| 摘 要： | Water vapour and CO2 fluxes were measured by the eddy-covariance technique above a mixed needle and broad-leaved forest with affiliated meteorological measurements in Changbai Mountain as part of China‘s FLUX projects since late August in 2002. Net water vapour exchange and environmental control over the forest were examined from September 1 to October 31 in 2002. To quantify the seasonal dynamics, the transition period was separated into leafed, leaf falling and leafless stages according to the development of leaf area. The results showed that (a) seasonal variation of water vapour exchange was mainly controlled by net radiation (Rn) which could account for 78.5%, 63.4% and 56.6% for leafed, leaf falling and leafless stages, respectively, while other environmental factors‘ effects varied evidently; (b) magnitude of water vapour flux decreased remarkably during autumn and daily mean of water vapour exchange was 24.2 mg m^-2 s^-1 (100%), 14.8 mg m^-2 s^-1 (61.2%) and 10.3 mg m^-2 s^-1 (42.6%) for leafed, leaf falling and leafless stage, respectively; and (c) the budget of water vapour exchange during autumn was estimated to be 87.1 kg H2O m2, with a mean of 1427.2 g H2O d^-1 varying markedly from 3104.0 to 227.5 g H2O m^-2d^-1.
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| 关 键 词： | 水汽交换 潜热流量 长白山 秋季 针阔混交林 CO2通量 |
| 收稿时间： | 26 March 2003 |
| 修稿时间： | 7/5/2003 12:00:00 AM |
Net water vapour exchange over a mixed needle and broad-leaved forest in Changbai Mountain during autumn |
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| WEN Xuefa,YU Guirui,SUN Xiaomin,LI Qingkang,REN Chuanyou,HAN Shijie.Net water vapour exchange over a mixed needle and broad-leaved forest in Changbai Mountain during autumn[J].Journal of Geographical Sciences,2003,13(4):463-468. |
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| Authors: | WEN Xuefa YU Guirui SUN Xiaomin LI Qingkang REN Chuanyou HAN Shijie |
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| Institution: | 1. Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China|;
2. Institute of Applied Ecology, CAS, Shenyang 110016, China |
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| Abstract: | Water vapour and CO2 fluxes were measured by the eddy-covariance technique above a mixed needle and broad-leaved forest with affiliated meteorological measurements in Changbai Mountain as part of China's FLUX projects since late August in 2002. Net water vapour exchange and environmental control over the forest were examined from September 1 to October 31 in 2002. To quantify the seasonal dynamics, the transition period was separated into leafed, leaf falling and leafless stages according to the development of leaf area. The results showed that (a) seasonal variation of water vapour exchange was mainly controlled by net radiation (Rn) which could account for 78.5%, 63.4% and 56.6% for leafed, leaf falling and leafless stages, respectively, while other environmental factors' effects varied evidently; (b) magnitude of water vapour flux decreased remarkably during autumn and daily mean of water vapour exchange was 24.2 mg m-2 s-1 (100%), 14.8 mg m-2 s-1 (61.2%) and 10.3 mg m-2 s-1 (42.6%) for leafed, leaf falling and leafless stage, respectively; and (c) the budget of water vapour exchange during autumn was estimated to be 87.1 kg H2O m-2, with a mean of 1427.2 g H2O d-1' varying markedly from 3104.0 to 227.5 g H2O m-2d-1. |
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| Keywords: | eddy-covariance net water vapour exchange latent heat flux |
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