| 荒漠杜加依林冠层水热变化及CO2交换特征 |
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| 引用本文： | 何学敏,吕光辉,秦璐,李岩,杨晓东,杨建军,于恩涛. 荒漠杜加依林冠层水热变化及CO2交换特征[J]. 生态学报, 2019, 39(3): 1052-1062 |
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| 作者姓名： | 何学敏 吕光辉 秦璐 李岩 杨晓东 杨建军 于恩涛 |
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| 作者单位： | 新疆大学干旱生态环境研究所;新疆大学生态学博士后科研流动站;新疆绿洲生态教育部重点实验室;新疆环境保护科学研究院;新疆环境污染监控与风险预警重点实验室;新疆大学资源与环境科学学院;中国科学院大气物理研究所 |
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| 基金项目： | 新疆维吾尔自治区重点实验室开放课题（2015KL004）；国家自然科学基金（31760168）；新疆大学博士科研启动基金（BS150258） |
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| 摘 要： | 选取新疆艾比湖湿地国家级自然保护区荒漠杜加依林为研究对象,利用通量塔连续观测数据分析新疆艾比湖流域内杜加依林冠层界面水热垂直变化和CO_2交换特征,进一步比较了冠层界面湍流碳通量、植物冠层储存碳通量及净碳交换量,探讨了不同时间和垂直空间序列下杜加依林冠层界面温湿廓线与CO_2交换过程的相互关系。结果表明,新疆艾比湖流域内杜加依林冠层上方大气稳定度生长季的6—9月为中性(z/L=0.009),非生长季为不稳定(z/L=-0.449),全年总体呈不稳定水平(z/L=-0.194);冠层界面上气温垂直变幅小于5℃,随高度呈递增趋势,湿度垂直变幅超过40%;地-气碳通量呈秋冬小春夏大规律,年碳收支高于干旱区平均水平,为-0.026 mg CO_2m~(-2)s~(-1),表现为碳汇;垂直空间尺度上垂直温湿度差与生态系统净碳交换量(NEE,Net Ecosystem Exchange)拟合较好,温度拟合结果为R~2=0.7350(P﹤0.01),湿度拟合结果为R~2=0.3627(P﹤0.01),水热变点分别为5%和1℃,而季节尺度上温度拟合结果较好,温度拟合结果为R~2=0. 5221(P﹤0. 01),湿度拟合结果为R~2=0.1716(P﹤0.01),变点为55%和18℃。生长季较小的冠层垂直温差有利于杜加依林对大气CO_2的吸收,而冠层高湿环境则会抑制杜加依林对CO_2的吸收。
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| 关 键 词： | 杜加依林 垂直变幅 水热变化 冠层 涡度相关 |
| 收稿时间： | 2017-12-05 |
| 修稿时间： | 2018-09-04 |
Carbon interfacial hydrothermal variation and CO2 exchange characteristics of the Tugai forest in a desert environment |
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| HE Xuemin,L,#; Guanghui,QIN Lu,LI Yan,YANG Xiaodong,YANG Jianjun and YU Entao. Carbon interfacial hydrothermal variation and CO2 exchange characteristics of the Tugai forest in a desert environment[J]. Acta Ecologica Sinica, 2019, 39(3): 1052-1062 |
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| Authors: | HE Xuemin,L&# Guanghui,QIN Lu,LI Yan,YANG Xiaodong,YANG Jianjun YU Entao |
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| Affiliation: | Institute of Arid Ecology, Xinjiang University, Urumqi 830046, China;Post-Doctoral Research Center for Ecology, Xinjiang University, Urumqi 830046, China;Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China,Institute of Arid Ecology, Xinjiang University, Urumqi 830046, China;Post-Doctoral Research Center for Ecology, Xinjiang University, Urumqi 830046, China;Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China,Xinjiang Academy of Environment Protection Science, Urumqi 830011, China;Xinjiang Key Laboratory of Environmental Pollution Monitoring and Risk Warning, Urumqi 830011, China,Institute of Arid Ecology, Xinjiang University, Urumqi 830046, China;Post-Doctoral Research Center for Ecology, Xinjiang University, Urumqi 830046, China;Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China,Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China;College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China,Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China;College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China and Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | |
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| Keywords: | Tugai forest vertical amplitude hydrothermal variation canopy eddy covariance |
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