A comparison of methane emission measurements using Eddy Covariance and manual and automated chamber-based techniques in Tibetan Plateau alpine wetland.
A comparison of methane emission measurements using Eddy Covariance and manual and automated chamber-based techniques in Tibetan Plateau alpine wetland.
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DOI：
10.1016/j.envpol.2013.06.018
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发表时间：
2013-10
影响因子：
8.9
通讯作者：
Lingfei Yu;Hao Wang;Guangshuai Wang;Weimin Song;Yao Huang;Sheng Li;N. Liang;Yanhong Tang;Jinsheng He
中科院分区：
文献类型：
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作者：
Lingfei Yu;Hao Wang;Guangshuai Wang;Weimin Song;Yao Huang;Sheng Li;N. Liang;Yanhong Tang;Jinsheng He
通过比较不同的甲烷通量测量技术，可以对这些技术的性能和可靠性进行独立评估。比较了传统的离散人工静态箱(MSC)、连续自动箱(CAC)和涡动协方差(EC)三种测量高寒湿地CH4通量的方法。我们发现这三种方法在季节CH4通量分布上有很好的一致性，但CAC和EC方法得到的日变化规律不同。CAC法的CH4通量日变化与土壤温度呈正相关，EC法的日变化与白天的太阳辐射和净CO2通量密切相关，而与夜间的土壤温度密切相关。在09：00和12：00之间测量CH4通量时，MSC法分别比CAC法和EC法高25.3%和7.6%。
Comparing of different CH4flux measurement techniques allows for the independent evaluation of the performance and reliability of those techniques. We compared three approaches, the traditional discrete Manual Static Chamber (MSC), Continuous Automated Chamber (CAC) and Eddy Covariance (EC) methods of measuring the CH4fluxes in an alpine wetland. We found a good agreement among the three methods in the seasonal CH4flux patterns, but the diurnal patterns from both the CAC and EC methods differed. While the diurnal CH4flux variation from the CAC method was positively correlated with the soil temperature, the diurnal variation from the EC method was closely correlated with the solar radiation and net CO2fluxes during the daytime but was correlated with the soil temperature at nighttime. The MSC method showed 25.3% and 7.6% greater CH4fluxes than the CAC and EC methods when measured between 09:00 h and 12:00 h, respectively.