A true eddy accumulation system for trace gas fluxes using disjunct eddy sampling method

被引：33
|
作者：
Rinne, HJI
Delany, AC
Greenberg, JP
Guenther, AB
机构：
[1] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80303 USA
[2] Natl Ctr Atmospher Res, Atmospher Technol Div, Boulder, CO 80303 USA
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2000年 / 105卷 / D20期
关键词：
D O I：
10.1029/2000JD900315
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
A new true eddy accumulation flux measurement system, based on the disjunct sampling approach, has been developed and tested. In disjunct sampling, short, separate samples are taken instead of continuously sampling the air as in traditional relaxed eddy accumulation and eddy covariance systems. This method reduces the number of samples but allows more time to process them. Simulation shows that the fluxes, calculated using disjunct data, are close to those calculated using continuous data. The disjunct true eddy accumulation instrument was successfully deployed to measure monoterpene fluxes at Niwot Ridge, Colorado. The ability of the system to measure the sample flow accurately critical for any eddy accumulation system, was tested using atmospheric CFC-113 as a tracer, with good results. The system was capable of measuring relatively low alpha -pinene fluxes, below 10 ng m(-2) s(-1) at T = 8 degreesC, over a subalpine forest.
引用
收藏
页码：24791 / 24798
页数：8
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