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- Title
A cost-effective method for reducing soil disturbance-induced errors in static chamber measurement of wetland methane emissions.
- Authors
Winton, R.; Richardson, Curtis
- Abstract
Static chambers used for sampling methane (CH) in wetlands are highly sensitive to soil disturbance. Temporary compression around chambers during sampling can inflate the initial chamber CH headspace concentration and/or lead to generation of non-linear, unreliable flux estimates that must be discarded. In this study, we tested an often-used rubber gasket (RG)-sealed static chamber against a water-filled gutter (WFG) seal design that could be set up and sampled from a distance of 2 m with a newly designed remote rod sampling system to reduce soil disturbance. Compared to conventional RG design, our remotely sampled static chambers reduced the chance of detecting inflated initial CH concentrations (>3.6 ppm) from 66 to 6 % and nearly doubled the proportion of robust linear regressions ( r > 0.9) from 45 to 86 %. Importantly, the remote rod sampling system allows for more accurate and reliable CH sampling without costly boardwalk construction. This paper presents results demonstrating that the remote rod sampling system combined with WFG static chambers improves CH data reliability by reducing initial gas measurement variability due to chamber disturbance when tested on a mineral soil-restored wetland in Charles City County, Virginia, USA.
- Subjects
CHARLES City County (Va.); GAS chambers; EMISSIONS (Air pollution); METHANE &; the environment; WETLANDS; COST effectiveness
- Publication
Wetlands Ecology & Management, 2016, Vol 24, Issue 4, p419
- ISSN
0923-4861
- Publication type
Article
- DOI
10.1007/s11273-015-9468-5