A critical step in determining soil‐to‐atmosphere nitrous oxide (N2O) exchange using non‐steady‐state chambers is converting collected gas concentration versus time data to flux values using a flux calculation (FC) scheme. It is well documente...
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https://www.riss.kr/link?id=O113219032
2020년
-
0047-2425
1537-2537
SCI;SCIE;SCOPUS
학술저널
1141-1155 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
A critical step in determining soil‐to‐atmosphere nitrous oxide (N2O) exchange using non‐steady‐state chambers is converting collected gas concentration versus time data to flux values using a flux calculation (FC) scheme. It is well documente...
A critical step in determining soil‐to‐atmosphere nitrous oxide (N2O) exchange using non‐steady‐state chambers is converting collected gas concentration versus time data to flux values using a flux calculation (FC) scheme. It is well documented that different FC schemes can produce different flux estimates for a given set of data. Available schemes differ in their theoretical basis, computational requirements, and performance in terms of both accuracy and precision. Nonlinear schemes tend to increase accuracy compared with linear regression but can also decrease precision. The chamber bias correction method can be used if soil physical data are available, but this introduces additional sources of error. Here, the essential theoretical and practical aspects of the most commonly used FC schemes are described as a basis for their selection and use. A gold standard approach for application and selection of FC schemes is presented, as well as alternative approaches based on availability of soil physical property data and intensity of sample collection during each chamber deployment. Additional criteria for scheme selection are provided in the form of an error analysis tool that quantifies performance with respect to both accuracy and precision based on chamber dimensions and sampling duration, soil properties, and analytical measurement precision. Example error analyses are presented for hypothetical conditions illustrating how such analysis can be used to guide FC scheme selection, estimate bias, and inform design of chambers and sampling regimes.
Cover Image, Volume 49, Issue 5
Isomerization of chlortetracycline in prairie wetland water