Steven P. Oncley, Anthony C. Delany, Thomas W. Horst, Pieter P. Tans
{"title":"Verification of flux measurement using relaxed eddy accumulation","authors":"Steven P. Oncley, Anthony C. Delany, Thomas W. Horst, Pieter P. Tans","doi":"10.1016/0960-1686(93)90409-R","DOIUrl":null,"url":null,"abstract":"<div><p>Businger and Oncley (1990; Flux measurement with conditional sampling, <em>J. Atmos. Ocean Technol.</em><strong>7</strong>, 349–352) proposed a method to measure fluxes of scalar quantities by determining the mean concentration difference between air samples collected selectively during updrafts. This method has been tested for carbon dioxide over a growing cotton field where the fluxes were large. Simultaneous direct flux measurements were made using the eddy-correlation technique. These two techniques gave fluxes which were mostly within 20% on one of the two experiment days; however, the other day had cases with large differences. These differences are suspected to have been caused by a failure of the infra-red absorption sensor used to make the fast carbon dioxide measurements for the eddy-correlation technique.</p></div>","PeriodicalId":100139,"journal":{"name":"Atmospheric Environment. Part A. General Topics","volume":"27 15","pages":"Pages 2417-2426"},"PeriodicalIF":0.0000,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0960-1686(93)90409-R","citationCount":"103","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Environment. Part A. General Topics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/096016869390409R","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 103
Abstract
Businger and Oncley (1990; Flux measurement with conditional sampling, J. Atmos. Ocean Technol.7, 349–352) proposed a method to measure fluxes of scalar quantities by determining the mean concentration difference between air samples collected selectively during updrafts. This method has been tested for carbon dioxide over a growing cotton field where the fluxes were large. Simultaneous direct flux measurements were made using the eddy-correlation technique. These two techniques gave fluxes which were mostly within 20% on one of the two experiment days; however, the other day had cases with large differences. These differences are suspected to have been caused by a failure of the infra-red absorption sensor used to make the fast carbon dioxide measurements for the eddy-correlation technique.
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