Uncertainties in eddy covariance flux measurements assessed from CH4 and N2O observations
Kroon, P. S. ; Hensen, A. ; Jonker, H. J. J. ; Ouwersloot, H. G. ; Vermeulen, Alex LU
and Bosveld, F. C.
(2010)
In Agricultural and Forest Meteorology
150(6).
p.806-816
- Abstract
- The uncertainty in eddy covariance (EC) flux measurements is assessed for CH4 and N2O using data measured at a dairy farm site in the Netherlands in 2006 and 2007. An overview is given of the contributing uncertainties and their magnitude. The relative and absolute uncertainty of a 30 min EC flux are estimated for CH4 and N2O using N = 2185 EC fluxes. The average absolute uncertainty and its standard deviation are 500 +/- 400 ng C m(-2) s(-1) for CH4 and 100 +/- 100 ng N m(-2) s(-1) N2O. The corresponding relative uncertainties have 95% confidence interval ranging from 20% to 300% for CH4 and from 30% to 1800% for N2O. The large relative uncertainties correspond to relatively small EC fluxes. The uncertainties are mainly caused by the... (More)
- The uncertainty in eddy covariance (EC) flux measurements is assessed for CH4 and N2O using data measured at a dairy farm site in the Netherlands in 2006 and 2007. An overview is given of the contributing uncertainties and their magnitude. The relative and absolute uncertainty of a 30 min EC flux are estimated for CH4 and N2O using N = 2185 EC fluxes. The average absolute uncertainty and its standard deviation are 500 +/- 400 ng C m(-2) s(-1) for CH4 and 100 +/- 100 ng N m(-2) s(-1) N2O. The corresponding relative uncertainties have 95% confidence interval ranging from 20% to 300% for CH4 and from 30% to 1800% for N2O. The large relative uncertainties correspond to relatively small EC fluxes. The uncertainties are mainly caused by the uncertainty due to one-point sampling which contributes on average more than 90% to the total uncertainty. The other 10% includes the uncertainty in the correction algorithm for the systematic errors. The uncertainty in a daily and monthly averaged EC flux are estimated for several flux magnitude ranges. The daily and monthly average uncertainty are smaller than 25% and 10% for CH4 and smaller than 50% and 10% for N2O, respectively, based on fluxes larger than 100 ng C m(-2) s(-1) and 15 ng N m(-2) s(-1). (C) 2009 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4623916
- author
- Kroon, P. S.
; Hensen, A.
; Jonker, H. J. J.
; Ouwersloot, H. G.
; Vermeulen, Alex
LU
and Bosveld, F. C.
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- uncertainty, N2O fluxes, CH4 fluxes, correction
- in
- Agricultural and Forest Meteorology
- volume
- 150
- issue
- 6
- pages
- 806 - 816
- publisher
- Elsevier
- external identifiers
-
- wos:000280076400007
- scopus:77954145056
- ISSN
- 1873-2240
- DOI
- 10.1016/j.agrformet.2009.08.008
- language
- English
- LU publication?
- no
- id
- 0d2bc1bc-d437-4d8e-9505-9a3539e0f29b (old id 4623916)
- date added to LUP
- 2016-04-01 14:49:28
- date last changed
- 2022-03-22 02:08:19
@article{0d2bc1bc-d437-4d8e-9505-9a3539e0f29b,
abstract = {{The uncertainty in eddy covariance (EC) flux measurements is assessed for CH4 and N2O using data measured at a dairy farm site in the Netherlands in 2006 and 2007. An overview is given of the contributing uncertainties and their magnitude. The relative and absolute uncertainty of a 30 min EC flux are estimated for CH4 and N2O using N = 2185 EC fluxes. The average absolute uncertainty and its standard deviation are 500 +/- 400 ng C m(-2) s(-1) for CH4 and 100 +/- 100 ng N m(-2) s(-1) N2O. The corresponding relative uncertainties have 95% confidence interval ranging from 20% to 300% for CH4 and from 30% to 1800% for N2O. The large relative uncertainties correspond to relatively small EC fluxes. The uncertainties are mainly caused by the uncertainty due to one-point sampling which contributes on average more than 90% to the total uncertainty. The other 10% includes the uncertainty in the correction algorithm for the systematic errors. The uncertainty in a daily and monthly averaged EC flux are estimated for several flux magnitude ranges. The daily and monthly average uncertainty are smaller than 25% and 10% for CH4 and smaller than 50% and 10% for N2O, respectively, based on fluxes larger than 100 ng C m(-2) s(-1) and 15 ng N m(-2) s(-1). (C) 2009 Elsevier B.V. All rights reserved.}},
author = {{Kroon, P. S. and Hensen, A. and Jonker, H. J. J. and Ouwersloot, H. G. and Vermeulen, Alex and Bosveld, F. C.}},
issn = {{1873-2240}},
keywords = {{uncertainty; N2O fluxes; CH4 fluxes; correction}},
language = {{eng}},
number = {{6}},
pages = {{806--816}},
publisher = {{Elsevier}},
series = {{Agricultural and Forest Meteorology}},
title = {{Uncertainties in eddy covariance flux measurements assessed from CH4 and N2O observations}},
url = {{http://dx.doi.org/10.1016/j.agrformet.2009.08.008}},
doi = {{10.1016/j.agrformet.2009.08.008}},
volume = {{150}},
year = {{2010}},
}