Journal ArticleDOI
Eddy covariance flux corrections and uncertainties in long-term studies of carbon and energy exchanges
William J. Massman,Xuhui Lee +1 more
TLDR
In this article, the authors extend the discussions of a US DOE sponsored workshop held on 30 and 31 May, 2000 in Boulder, CO concerning issues and uncertainties related to long-term eddy covariance measurements of carbon and energy exchanges.About:
This article is published in Agricultural and Forest Meteorology.The article was published on 2002-12-02. It has received 639 citations till now. The article focuses on the topics: Eddy covariance.read more
Citations
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Journal ArticleDOI
Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future
TL;DR: The eddy covariance method is most accurate when the atmospheric conditions (wind, temperature, humidity, CO2) are steady, the underlying vegetation is homogeneous and it is situated on flat terrain for an extended distance upwind as discussed by the authors.
Journal ArticleDOI
Towards a standardized processing of Net Ecosystem Exchange measured with eddy covariance technique: algorithms and uncertainty estimation
Dario Papale,Markus Reichstein,Marc Aubinet,E. Canfora,Christian Bernhofer,Werner L. Kutsch,Bernard Longdoz,Serge Rambal,R. Valentini,Timo Vesala,Dan Yakir +10 more
TL;DR: In this article, a new standardized set of corrections is introduced and the uncertainties associated with these corrections are assessed for eight different forest sites in Europe with a total of 12 yearly datasets.
Journal ArticleDOI
Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation
Beverly E. Law,Eva Falge,Lianhong Gu,Dennis D. Baldocchi,Peter S. Bakwin,Paul Berbigier,Kenneth J. Davis,A. J. Dolman,Matthias Falk,Jose D. Fuentes,Allen H. Goldstein,A. Granier,Achim Grelle,David Y. Hollinger,Ivan A. Janssens,Paul G. Jarvis,Niels Otto Jensen,Gabriel G. Katul,Y. Mahli,Giorgio Matteucci,Tilden P. Meyers,Russell K. Monson,William Munger,Walter C. Oechel,Richard J. Olson,Kim Pilegaard,H. Thorgeirsson,Riccardo Valentini,Shashi B. Verma,Timo Vesala,Kell B. Wilson,Steven C. Wofsy +31 more
TL;DR: The authors compared seasonal and annual estimates of CO2 and water vapor exchange across sites in forests, grasslands, crops, and tundra that are part of an international network called FLUXNET, and investigated the responses of vegetation to environmental variables.
Journal ArticleDOI
Tillage and soil carbon sequestration—What do we really know?
John M. Baker,John M. Baker,Tyson Ochsner,Tyson Ochsner,Rodney T. Venterea,Rodney T. Venterea,Timothy J. Griffis +6 more
TL;DR: Evidence that it promotes C sequestration is not compelling, because in essentially all cases where conservation tillage was found to sequester C, soils were only sampled to a depth of 30 cm or less, even though crop roots often extend much deeper.
Journal ArticleDOI
‘Breathing’ of the terrestrial biosphere: lessons learned from a global network of carbon dioxide flux measurement systems
TL;DR: Key findings reported include: ecosystems with the greatest net carbon uptake have the longest growing season, not the greatest FA; many old-growth forests act as carbon sinks; and year-to-year decreases in FN are attributed to a suite of stresses that decrease FA and FR in tandem.
References
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Journal ArticleDOI
Time series analysis
TL;DR: A ordered sequence of events or observations having a time component is called as a time series, and some good examples are daily opening and closing stock prices, daily humidity, temperature, pressure, annual gross domestic product of a country and so on.
Journal ArticleDOI
Correction of flux measurements for density effects due to heat and water vapour transfer
TL;DR: In this article, the basic relationships are discussed in the context of vertical transfer in the lower atmosphere, and the required corrections to the measured flux are derived, where the correction to measurements of water vapour flux will often be only a few per cent but will sometimes exceed 10 percent.
Journal ArticleDOI
Spectral Characteristics of Surface-Layer Turbulence
TL;DR: In this paper, the authors described the behavior of spectra and cospectra of turbulence in the surface layer using wind and temperature fluctuation data obtained in the 1968 AFCRL Kansas experiments.
Book ChapterDOI
Estimates of the annual net carbon and water exchange of forests: the EUROFLUX methodology
Marc Aubinet,Achim Grelle,Andreas Ibrom,Üllar Rannik,John Moncrieff,Thomas Foken,Andrew S. Kowalski,Philippe H. Martin,Paul Berbigier,Christian Bernhofer,Robert Clement,Jan Elbers,André Granier,Thomas Grünwald,K. Morgenstern,Kim Pilegaard,Corinna Rebmann,W. Snijders,Riccardo Valentini,Timo Vesala +19 more
TL;DR: In this article, the authors have described the measurement system and the procedure followed for the computation of the fluxes and procedure of flux summation, including data gap filling strategy, night flux corrections and error estimation.
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Correction of flux measurements for density effects due to heat and water vapour transfer
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Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future
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