A
Achim Grelle
Researcher at Swedish University of Agricultural Sciences
Publications - 64
Citations - 14563
Achim Grelle is an academic researcher from Swedish University of Agricultural Sciences. The author has contributed to research in topics: Eddy covariance & Ecosystem. The author has an hindex of 35, co-authored 62 publications receiving 13651 citations.
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Addressing the influence of instrument surface heat exchange on the measurements of CO2 flux from open‐path gas analyzers
TL;DR: In this article, a series of laboratory tests and field experiments were conducted to determine the magnitude of the instrument surface heat exchange in the open path and its relationship with the measured CO 2 flux.
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Air temperature triggers the recovery of evergreen boreal forest photosynthesis in spring
Suni Tanja,Frank Berninger,Timo Vesala,Tiina Markkanen,Pertti Hari,Annikki Mäkelä,Hannu Ilvesniemi,Heikki Hänninen,Eero Nikinmaa,Timo Huttula,Tuomas Laurila,Mika Aurela,Achim Grelle,Anders Lindroth,Almut Arneth,Olga Shibistova,Jon Lloyd +16 more
TL;DR: In this paper, the authors investigated the environmental cues initiating the spring recovery of boreal coniferous forest ecosystems under field conditions, and found that air temperature emerged as the best predictor for P-* in spring.
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Energy partitioning between latent and sensible heat flux during the warm season at FLUXNET sites
Kell B. Wilson,Dennis D. Baldocchi,Marc Aubinet,Paul Berbigier,Christian Bernhofer,Han Dolman,Eva Falge,Christopher B. Field,Allen H. Goldstein,A. Granier,Achim Grelle,Thorgeirsson Halldor,D.Y. Hollinger,Gabriel G. Katul,Beverly E. Law,Anders Lindroth,Tilden P. Meyers,John Moncrieff,Russell K. Monson,Walter C. Oechel,John Tenhunen,Riccardo Valentini,Shashi B. Verma,Timo Vesala,S. C. Wofsy +24 more
TL;DR: In this article, the Bowen ratio (H/LE) was investigated at 27 sites over 66 site years within the international network of eddy covariance sites (FLUXNET) by quantifying general climatic and surface characteristics that control flux partitioning.
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Annual CO2 exchange between a nutrient-poor, minerotrophic, boreal mire and the atmosphere
Jörgen Sagerfors,Anders Lindroth,Achim Grelle,Leif Klemedtsson,Per Weslien,Marie-Charlotte Nilsson +5 more
TL;DR: In this paper, the authors present data from 3 a (2001-2003) of continuous Eddy Covariance measurements at Degero Stormyr (64 degrees 11'N, 19 degrees 33'E) an oligotrophic, minerotrophic mire in Sweden.
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Phase and amplitude of ecosystem carbon release and uptake potentials as derived from FLUXNET measurements
Eva Falge,John Tenhunen,Dennis D. Baldocchi,Marc Aubinet,Peter S. Bakwin,Paul Berbigier,Christian Bernhofer,Jean-Marc Bonnefond,George Burba,Robert Clement,Kenneth J. Davis,Jan Elbers,Matthias Falk,Allen H. Goldstein,Achim Grelle,A. Granier,Thomas Grünwald,Jón Guðmundsson,David Y. Hollinger,Ivan A. Janssens,Petri Keronen,Andrew S. Kowalski,Gabriel G. Katul,Beverly E. Law,Yadvinder Malhi,Tilden P. Meyers,Russell K. Monson,Eddy Moors,J. William Munger,Walter C. Oechel,Kyaw Tha Paw U,Kim Pilegaard,Üllar Rannik,Corinna Rebmann,Andrew E. Suyker,H. Thorgeirsson,Giampiero Tirone,Andrew E. Turnipseed,Kell B. Wilson,Steven C. Wofsy +39 more
TL;DR: In this paper, seasonal patterns of net ecosystem carbon exchange (FNEE) using eddy covariance data of the FLUXNET data base ( http://www-eosdis.ornl.gov/FLUXNET ).