T
Thomas Friborg
Researcher at University of Copenhagen
Publications - 92
Citations - 5916
Thomas Friborg is an academic researcher from University of Copenhagen. The author has contributed to research in topics: Eddy covariance & Permafrost. The author has an hindex of 38, co-authored 85 publications receiving 5021 citations. Previous affiliations of Thomas Friborg include Royal Institute of Technology.
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Journal ArticleDOI
A system to measure surface fluxes of momentum, sensible heat, water vapour and carbon dioxide
John Moncrieff,J. M. Massheder,H. A. R. De Bruin,Jan Elbers,Thomas Friborg,Bert G. Heusinkveld,Pavel Kabat,S L Scott,H. Soegaard,Anne Verhoef +9 more
TL;DR: An eddy covariance system is described in this paper, which uses commercially available instrumentation: a three-axis sonic anemometer and an IR gas analyser which is used in a closed-path mode.
Journal ArticleDOI
Thawing sub-arctic permafrost - effects on vegetation and methane emissions
Torben R. Christensen,Torbjörn Johansson,H. Jonas Åkerman,Mihail Mastepanov,Nils Malmer,Thomas Friborg,Patrick M. Crill,Bo H. Svensson +7 more
TL;DR: In this paper, the authors used a variety of data and information sources from the same region in subarctic Sweden to show that permafrost and vegetation changes have been associated with increases in landscape scale CH4 emissions in the range of 22-66% over the period 1970 to 2000.
Journal ArticleDOI
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing
Torbjörn Johansson,Nils Malmer,Patrick M. Crill,Thomas Friborg,Jonas Åkerman,Mikhail Mastepanov,Torben R. Christensen +6 more
TL;DR: In this paper, an analysis of permafrost thawing and subsequent vegetation changes in a sub-Arctic Swedish mire has changed the net exchange of greenhouse gases, carbon dioxide (CO2) and CH4 over the past three decades.
Journal ArticleDOI
Large loss of CO2 in winter observed across the northern permafrost region
Susan M. Natali,Jennifer D. Watts,Brendan M. Rogers,S. Potter,S. Ludwig,A. K. Selbmann,Patrick F. Sullivan,Benjamin W. Abbott,Kyle A. Arndt,Leah Birch,Mats P. Björkman,A. Anthony Bloom,Gerardo Celis,Torben R. Christensen,Casper T. Christiansen,Roisin Commane,Elisabeth J. Cooper,Patrick M. Crill,Claudia I. Czimczik,S. P. Davydov,Jinyang Du,Jocelyn Egan,Bo Elberling,Eugénie S. Euskirchen,Thomas Friborg,Hélène Genet,Mathias Göckede,Jordan P. Goodrich,Jordan P. Goodrich,Paul Grogan,Manuel Helbig,Manuel Helbig,Elchin Jafarov,Julie D. Jastrow,Aram Kalhori,Yongwon Kim,John S. Kimball,Lars Kutzbach,Mark J. Lara,Klaus Steenberg Larsen,Bang Yong Lee,Zhihua Liu,Michael M. Loranty,Magnus Lund,Massimo Lupascu,Nima Madani,Avni Malhotra,Roser Matamala,Jack W. McFarland,A. David McGuire,Anders Michelsen,Christina Minions,Walter C. Oechel,Walter C. Oechel,David Olefeldt,Frans-Jan W. Parmentier,Frans-Jan W. Parmentier,N. Pirk,N. Pirk,Ben Poulter,William L. Quinton,Fereidoun Rezanezhad,David Risk,Torsten Sachs,Kevin Schaefer,Niels Martin Schmidt,Edward A. G. Schuur,Philipp R. Semenchuk,Gaius R. Shaver,Oliver Sonnentag,Gregory Starr,Claire C. Treat,M. P. Waldrop,Yihui Wang,Jeffrey M. Welker,Jeffrey M. Welker,Christian Wille,Xiaofeng Xu,Zhen Zhang,Qianlai Zhuang,Donatella Zona,Donatella Zona +81 more
TL;DR: In this paper, the authors synthesize regional in situ observations of CO2 flux from Arctic and boreal soils to assess current and future winter carbon losses from the northern permafrost domain.
Journal ArticleDOI
Trace gas exchange in a high-arctic valley. 1 : Variations in CO2 and CH4 flux between tundra vegetation types
Torben R. Christensen,Thomas Friborg,M. Sommerkorn,Jed O. Kaplan,Lotte Illeris,Henrik Soegaard,Claus Nordstroem,Sven Jonasson +7 more
TL;DR: In this article, the authors studied the ecosystem exchanges of CO2 and CH4 in a high arctic valley at Zackenberg, NE Greenland and found that the grassland was a significant source of CH4 with a mean efflux of 6.3 mg CH4 and sinks for CO2, with almost -170 mg CO2 m(-2) hr(-1).