Thomas Friborg

Thomas Friborg

Professor

ORCID: 0000-0001-5633-6097

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  1. Published

    20 years of methane measurements has sharpened our understanding

    Sigsgaard, Charlotte, Friborg, Thomas, Pirk, N., Lund, M., Hansen, Birger, Skov, K. & Mastepanov, M., 2017, Annual Report Card 2016: Greenland Ecosystem Monitoring. Christensen, T. R. & Topp-Jørgensen, E. (eds.). Aarhus: University of Aarhus, p. 12-13 2 p.

    Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Communication

  2. Published

    A catchment scale process study of carbon and greenhouse gas exchange in a subarctic landscape

    Christensen, T. R., Johansson, P. T., Olsrud, M., Ström, L., Lindroth, A., Mastepanov, M., Malmer, N., Friborg, Thomas, Crill, P. M. & Callaghan, T. V., 2008.

    Research output: Contribution to conference › Poster › Research

  3. Published

    A catchment-scale carbon and greenhouse gas budget of a subarctic landscape

    Christensen, T. R., Johansson, P. T., Olsrud, M., Ström, L., Lindroth, A., Mastepanov, M., Malmer, N., Friborg, Thomas, Crill, P. & Callaghan, T., 2007, In: Philosophical Transactions of the Royal Society, Series A. 365, 1856, p. 1643-1656

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. Published

    A system to measure surface fluxes of momentum, sensible heat, water vapour and carbon dioxide

    Moncrieff, J. B., Massheder, J. M., de Bruin, H., Elbers, J., Friborg, Thomas, Huesunkveld, B., Kabat, P., Scott, S., Søgaard, H. & Verhoef, A., 1997, In: Journal of Hydrology. 188-189, 1-4, p. 589-611

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    Above-Ground Biomass Prediction for Croplands at a Sub-Meter Resolution Using UAV–LiDAR and Machine Learning Methods

    Caballer Revenga, Jaime, Trepekli, Aikaterini, Oehmcke, Stefan, Jensen, Rasmus, Li, Lei, Igel, Christian, Gieseke, Fabian Cristian & Friborg, Thomas, 2022, In: Remote Sensing. 14, 16, 22 p., 3912.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Annual cycle of methane emission from a subarctic peatland

    Jackowicz-Korczynski, M., Christensen, T. R., Bäckstrand, K., Crill, P., Friborg, Thomas, Mastepanov, M. & Ström, L., May 2010, In: Journal of Geophysical Research - Atmospheres. 115

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    Annual cycles of methane emission from a subarctic peatland

    Jackowicz-Korczyňski, M., Christensen, T. R., Bäckstrand, K., Crill, P. M., Friborg, Thomas, Mastepanov, M. & Ström, L., 2009, Land-atmosphere interaction of a subarctic palsa mire. 184 ed. p. 25-32 8 p. (Meddelanden fran Lunds Universitets Geografiska Institutioner, Avhandlingar; No. 184).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  8. Published

    Application of drone borne LiDAR technology for monitoring agricultural biomass and plant growth.

    Trepekli, Aikaterini, Westergaard-Nielsen, Andreas & Friborg, Thomas, 2020. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

  9. Published

    Arctic vegetation damage by winter-generated coal mining pollution released upon thawing

    Elberling, Bo, Søndergaard, J. E., Jensen, L. A., Schmidt, L. B., Hansen, Birger, Asmund, G., Balic Zunic, Tonci, Hollesen, J., Hanson, S., Jansson, P. & Friborg, Thomas, 2007, In: Environmental Science & Technology (Washington). 41, p. 2407-2413

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Assessing the potential capabilities of UAV-Lidar scanners, thermal and multispectral cameras to upscale energy heat fluxes in ICOS stations

    Trepekli, Aikaterini, Westergaard-Nielsen, Andreas & Friborg, Thomas, 2019. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

  11. Published

    Assessing the spatial variability in peak season CO2 exchange characteristics across the Arctic tundra using a light response curve parameterization

    Mbufong, H. N., Lund, M., Aurela, M., Christensen, T. R., Eugster, W., Friborg, Thomas, Hansen, Birger, Humphreys, E. R., Jackowicz-Korczynski, M., Kutzbach, L., Lafleur, P. M., Oechel, W. C., Parmentier, F. J. W., Rasse, D. P., Rocha, A. V., Sachs, T., van der Molen, M. K. & Tamstorf, M. P., 2014, In: Biogeosciences. 11, 17, p. 4897-4912 16 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Atmospheric fluxes of CO2 and CH4 above a high arctic ecosystem from spring to atumn

    Nordstrøm, C., Friborg, Thomas, Hansen, Birger & Søgaard, H., 1997.

    Research output: Contribution to conference › Paper › Research › peer-review

  13. Published

    BVOC ecosystem flux measurements at a high latitude wetland site

    Holst, T., Arneth, A., Hayward, S., Mastepanov, M., Jackowicz-Korczynski, M., Friborg, Thomas, Crill, P. & Bäckstrand, K., 2010, In: Atmospheric Chemistry and Physics. 10, p. 1617–1634 17 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    BVOC ecosystem flux measurements at a high latitude wetland site

    Holst, T., Ameth, A., Hayward, S., Ekberg, A., Mastepanov, M., Jackowicz-Korczyñski, M., Friborg, Thomas, Crill, P. M. & Bïckstrand, K., 2009, Land-atmosphere interaction of a subarctic palsa mire. 184 ed. p. 69-82 14 p. (Meddelanden fran Lunds Universitets Geografiska Institutioner, Avhandlingar; No. 184).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  15. Published

    Biogenic controls on trace gas fluxes in northern wetlands

    Christensen, T. R., Lloyd, D., Svensson, B., Matikainen, P. J., Harding, R., Oskasson, H., Friborg, Thomas, Søgaard, H. & Panikov, N., 2002, (Global Change IGBP News Letter, Vol. 2002).

    Research output: Book/Report › Book › Research › peer-review

  16. Published

    Biotic, abiotic, and management controls on the net ecosystem CO2 exchange of European mountain grassland ecosystems

    Wohlfahrt, G., Friborg, Thomas & Johansson et.al., P. T., 2008, In: Ecosystems. 11, 8, p. 1338-1351

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Bulk Transfer Coefficients Estimated From Eddy-Covariance Measurements Over Lakes and Reservoirs

    Guseva, S., Armani, F., Desai, A. R., Dias, N. L., Friborg, Thomas, Iwata, H., Jansen, J., Lükő, G., Mammarella, I., Repina, I., Rutgersson, A., Sachs, T., Scholz, K., Spank, U., Stepanenko, V., Torma, P., Vesala, T. & Lorke, A., 27 Jan 2023, In: Journal of Geophysical Research: Atmospheres. 128, 2, 20 p., e2022JD037219.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Carbon dioxide and methane dynamics in Russian tundra

    Johansson, P. T., Kiepe, I., Herbst, M., Søgaard, H. & Friborg, Thomas, 2008.

    Research output: Contribution to conference › Poster › Research

  19. Published

    Carbon dioxide balance of subarctic tundra from plot to regional scales

    Marushchak, M. E., Kiepe, I., Biasi, C., Elsakov, V., Friborg, Thomas, Johansson, P. T., Søgaard, H., Virtanen, T. & Martikainen, P. J., 2013, In: Biogeosciences. 10, 1, p. 437-452 16 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Carbon dioxide exchange of the Arctic tundra in the northern part of European Russia

    Kiepe, I., Johansson, P. T., Friborg, Thomas & Søgaard, H., 2008.

    Research output: Contribution to conference › Poster › Research

  21. Published

    Carbon dioxide flux, transpiration and light response of millet in Sahel

    Friborg, Thomas, Bøgh, E. & Søgaard, H., 1997, In: Journal of Hydrology. 188-189, 1-4, p. 633-650

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    Carbon stocks and fluxes in the high latitudes: Using site-level data to evaluate Earth system models

    Chadburn, S., Krinner, G., Porada, P., Bartsch, A., Beer, C., Marchesini, L. B., Boike, J., Elberling, B., Friborg, T., Hugelius, G., Johansson, M., Kuhry, P., Kutzbach, L., Langer, M., Lund, M., Parmentier, F-J., Peng, S., Huissteden, K. V., Wang, T., Westermann, S. & 2 others, Zhu, D. & Burke, E., 2017, Copernicus/EGU, 41 p. (Biogeosciences Discussions; No. 197, Vol. 2017).

    Research output: Working paper › Preprint › Research

  23. Published

    Carbon stocks and fluxes in the high latitudes: using site-level data to evaluate Earth system models

    Chadburn, S. E., Krinner, G., Porada, P., Bartsch, A., Beer, C., Marchesini, L. B., Boike, J., Ekici, A., Elberling, B., Friborg, T., Hugelius, G., Johansson, M., Kuhry, P., Kutzbach, L., Langer, M., Lund, M., Parmentier, F-J. W., Peng, S., Van Huissteden, K., Wang, T. & 3 others, Westermann, S., Zhu, D. & Burke, E. J., 2017, In: Biogeosciences. 14, 22, p. 5143-5169 27 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Catchment-Wide Atmospheric Greenhouse Gas Exchange as Influenced by Land Use Diversity

    Herbst, M., Friborg, Thomas, Ringgaard, R. & Søgaard, H., 27 Jan 2011, In: Vadose Zone Journal. 10, 1, p. 67 - 77 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Causality guided machine learning model on wetland CH4 emissions across global wetlands

    Yuan, K., Zhu, Q., Li, F., Riley, W. J., Torn, M., Chu, H., McNicol, G., Chen, M., Knox, S., Delwiche, K., Wu, H., Baldocchi, D., Ma, H., Desai, A. R., Chen, J., Sachs, T., Ueyama, M., Sonnentag, O., Helbig, M., Tuittila, E-S. & 18 others, Jurasinski, G., Koebsch, F., Campbell, D., Schmid, H. P., Lohila, A., Goeckede, M., Nilsson, M. B., Friborg, Thomas, Jansen, J., Zona, D., Euskirchen, E., Ward, E. J., Bohrer, G., Jin, Z., Liu, L., Iwata, H., Goodrich, J. & Jackson, R., 2022, In: Agricultural and Forest Meteorology. 324, 10 p., 109115.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    Changes in Climate, permafrost and vegetation-effects on subarctic methane emission

    Christensen, T. R., Johansson, T., Malmer, N., Åkerman, J., Friborg, Thomas, Crill, P. & Svensson, B., 2004, In: Geophysical Research Letters. 31, 4

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    Climate and site management as driving factors for the atmospheric greenhouse gas exchange of a restored wetland

    Herbst, M., Friborg, Thomas, Schelde, K., Jensen, Rasmus, Ringgaard, R., Vasquez, V., Thomsen, A. G. & Søgaard, H., 2013, In: Biogeosciences. 10, 1, p. 39-52 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    Climate-Sensitive Controls on Large Spring Emissions of CH4 and CO2 From Northern Lakes

    Jansen, J., Thornton, B. F., Jammet, M. M., Wik, M., Cortes, A., Friborg, Thomas, MacIntyre, S. & Crill, P. M., 2019, In: Journal of Geophysical Research: Biogeosciences. 124, 7, p. 2379-2399 21 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    Comparing Evapotranspiration Rates Estimated from Atmospheric Flux and TDR Soil Moisture Measurements

    Schelde, K., Ringgaard, R., Herbst, M., Thomsen, A. G., Friborg, Thomas & Søgaard, H., 1 Feb 2011, In: Vadose Zone Journal. 10, 1, p. 78-83 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. Published

    Controls on the greenhouse gas exchange of a high-arctic ecosystem

    Friborg, Thomas, Søgaard, H., Nordstrøm, C. & Hansen, Birger, 1999, In: Geografisk Tidsskrift. 99, p. 19-26

    Research output: Contribution to journal › Journal article › Research

  31. Published

    Crop water stress maps for an entire growing season from visible and thermal UAV imagery

    Nielsen, H. H. M., Jensen, Rasmus, Thomsen, A. G., Nieto Solana, H., Rasmussen, Jesper & Friborg, Thomas, 2016, In: Biogeosciences. 13, 24, p. 6545-6563 19 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing

    Johansson, T., Malmer, N., Crill, P. M., Friborg, Thomas, Akerman, J., Mastepanov, M., Christensen, T. R. & Johansson, P. T., 2006, In: Global Change Biology. 12, p. 2352-2369

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Deriving Aerodynamic Roughness Length at Ultra-High Resolution in Agricultural Areas Using UAV-Borne LiDAR

    Trepekli, Aikaterini & Friborg, Thomas, 2021, In: Remote Sensing. 13, 17, 21 p., 3538.

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Direct and indirect controls of the interannual variability in atmospheric CO2 exchange of three contrasting ecosystems in Denmark

    Jensen, Rasmus, Herbst, M. & Friborg, Thomas, 2017, In: Agricultural and Forest Meteorology. 233, p. 12-31 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    DiskoBasis monitering

    Sigsgaard, Charlotte, Jørgensen, C. J., Christiansen, C. T., Hansen, Per Juel, Christoffersen, Kirsten Seestern, McConnell, A., Mølgaard, K. A., Kroon, Aart, Friborg, Thomas, Hansen, Birger & Elberling, Bo, 2017, Arctic Station Annual Report 2015. Kroon, A. & Sigsgaard, C. (eds.). København: Københavns Universitet, p. 7-13 7 p. (Annual Report).

    Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Research › peer-review

  36. Published

    Drivhusgasbalancen i den nordøstlige del af Rusland

    Kiepe, I., Johansson, P. T., Friborg, Thomas, Rasmusen, E. & Søgaard, H., 2008, Geografi: årsskrift for selskabets aktiviteter og geografien ved danske universiteter. Det Kongelige Danske Geografiske Selskab, Vol. 2007. p. 47-50

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

  37. Published

    Dynamics of the carbon circulation in a High Arctic ecosystem - comprising atmospheric, terrrestrial, fluvial and marine components

    Søgaard, H., Rysgaard, S., Sørensen, L., Larsen, S. & Friborg, Thomas, 2006, ?. 79 ed. Helsinki: University of Helsinki, p. 1

    Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research

  38. Published

    Eddy correlation of the methane exchange over a High-Arctic fen

    Friborg, Thomas, Søgaard, H., Nordstrøm, C., Hansen, Birger & Christensen, T. R., 1999, In: Geophysical Research Abstracts. Vol 1, no. 2, p. 571-571

    Research output: Contribution to journal › Journal article › Research

  39. Published

    Energy Fluxes above Three Disparate Surfaces in a Temperate Mesoscale Coastal Catchment

    Ringgaard, R., Herbst, M., Friborg, Thomas, Schelde, K., Thomsen, A. G. & Søgaard, H., 1 Feb 2011, In: Vadose Zone Journal. 10, 1, p. 54-66 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Environmental control of methane fluxes over a Danish peatland

    Herbst, M., Friborg, Thomas, Ringgaard, R. & Søgaard, H., 2009.

    Research output: Contribution to conference › Poster › Research

  41. Published

    Episodical CO2 emission during shoulder seasons in the arctic

    Friborg, Thomas, Elberling, Bo, Hansen, Birger, Lund, M. & Mastepanov, M., 12 Dec 2010.

    Research output: Contribution to conference › Poster › Research

  42. Published

    Estimating evaporation with thermal UAV data and two-source energy balance models

    Hoffmann, H., Nieto Solana, H., Jensen, Rasmus, Guzinski, R., Zarco-Tejada, P. & Friborg, Thomas, 2016, In: Hydrology and Earth System Sciences. 20, 2, p. 697-713

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Explicitly modelling microtopography in permafrost landscapes in a land surface model (JULES vn5.4_microtopography)

    Smith, N. D., Burke, E. J., Aas, K. S., Althuizen, I. H. J., Boike, J., Christiansen, C. T., Etzelmüller, B., Friborg, Thomas, Lee, H., Rumbold, H., Turton, R. H., Westermann, S. & Chadburn, S. E., 2022, In: Geoscientific Model Development. 15, 9, p. 3603-3639 37 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. Published

    Explicitly modelling microtopography in permafrost landscapes in a land-surface model (JULES vn5.4_microtopography)

    Smith, N. D., Chadburn, S. E., Burke, E. J., Aas, K. S., Althuizen, I. H. J., Boike, J., Christiansen, C. T., Etzelmüller, B., Friborg, Thomas, Lee, H., Rumbold, H., Turton, R. & Westermann, S., 2021, 43 p.

    Research output: Working paper › Preprint › Research

  45. Published

    Extreme Rain event -what are the consequences for Arctic Ecosytems

    Sigsgaard, Charlotte, Lund, M., Abermann, J., Skov, K., Friborg, Thomas & Hansen, Birger, 2018, Annual Report Cards 2017. Christensen, T. R. & Topp-Jørgensen, E. (eds.). 1 ed. Aarhus: University of Aarhus, p. 26-27 2 p.

    Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Communication

  46. Published

    FLUXNET-CH4 Synthesis Activity: Objectives, Observations, and Future Directions

    Knox, S. H., Jackson, R. B., Poulter, B., McNicol, G., Fluet-Chouinard, E., Zhang, Z., Hugelius, G., Bousquet, P., Canadell, J. G., Saunois, M., Papale, D., Chu, H., Keenan, T. F., Baldocchi, D., Torn, M. S., Mammarella, I., Trotta, C., Aurela, M., Bohrer, G., Campbell, D. I. & 46 others, Cescatti, A., Chamberlain, S., Chen, J., Chen, W., Dengel, S., Desai, A. R., Euskirchen, E., Friborg, Thomas, Gasbarra, D., Goded, I., Goeckede, M., Heimann, M., Helbig, M., Hirano, T., Hollinger, D. Y., Iwata, H., Kang, M., Klatt, J., Krauss, K. W., Kutzbach, L., Lohila, A., Mitra, B., Morin, T. H., Nilsson, M. B., Niu, S., Noormets, A., Oechel, W. C., Peichl, M., Peltola, O., Reba, M. L., Richardson, A. D., Runkle, B. R. K., Ryu, Y., Sachs, T., Schaefer, K. V. R., Schmid, H. P., Shurpali, N., Sonnentag, O., Tang, A. C. ,. I., Ueyama, M., Vargas, R., Vesala, T., Ward, E. J., Windham-Myers, L., Wohlfahrt, G. & Zona, D., 2019, In: Bulletin of the American Meteorological Society. 100, 12, p. 2607-2632 26 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  47. Published

    Field-scale CH4 emission at a sub-arctic mire with heterogeneous permafrost thaw status

    Łakomiec, P., Holst, J., Friborg, Thomas, Crill, P., Rakos, N., Kljun, N., Olsson, P., Eklundh, L. & Rinne, J., 2021, Copernicus/EGU, 32 p. (Biogeosciences Discussions; No. 81, Vol. 2021).

    Research output: Working paper › Preprint › Research

  48. Published

    Field-scale CH4 emission at a subarctic mire with heterogeneous permafrost thaw status

    Łakomiec, P., Holst, J., Friborg, Thomas, Crill, P., Rakos, N., Kljun, N., Olsson, P., Eklundh, L., Persson, A. & Rinne, J., 2021, In: Biogeosciences. 18, 20, p. 5811-5830 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    Forøger vådområder den globale opvarmning?

    Herbst, M., Friborg, Thomas, Ringgaard, R. & Søgaard, H., 2009, In: Vand og Jord. 16, 3, p. 84-89 6 p.

    Research output: Contribution to journal › Journal article › Research

  50. Published

    Fremtidens vandressourcer i Danmark [Klimaændringer]

    Sonnenborg, T., Jensen, Karsten Høgh, Søgaard, H., Friborg, Thomas, Engesgaard, P. K. & Kidmose, J. B., 2009, In: Geoviden. 2, p. 2-15 14 p.

    Research output: Contribution to journal › Journal article › Communication

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