Helge Ro-Poulsen
Emeritus
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Effects of increased UV-B radiation and elevated levels of tropospheric ozone on physiological processes in European Beech (Fagus sylvatica)
Zeuthen, J., Mikkelsen, T. N., Ro-Poulsen, Helge & Paludan-Müller, G., 1997, In: Physiologia Plantarum : An International Journal for Plant Biology. 100, p. 281-290Research output: Contribution to journal › Journal article › Research › peer-review
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Comparisons of measured and modelled ozone deposition to forests in northern Europe
Touvinen, J. P., Simpson, D., Mikkelsen, T. N., Emberson, L. D., Ashmore, M. R., Aurela, M., Cambridge, H. M., Hovmand, Mads Frederik, Jensen, N. O., Laurila, T., Pilegaard, K. & Ro-Poulsen, Helge, 2001, In: Water, Air & Soil Pollution: Focus. 1, 5, p. 263-274 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Impacts of ozone on forests: A European perspective
Skärby, L., Ro-Poulsen, Helge, Wellburn, F. A. M. & Sheppard, L. J., 1998, In: New Phytologist. 139, p. 109-122Research output: Contribution to journal › Journal article › Research › peer-review
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Responses of carbon and water fluxes following drought events in combinations with warming and elevated CO2
Selsted, M. B., Albert, K., Ambus, Per Lennart, Michelsen, Anders, Ro-Poulsen, Helge, Mikkelsen, T. N. & Ibrom, A., 2009, In: Metlan Tyoraportteja. p. 144Research output: Contribution to journal › Conference abstract in journal › Research
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Ecosystem Recovery after Drought Events in Our Future Climate
Selsted, M. B., Albert, K., Ambus, Per Lennart, Michelsen, Anders, Ro-Poulsen, Helge, Mikkelsen, T. N. & Ibrom, A., 2009, In: Institute of Physics Conference Series.Research output: Contribution to journal › Conference abstract in journal › Research
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Klimaændringer og processer og funktion i terrestiske økosystemer
Schmidt, Inger Kappel, Beier, C., Nielsen, Jane Kongstad, Andresen, L., Michelsen, Anders, Albert, K., Ambus, Per Lennart, Selsted, M., Maraldo, K., Holmstrup, M., Arndal, M. F., Mikkelsen, T. N., Ro-Poulsen, Helge, Jonassen, S. & Karsten, R. J., 2007, In: Flora og Fauna. 113, 4, p. 117-128 12 p.Research output: Contribution to journal › Journal article › Research
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Plant eco-physiological response patterns to summer drought, elevated CO2, and warming in a semi-natural temperate heath ecosystem
Ro-Poulsen, Helge, Albert, K., Mikkelsen, T. N. & Michelsen, Anders, 2008.Research output: Contribution to conference › Conference abstract for conference › Research
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Monitering af UV-belastningen af vegetationen i Zackenberg. Tre års undersøgelser af UV-B effekter på højarktisk vegetation i NØ-Grøndland, Zackenberg. Opsummerende rapport til Miljøstyrelsen vedr. DANCEA-bevilling J.nr.M 123/000-0212
Ro-Poulsen, Helge, Albert, K. & N. Mikkelsen, T., 2004, 12 p.Research output: Book/Report › Report › Communication
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Effects of UV-B radiation on vegetation in Zackenberg: In Rasch, M. and Caning, K. (eds.) Zackenberg Ecological Research Operations, 9th Annual Report, 2003. - Copenhagen, Danish Polar Center, Ministry of Science, Technology and Innovation
Ro-Poulsen, Helge, N. Mikkelsen, T., Bredahl, L., Albert, K., B. Håkansson, K. & Rinnan, R., 2004Research output: Book/Report › Report › Communication
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Ozone deposition in relation to canopy physiology in a mixed conifer forest in Denmark
Ro-Poulsen, Helge, Mikkelsen, T. N., Hovmand, Mads Frederik, Hummelshøj, P. & Jensen, N. O., 1998, In: Chemosphere. 36, 4-5, p. 669-674 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Unpredictable responses to interactions between climatic drivers: Impact of warming, elevated CO2, drought and their combinations on photosynthesis and growth patterns of heath plants
Ro-Poulsen, Helge, Albert, K., Michelsen, Anders, Mikkelsen, T. N. & Beier, C., 2009, In: Metlan Tyoraportteja. p. 346Research output: Contribution to journal › Conference abstract in journal › Research
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Ambient ultraviolet radiation in the Arctic reduces root biomass and alters microbial community composition but has no effects on microbial biomass
Rinnan, R., Keinänen, M. M., Kasurinen, A., Asikainen, J., Kekki, T. K., Holopainen, T., Ro-Poulsen, Helge, Mikkelsen, T. N. & Michelsen, Anders, 2005, In: Global Change Biology. 11, 4, p. 564 - 574Research output: Contribution to journal › Journal article › Research › peer-review
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Field measurements of atmosphere-surface interactions in a Danish beech forest
Pilegaard, K., Mikkelsen, T. N., Beier, C., Jensen, N. O., Ambus, Per Lennart & Ro-Poulsen, Helge, 2003, In: Boreal Environmental Research. 8, p. 315-333Research output: Contribution to journal › Journal article › Research › peer-review
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Field measurements of atmosphere-biosphere interactions in a Danish beech forest
Pilegaard, K., Mikkelsen, T., Beier, Claus, Jensen, N., Ambus, Per Lennart & Ro-Poulsen, Helge, 10 Dec 2003, In: Boreal Environment Research. 8, 4, p. 315-333 19 p.Research output: Contribution to journal › Journal article › Research › peer-review
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CLIMAITE - a three factor climate change ecosystem manipulation experiment: Geophysical Research Abstracts, Vol. 10, EGU2008-A-07931, 2008. SRef-ID: 1607-7962/gra/EGU2008-A-07931. EGU General Assembly 13-18 April 2008 in Vienna, Switzerland
N. Mikkelsen, T., Beier, C., Jonasson, S. E., Holmstrup, M., Schmidt, I. K., Ambus, P. L., Pilegaard, K., Michelsen, A., Albert, K., Andresen, L. C., Arndal, M. F., Bruun, N., Christensen, S., Danbæk, S., Gundersen, P., Jørgensen, P., J. Linden, L., Pedersen, J. K., Maraldo, K., Priemé, A. & 11 others, , 2008.Research output: Contribution to conference › Conference abstract for conference › Research
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CLIMAITE – a three factor climate change ecosystem manipulation experiment
N. Mikkelsen, T., Beier, C., Albert, K. & Ro-Poulsen, Helge, 2007, In: Geophysical Research Abstracts. 10Research output: Contribution to journal › Conference abstract in journal › Research
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Effects of UV-B radiation on vegetation in Zackenberg: In Rasch, M. and Caning, K. (eds.) Zackenberg Ecological Research Operations, 8th Annual Report, 2002. - Copenhagen, Danish Polar Center, Ministry of Science, Technology and Innovation, 2003.
N. Mikkelsen, T., Ro-Poulsen, Helge, Bredahl, L. & Albert, K., 2003Research output: Book/Report › Report › Communication
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Critical levels of ozone for wood production of European beech (Fagus Sylvatica L.)
Mortensen, L., Bastrup-Birk, A. & Ro-Poulsen, Helge, 1996, In: Water, Air and Soil Pollution. 85, p. 1349-1354Research output: Contribution to journal › Journal article › Research
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Critical levels for tropospheric ozone
Mikkelsen, T. N., Ro-Poulsen, Helge & et al, 1994, København: Nordic Council of Ministers. 63 p.Research output: Book/Report › Book › Research
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Carbon and water balance for a mixed forest stand in relation to ozone uptake
Mikkelsen, T. N., Ro-Poulsen, Helge, Hovmand, M. F., Hummelshøj, P. & Jensen, N. O., 1996, Critical levels for Ozone-Experiments with crops, wild plants and forest tree species in the Nordic countries. København: Nordic Council of Ministers, p. 80-85Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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In situ Autumn ozone fumigation of mature Norway Spruce - Effects on Net Photosynthesis
Mikkelsen, T. N. & Ro-Poulsen, Helge, 2002, In: Phyton (Austria). 42, p. 97-104Research output: Contribution to journal › Journal article › Research › peer-review
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Long term in situ measurements of gas exchange in a Norway spruce canopy at ambient and elevated ozone levels using a light weight chamber system - chamber design and preliminary results
Mikkelsen, T. N. & Ro-Poulsen, Helge, 1995, In: Water, Air and Soil Pollution. 85 (3), p. 1413-1418Research output: Contribution to journal › Journal article › Research › peer-review
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Carbon dioxide fluxes above a coniferous/hardwood stand in relation to climate - consecutive measurements from 17 months
Mikkelsen, T. N., Ro-Poulsen, Helge, Hummelshøj, P. & Jensen, N. O., 1997, Impacts of global change on tree physiology and forest ecosystems, Forestry Sciences, vol. 52. Dordrecht, Holland: Kluwer Academic Publishers, p. 331-336Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Exposure of Norway spruce to ozone increases the sensitivity of current years needles to photoinhibition and desiccation
Mikkelsen, T. N. & Ro-Poulsen, Helge, 1994, In: New Phytologist. 128, p. 153-163Research output: Contribution to journal › Journal article › Research › peer-review
ID: 7631
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2124
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Solar Ultraviolet-B radiation at Zackenberg: The impact on higher plants and soil microbial communities: In: High-arctic ecosystem dynamics in a changing climate (eds H. Meltofte, T.R. Christensen, B. Elberling, M. Forchhammer, M. Rasch)
Research output: Book/Report › Anthology › Research › peer-review
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1477
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Ambient UV-B radiation decreases photosynthesis in high arctic Vaccinium uliginosum.
Research output: Contribution to journal › Journal article › Research › peer-review
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939
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The Biological Time Machine - Biological responses to multiple environmental and climatic changes: Environment and Stress, Ph.d. symposium at KVL October 2006
Research output: Contribution to conference › Conference abstract for conference › Research
Published