Helge Ro-Poulsen

Helge Ro-Poulsen

Emeritus

Member of:

    ORCID: 0000-0002-6531-118X

    Publication year:
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    1 - 50 out of 82Page size: 50
    1. 1989
    2. Published

      A delayed effect of ozone fumigation on photosynthesis of Norway spruce

      Eamus, D., Barnes, J. D., Mortensen, L., Ro-Poulsen, Helge & Davison, A. W., 1989, In: Annals of Forest Science. 46 (suppl.), p. 568-572

      Research output: Contribution to journal › Journal article › Research

    3. 1991
    4. Published

      Miljø og restprodukter. Gasformige luftforureningers effekter på danske plantesamfund

      Johnson, I., Ro-Poulsen, Helge, Søchting, Ulrik & Mortensen, L., 1991, Danmark: Energiministeriets Forskningsudvalg.

      Research output: Book/Report › Book › Research

    5. 1993
    6. Published

      Modelling the effect of fluxes of pollution to forest by coordinated measurements of permanent plot ecosystems, 92.60DK.DK003.0 and 93.60.DK003.0 (Fællesrapport til CEC fra FLS, DMU, Risø og KU)

      Ro-Poulsen, Helge, 1993, København.

      Research output: Book/Report › Book › Research

    7. Published

      Physiology of the Norway spruce trees growing on the danish EXMAN site

      Mikkelsen, T. N. & Ro-Poulsen, Helge, 1993, Experimental Manipulations of biota and biogeochemical cycling in Ecosystems. Ecosystems Research Report 4. Brussels, p. 244-246

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

    8. 1994

    9. Atmosfærens stoftilførsel til danske skovøkosystemer

      Hovmand, Mads Frederik, Andersen, H. V., Bille-Hansen, J. & Ro-Poulsen, Helge, 1994, In: Danmarks Miljoeundersoegelser. Faglig Rapport. 98, p. 59

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

    10. Published

      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

    11. Published

      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. 153-163

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

    12. 1995
    13. Published

      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. 1413-1418

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

    14. 1996
    15. Published

      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. 80-85

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

    16. Published

      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. 1349-1354

      Research output: Contribution to journal › Journal article › Research

    17. Published

      Ozone effects on primary productivity in current year shoots of 35 years old Norway spruce

      Mikkelsen, T. N. & Ro-Poulsen, Helge, 1996, Critical levels for Ozone-Experiments with crops, wild plants and forest tree species in the Nordic countries. København: Nordic Council of Ministers, p. 73-79

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

    18. 1997
    19. Published

      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. 331-336

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

    20. Published

      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. 281-290

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

    21. 1998
    22. Published

      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. 109-122

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

    23. Published

      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

    24. 2000
    25. Published

      Ozone uptake by an evergreen forest canopy: temporal variation and possible mechanisms

      Mikkelsen, T. N., Ro-Poulsen, Helge, Pilegaard, K., Hovmand, Mads Frederik, Jensen, N. O., Christensen, C. S. & Hummelshoej, P., 2000, In: Environmental Pollution. 109, 3, p. 423-429 6 p.

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

    26. 2001
    27. Published

      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

    28. 2002
    29. Published

      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. 97-104

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

    30. Published

      EuroBionet: A Pan-European biomonotoring network for urban air quality assessment

      Klumpp, A., Ansel, W., Klumpp, G., Belluzzo, N., Calatayud, V., Chaplin, N., Garrec, J. P., Gutsche, H-J., Hayes, M., Hentze, H-W., Kambezidis, H., Laurent, O., Penuelas, J., Rasmussen, S., Ribas, A., Ro-Poulsen, H., Rossi, S., Sanz, M. J., Shang, H., Sifakis, N. & 1 others, Vergne, P., 2002, In: Environmental Science and Pollution Research. 9, p. 199-203

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

    31. 2003
    32. Published

      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., 2003

      Research output: Book/Report › Report › Communication

    33. Published

      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. 315-333

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

    34. Published

      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

    35. 2004
    36. Published

      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., 2004

      Research output: Book/Report › Report › Communication

    37. Published

      Five-year measurements of ozone fluxes to a Danish Norway spruce canopy

      Mikkelsen, T. N., Ro-Poulsen, Helge, Hovmand, Mads Frederik, Jensen, N. O., Pilegaard, K. & Egeløv, A. H., 2004, In: Atmospheric Environment. 38, 15, p. 2361-2371 11 p.

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

    38. Published

      Growing-season carbon dioxide flux in a dry subarctic heath: Responses to long-term manipulations

      Illeris, L., Kønig, S. M., Grogan, P., Jonasson, S. E., Michelsen, Anders & Ro-Poulsen, Helge, 2004, In: Arctic, Antarctic, and Alpine Research. 36, p. 456-463

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

    39. Published

      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

    40. Published

      Reduction of the Ambient UV-B Radiation in the High Arctic Increases Fv/Fm in Salix arctica and Vaccinium uliginosum and Reduces Stomatal Conductance and Internal CO2 Concentration in Salix arctica

      Bredahl, L., Ro-Poulsen, Helge & Mikkelsen, T. N., 2004, In: Arctic, Antarctic, and Alpine Research. 36, p. 363-368

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

    41. 2005
    42. Published

      Ambient UV-radiation decreases photosynthetic performance on High Arctic plants

      Albert, K., Ro-Poulsen, Helge & N. Mikkelsen, T., 2005.

      Research output: Contribution to conference › Conference abstract for conference › Research

    43. Published

      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 - 574

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

    44. Published

      Effects of Reducing the Ambient UV-B Radiation in the High Arctic on Salix arctica and Vaccinium uliginosum.

      Albert, K., Ro-Poulsen, Helge, Mikkelsen, T. N., Bredahl, L. & Haakansson, K. B., 2005, In: Phyton. 45, 4, p. 41-49

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

    45. Published

      Effects of ambient versus reduced UV-B radiation on high arctic Salix arctica assessed by measurements and calculations of chlorophyll a fluorescence parameters from fluorescence transients

      Albert, K., Mikkelsen, T. N. & Ro-Poulsen, Helge, 2005, In: Physiologia Plantarum : An International Journal for Plant Biology. 124, 2, p. 208-226

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

    46. Published

      Monitoring effects of UV-B radiation on high arctic vegetation

      Albert, K. R., Ro-Poulsen, Helge, Mikkelsen, T. N., Håkansson, K. B., Bredahl, L. & Rinnan, R., 2005, Zackenberg Ecological Research Operations, 10th Annual Report, 2004. Copenhagen K: Danish Polar Center, p. 68-70

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

    47. 2006
    48. Published

      Effects of climate manipulations on processes and organisms in high arctic terrestrial ecosystems

      Michelsen, Anders, Kønig, S. M., Illeris, L., Arndal, M., Albert, K., Tamstorf, M. P. & Ro-Poulsen, Helge, 2006, Zackenberg Ecological Research Operations11th Annual Report, 2005: Copenhagen, Danish Polar Center, Ministry of Science, Technology andInnovation, 2006.. Klitgaard, A. B., Rasch, M. & Caning, K. (eds.). Copenhagen: Danish Polar Center, p. 89-90

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

    49. Published

      How does prolonged drought affect plant physiological processes? - Focus on the interactions with increased temperature and elevated [CO2] within the CLIMAITE project?

      Albert, K., Ro-Poulsen, Helge & N. Mikkelsen, T., 2006.

      Research output: Contribution to conference › Conference abstract for conference › Research

    50. Published

      Ozone pollution and ozone biomonitoring in European cities Part II. Ozone-induced plant injury and its relationship with descriptors of ozone pollution

      Klumpp, A., Ansel, W., Klumpp, G., Vergne, P., Sifakis, N., Sanz, M. J., Rasmussen, S., Ro-Poulsen, Helge, Ribas, A., Penuelas, J., Kambezidis, H., He, S., Garrec, J. P. & Calatayud, V., 2006, In: Atmospheric Environment. 40, 38, p. 7437-7448

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

    51. Published

      Ozone pollution and ozone biomonitoring in European cities. Part I: Ozone concentrations and cumulative exposure indices at urban and suburban sites

      Klumpp, A., Ansel, W., Klumpp, G., Calatayud, V., Garrec, J. P., He, S., Penuelas, J., Ribas, A., Ro-Poulsen, Helge, Rasmussen, S., Sanz, M. J. & Vergne, P., 2006, In: Atmospheric Environment. 40, 40, p. 7963-7974

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

    52. Published

      Studying effects of current UV-fluxes on high arctic vegetation (UV-B exclusion experiments)

      Albert, K., Arndal, M. F., Michelsen, Anders, Tamstorf, M., Ro-Poulsen, Helge & N. Mikkelsen, T., 2006, Zackenberg Ecological Research Operations 11th Annual Report, 2005: Copenhagen, Danish Polar Center, Ministry of Science, Technology andInnovation, 2006. Klitgaard, A. B., Rasch, M. & Caning, K. (eds.). Danish Polar Center, p. 90-91

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

    53. Published

      The Biological Time Machine - Biological responses to multiple environmental and climatic changes: Environment and Stress, Ph.d. symposium at KVL October 2006

      Albert, K., Ro-Poulsen, Helge, N. Mikkelsen, T., Michelsen, Anders, Beier, C., Jonasson, S. E., Ambus, Per Lennart, Schmidt, Inger Kappel, Holmstrup, M., Priemé, Anders & Christensen, Søren, 2006.

      Research output: Contribution to conference › Conference abstract for conference › Research

    54. Published

      Tradescantia micronucleus test indicates genotoxic potential of traffic emissions in European cities.

      Klumpp, A., Ansel, W., Klumpp, G., Calatayud, V., Garrec, J. P., He, S., Penuelas, J., Ribas, A., Ro-Poulsen, Helge, Rasmussen, S., Sanz, M. J. & Vergne, P., 2006, In: Environmental Pollution. 139, 3, p. 515-522

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

    55. 2007
    56. Published

      CLIMAITE – a three factor climate change ecosystem manipulation experiment

      N. Mikkelsen, T., Beier, C., Albert, K. & Ro-Poulsen, Helge, 2007, In: Geophysical Research Abstracts. 10

      Research output: Contribution to journal › Conference abstract in journal › Research

    57. Published

      Effects of manipulations of local climate on processes and organisms in high arctic terrestrial ecosystems

      Michelsen, Anders, Ellebjerg, S., Tamstorf, M., Schmidt, N. M., Illeris, L., Albert, K. & Ro-Poulsen, Helge, 2007, Zackenberg Ecological Research Operations. 12th Annual Report 2006. Klitgaard, A. B., Rasch, M. & Canning, K. (eds.). Copenhagen, DK: Nyt Nordisk Forlag Arnold Busck, p. 80-81 2 p.

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

    58. Published

      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

    59. 2008
    60. Published

      Ambient UV-B decreases PSII performance and net photosynthesis under natural irradiance of the high arctic dwarf shrub Salix arctica

      Albert, K., Mikkelsen, T. N., Ro-Poulsen, Helge, Arndal, M. F. & Michelsen, Anders, 2008.

      Research output: Contribution to conference › Conference abstract for conference › Research

    61. Published

      Ambient UV-B radiation decreases photosynthesis in high arctic Vaccinium uliginosum.

      Albert, K., Ro-Poulsen, Helge & N. Mikkelsen, T., 2008, In: Physiologia Plantarum : An International Journal for Plant Biology. 133, 2, p. 199-210 11 p.

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

    62. Published

      Biological responses to current UV-B radiation in Arctic regions

      Albert, K. R., Mikkelsen, T. N. & Ro-Poulsen, Helge, 2008, In: Geophysical Research Abstracts. 10, EGU2008-A-11698

      Research output: Contribution to journal › Conference abstract in journal › Research

    63. Published

      Biological responses to current UV-B radiation in Arctic regions: Geophysical Research Abstracts, Vol. 10, EGU2008-A-11698, 2008. SRef-ID: 1607-7962/gra/EGU2008-A-11698. EGU General Assembly 13-18 2008 April Vienna, Switzerland

      Albert, K., N. Mikkelsen, T. & Ro-Poulsen, Helge, 2008.

      Research output: Contribution to conference › Conference abstract for conference › Research

    64. Published

      Biological responses to current UV-B radiation in Arctic regions: 5th SPPS 2008 PhD conference January 24-27 2008 in Haslev, Denmark

      Albert, K., N. Mikkelsen, T. & Ro-Poulsen, Helge, 2008.

      Research output: Contribution to conference › Conference abstract for conference › Research

    65. Published

      Biological responses to current fluxes of ultraviolet radiation in High Arctic

      Albert, K., Rinnan, R., N. mikkelsen, T., Ro-Poulsen, Helge, Michelsen, Anders, Arndal, M. F. & M. Schmidt, N., 2008.

      Research output: Contribution to conference › Conference abstract for conference › Research

    66. Published

      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, Riis-Nielsen, T., Ro-Poulsen, Helge, Andersen, K. S., Selsted, M., Sørensen, P., S. Larsen, K., S. Carter, M., Ibrom, A., Martinussen, Torben, Miglietta, F. & Sverdrup, H., 2008.

      Research output: Contribution to conference › Conference abstract for conference › Research

    67. Published

      Effects of manipulations of local climate on carbon dioxide exchange and plant performance in two high arctic heaths

      Michelsen, Anders, Boesgaard, K., Arndal, M. F., Tamstorf, M., Schmidt, N. M., Albert, K. & Ro-Poulsen, Helge, 2008, Zackenberg Ecological Research Operations, 13th Annual Report, 2007.: Danish Polar Center, Danish Agency for Science, Technology and innovation, Ministry of Science, Technology and Innovation.. Klitgaard, A. B. & Rasch, M. (eds.). Copenhagen: Danish Polar Center, p. 70-71

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

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