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Your search keyword '"Karlsson, P.E."' showing total 31 results
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31 results on '"Karlsson, P.E."'

6. Nitrogen deposition is the most important environmental driver of growth of pure, even-aged and managed European forests

Author

Etzold, S., Ferretti, M., Reinds, G.J., Solberg, S., Gessler, A., Waldner, P., Schaub, M., Simpson, D., Benham, S., Hansen, Karin, Ingerslev, M., Jonard, M., Karlsson, P.E., Lindroos, A.-J., Marchetto, A., Manninger, M., Meesenburg, H., Merilä, P., Nöjd, P., Rautio, P., Sanders, T.G.M., Seidling, W., Skudnik, M., Thimonier, A., Verstraeten, A., Vesterdal, L., Vejpustkova, M., de Vries, W., Etzold, S., Ferretti, M., Reinds, G.J., Solberg, S., Gessler, A., Waldner, P., Schaub, M., Simpson, D., Benham, S., Hansen, Karin, Ingerslev, M., Jonard, M., Karlsson, P.E., Lindroos, A.-J., Marchetto, A., Manninger, M., Meesenburg, H., Merilä, P., Nöjd, P., Rautio, P., Sanders, T.G.M., Seidling, W., Skudnik, M., Thimonier, A., Verstraeten, A., Vesterdal, L., Vejpustkova, M., and de Vries, W.

Published
2020

7. New flux based dose-response relationships for ozone for European forest tree species

Author

Buker, P., Feng, Z., Uddling, J., Briolat, A., Alonso, R., Braun, S., Elvira, S., Gerosa, G., Karlsson, P.E., Le Thiec, D., Marzouli, R., Mills, G., Oksanen, E., Wieser, G., Wlikinson, M., Emberson, L.D., Buker, P., Feng, Z., Uddling, J., Briolat, A., Alonso, R., Braun, S., Elvira, S., Gerosa, G., Karlsson, P.E., Le Thiec, D., Marzouli, R., Mills, G., Oksanen, E., Wieser, G., Wlikinson, M., and Emberson, L.D.

Abstract

To derive O3 dose–response relationships (DRR) for five European forest trees species and broadleaf deciduous and needleleaf tree plant functional types (PFTs), phytotoxic O3 doses (PODy) were related to biomass reductions. PODy was calculated using a stomatal flux model with a range of cut-off thresholds (y) indicative of varying detoxification capacities. Linear regression analysis showed that DRR for PFT and individual tree species differed in their robustness. A simplified parameterisation of the flux model was tested and showed that for most non-Mediterranean tree species, this simplified model led to similarly robust DRR as compared to a species- and climate region-specific parameterisation. Experimentally induced soil water stress was not found to substantially reduce PODy, mainly due to the short duration of soil water stress periods. This study validates the stomatal O3 flux concept and represents a step forward in predicting O3 damage to forests in a spatially and temporally varying climate.

Published
2015

8. New flux based dose–response relationships for ozone for European forest tree species

Author

Büker, P., primary, Feng, Z., additional, Uddling, J., additional, Briolat, A., additional, Alonso, R., additional, Braun, S., additional, Elvira, S., additional, Gerosa, G., additional, Karlsson, P.E., additional, Le Thiec, D., additional, Marzuoli, R., additional, Mills, G., additional, Oksanen, E., additional, Wieser, G., additional, Wilkinson, M., additional, and Emberson, L.D., additional

Published
2015
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30. Ozone concentration gradients and wind conditions in Norway spruce (Picea abies) forests in Sweden

Author

Karlsson, P.E., Hansson, M., Höglund, H.-O., and Pleijel, H.

Subjects
*CHEMICAL reagents, *AIR pollution, *FOREST canopies
Abstract

Abstract: Ozone concentrations and wind conditions were measured at different heights above ground inside two different Norway spruce forest canopies in Sweden and compared to those outside or above the forests. Compared to high above ground outside or above the canopies, the ozone concentrations inside the Norway spruce forests were reduced 3–8% during mid-day and 10–40% during nighttime. Daylight Accumulated exposure Over a Threshold 40ppb (AOT40) was reduced 15–45% inside as compared to outside the forest. The horizontal concentration differences between inside and outside the forest were in the order of 3–4%, independently of the height above ground. The ozone concentration difference inside and outside the forest depended on the air turbulence as well as the horizontal wind speed inside the forest. It also depended on the distance to the forest edge in relation to the wind direction. The ozone concentration differences inside and outside the Norway spruce forests were explained by the differences in the rate of dry deposition in relation to the rate of replacement of ozone from higher air layers or by the horizontal wind going into the forest. [Copyright &y& Elsevier]

Published
2006
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