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Your search keyword '"Böhm, Margi"' showing total 22 results
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22 results on '"Böhm, Margi"'

6. Fragmented landscape: Impact on atmospheric flow and tree stability

Author

Poette, Christopher, Gardiner, Barry, Dupont, Sylvain, Brunet, Yves, Böhm, Margi, Harman, Ian, Finnigan, John, Hughes, Dale, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Australian Meteorological and Oceanographic Society, Partenaires INRAE, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), and ProdInra, Migration

Subjects
[SDE.MCG] Environmental Sciences/Global Changes, [SDE.MCG]Environmental Sciences/Global Changes
Abstract

International audience; The wind is responsible of more than half of the damage affecting European forests, e.g., in 2009, Klaus storm directly destroyed 43.1 Mm3 of timber in the Landes Forest in South-west France equivalent to 14% of the standing volume. At present only local stand level factors are taken into account in calculating forest wind risk (Gardiner et al., 2008). However, it is known that the wind is strongly affected by the surfaces over which it has previously flowed. Forest edges in particular play an important role in determining the characteristics of the atmospheric flow by generating turbulence and coherent tree scale structures and represent region of high damage risk (Brunet et al. 2009). In a fragmented landscape, consisting of surfaces of different heights and roughness, the multiplicity of edges may have cumulative effects at the regional scale leading to increased forest damage during storms. Our main hypothesis is that the level of forest fragmentation affects the characteristics of the atmospheric flow (wind speed, turbulent kinetic energy, etc…), which then have an impact on the level of mechanical stress on trees in the forest. To test this we conducted experiments using a well characterized wind tunnel model with different levels of fragmentation that mimic interfaces from a “short grass” surface to a “tall forest” canopy (Raupach et al., 1986). Measurements were made using 3D Laser Doppler Velocimetry at high spatial resolution. This set of experiments has been used to calibrate a Large-Eddy Simulation (LES) airflow model accounting for the canopy drag (Dupont and Brunet, 2008). The LES is then used to predict the potential impact and risk levels of fragmentation on forest damage in order to try to understand observations of recent storms damage to the forests of South-west France.

Published
2014

9. Physiography and Forest Types

Author

Olson, R. K., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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10. Summary, Projections, and Recommendations

Author

Olson, R. K., Peterson, D. L., Böhm, M., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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11. Old-Growth Douglas-Fir in Western Washington

Author

Brubaker, L. B., Vega-Gonzalez, S., Ford, E. D., Ribic, C. A., Earle, C. J., Segura, G., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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13. Mixed Conifer Forests of the Sierra Nevada

Author

Peterson, D. L., Arbaugh, M. J., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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14. Coniferous Forests of Arizona and New Mexico

Author

Graybill, D. A., Rose, M. R., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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15. Coniferous Forests of the Colorado Front Range

Author

Graybill, D. A., Peterson, D. L., Arbaugh, M. J., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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20. Air Quality and Deposition

Author

Böhm, M., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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21. Climate

Author

Rose, M. R., Böhm, M., Olson, R. K., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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22. Introduction

Author

Olson, R. K., Billings, W. D., editor, Golley, F., editor, Lange, O. L., editor, Olson, J. S., editor, Remmert, H., editor, Olson, Richard K., editor, Binkley, Dan, editor, and Böhm, Margi, editor

Published
1992
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