Tropical Cyclone Impact and Forest Resilience in the Southwestern Pacific
Autor: | Baptiste Delaporte, Thomas Ibanez, Marc Despinoy, Morgan Mangeas, Christophe Menkes |
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Přispěvatelé: | Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE [Nouvelle-Calédonie]), Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie])-Ifremer - Nouvelle-Calédonie, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM), Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie]), UMR 228 Espace-Dev, Espace pour le développement, Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Guyane (UG)-Université des Antilles (UA)-Université de Montpellier (UM), That work was funded by the French Pacific Funds and T.I. was partly supported by Hermon Slade fundation (HSF 19105). |
Rok vydání: | 2022 |
Předmět: |
forests
Saffir–Simpson hurricane wind scale maximum sustained wind speed fForests fungi normalized difference vegetation index Maximum sustained wind speed South Pacific Islands damages Saffir-Simpson hurricane wind scale Normalized difference vegetation index [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture forestry Tropical cyclones Damages [SDE]Environmental Sciences General Earth and Planetary Sciences tropical cyclones [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology recovery time Recovery time |
Zdroj: | Remote Sensing Remote Sensing, 2022, 14 (5), ⟨10.3390/rs14051245⟩ Remote Sensing (2072-4292) (MDPI AG), 2022-03, Vol. 14, N. 5, P. 1245 (12p.) |
ISSN: | 2072-4292 |
DOI: | 10.3390/rs14051245 |
Popis: | International audience; Tropical cyclones (TCs) can have profound effects on the dynamics of forest vegetation that need to be better understood. Here, we analysed changes in forest vegetation induced by TCs using the normalized difference vegetation index (NDVI). We used an accurate historical database of TC tracks and intensities, together with the Willoughby cyclone model to reconstruct the 2D surface wind speed structure of TCs and analyse how TCs affect forest vegetation. We used segmented linear models to identify significant breakpoints in the relationship between the reconstructed maximum sustained wind speed (Wmax) and the observed changes in NDVI. We tested the hypothesis that the rate of change in damage caused by TCs to forest and recovery time would increase according to Wmax thresholds as defined in the widely used Saffir–Simpson hurricane wind scale (SSHWS). We showed that the most significant breakpoint was located at 50 m/s. This breakpoint corresponds to the transition between categories 2 and 3 TCs in the SSHWS. Below this breakpoint, damages caused to forest vegetation and the time needed to recover from these damages were negligable. We found a second breakpoint, with a sharp increase in damages for winds >75 m/s. This suggested that extremely intense tropical cyclones, which might be more frequent in the future, can cause extreme damages to forest vegetation. Nevertheless, we found high variation in the observed damages and time needed to recover for a given Wmax. Further studies are needed to integrate other factors that might affect the exposure and resistance to TCs as well as forests’ capacity to recover from these disturbances. |
Databáze: | OpenAIRE |
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