0000000000390386

AUTHOR

Arve Elvebakk

showing 2 related works from this author

Changes in Onset of Vegetation Growth on Svalbard, 2000–2020

2022

The global temperature is increasing, and this is affecting the vegetation phenology in many parts of the world. The most prominent changes occur at northern latitudes such as our study area, which is Svalbard, located between 76°30′N and 80°50′N. A cloud-free time series of MODIS-NDVI data was processed. The dataset was interpolated to daily data during the 2000–2020 period with a 231.65 m pixel resolution. The onset of vegetation growth was mapped with a NDVI threshold method which corresponds well with a recent Sentinel-2 NDVI-based mapping of the onset of vegetation growth, which was in turn validated by a network of in-situ phenological data from time lapse cameras. The results show th…

Spatial scalesTime seriesNDVIVDP::Zoologiske og botaniske fag: 480Onset of vegetation growthMODIS; NDVI; time series; onset of vegetation growth; trend; Arctic; Svalbard; spatial scalesSvalbardArcticMODISVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480TrendVDP::Mathematics and natural scienses: 400::Zoology and botany: 480General Earth and Planetary SciencesVDP::Zoology and botany: 480Remote Sensing
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Distribution de la température et de la végétation en Baie du Rois, Svalbard (79°), mise en place d'une approche spatiale formalisée

2006

International audience; Le changement climatique est un problème majeur, surtout en Arctique. Ce constat global doit être précisé afin d'appréhender les conséquences du phénomène car son impact se module dans l'espace selon les caractéristiques propres à chaque milieu. L'aire d'étude est située au Svalbard où des données, de différentes sources, sont collectées sur le terrain. Elles sont ensuite traitées au sein d'un système d'information géographique afin de modéliser les variations spatiales à grande échelle de la température et de la végétation.

Svalbard[SHS.GEO] Humanities and Social Sciences/GeographySystème d'information géographiqueClimatologie[SHS.GEO]Humanities and Social Sciences/Geography[ SHS.GEO ] Humanities and Social Sciences/Geography
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