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dc.contributor.authorKarlsen, Stein Rune
dc.contributor.authorStendardi, Laura
dc.contributor.authorTømmervik, Hans
dc.contributor.authorNilsen, Lennart
dc.contributor.authorArntzen, Ingar
dc.contributor.authorCooper, Elisabeth J.
dc.date.accessioned2021-09-24T07:17:16Z
dc.date.available2021-09-24T07:17:16Z
dc.date.created2021-08-24T08:34:14Z
dc.date.issued2021
dc.identifier.citationRemote Sensing. 2021, 13 (15), 1-14.en_US
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/11250/2781282
dc.description.abstractThe Arctic is a region that is expected to experience a high increase in temperature. Changes in the timing of phenological phases, such as the onset of growth (as observed by remote sensing), is a sensitive bio-indicator of climate change. In this paper, the study area was the central part of Spitsbergen, Svalbard, located between 77.28°N and 78.44°N. The goals of this study were: (1) to prepare, analyze and present a cloud-free time-series of daily Sentinel-2 NDVI datasets for the 2016 to 2019 seasons, and (2) to demonstrate the use of the dataset in mapping the onset of growth. Due to a short and intense period with greening-up and frequent cloud cover, all the cloud-free Sentinel-2 data were used. The onset of growth was then mapped by a NDVI threshold method, which showed significant correlation (r2 = 0.47, n = 38, p < 0.0001) with ground-based phenocam observation of the onset of growth in seven vegetation types. However, large bias was found between the Sentinel-2 NDVI-based mapped onset of growth and the phenocam-based onset of growth in a moss tundra, which indicates that the data in these vegetation types must be interpreted with care. In 2018, the onset of growth was about 10 days earlier compared to 2017.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleTime-series of cloud-free sentinel-2 ndvi data used in mapping the onset of growth of central spitsbergen, svalbarden_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2021, Authors
dc.description.versionpublishedVersionen_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.3390/rs13153031
dc.identifier.cristin1928193
dc.source.journalRemote Sensingen_US
dc.source.volume13en_US
dc.source.issue15en_US
dc.source.pagenumber1-14en_US
dc.relation.projectNorges forskningsråd: 269927en_US
dc.relation.projectEU/869471en_US
dc.relation.projectNorsk romsenter: NoSaen_US


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