Time-series of cloud-free sentinel-2 ndvi data used in mapping the onset of growth of central spitsbergen, svalbard
dc.contributor.author | Karlsen, Stein Rune | |
dc.contributor.author | Stendardi, Laura | |
dc.contributor.author | Tømmervik, Hans | |
dc.contributor.author | Nilsen, Lennart | |
dc.contributor.author | Arntzen, Ingar | |
dc.contributor.author | Cooper, Elisabeth J. | |
dc.date.accessioned | 2021-09-24T07:17:16Z | |
dc.date.available | 2021-09-24T07:17:16Z | |
dc.date.created | 2021-08-24T08:34:14Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Remote Sensing. 2021, 13 (15), 1-14. | en_US |
dc.identifier.issn | 2072-4292 | |
dc.identifier.uri | https://hdl.handle.net/11250/2781282 | |
dc.description.abstract | The 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.iso | eng | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Time-series of cloud-free sentinel-2 ndvi data used in mapping the onset of growth of central spitsbergen, svalbard | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.rights.holder | © 2021, Authors | |
dc.description.version | publishedVersion | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.3390/rs13153031 | |
dc.identifier.cristin | 1928193 | |
dc.source.journal | Remote Sensing | en_US |
dc.source.volume | 13 | en_US |
dc.source.issue | 15 | en_US |
dc.source.pagenumber | 1-14 | en_US |
dc.relation.project | Norges forskningsråd: 269927 | en_US |
dc.relation.project | EU/869471 | en_US |
dc.relation.project | Norsk romsenter: NoSa | en_US |