Changes in Onset of Vegetation Growth on Svalbard, 2000–2020
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 proc...
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Online Access: | http://hdl.handle.net/10045/130787 https://doi.org/10.3390/rs14246346 |
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ftunivalicante:oai:rua.ua.es:10045/130787 2023-05-15T15:01:48+02:00 Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura Universidad de Alicante. Departamento de Matemática Aplicada 2022-12-15 http://hdl.handle.net/10045/130787 https://doi.org/10.3390/rs14246346 eng eng MDPI https://doi.org/10.3390/rs14246346 info:eu-repo/grantAgreement/EC/H2020/869580 info:eu-repo/grantAgreement/EC/H2020/755617 Karlsen SR, Elvebakk A, Tømmervik H, Belda S, Stendardi L. Changes in Onset of Vegetation Growth on Svalbard, 2000–2020. Remote Sensing. 2022; 14(24):6346. https://doi.org/10.3390/rs14246346 2072-4292 http://hdl.handle.net/10045/130787 doi:10.3390/rs14246346 © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). info:eu-repo/semantics/openAccess CC-BY MODIS NDVI Time series Onset of vegetation growth Trend Arctic Svalbard Spatial scales info:eu-repo/semantics/article 2022 ftunivalicante https://doi.org/10.3390/rs14246346 2023-01-11T00:20:33Z 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 that the years 2000 and 2008 were extreme in terms of the late onset of vegetation growth. The year 2020 had the earliest onset of vegetation growth on Svalbard during the 21-year study. Each year since 2013 had an earlier or equally early timing in terms of the onset of the growth season compared with the 2000–2020 average. A linear trend of 0.57 days per year resulted in an earlier onset of growth of 12 days on average for the entire archipelago of Svalbard in 2020 compared to 2000. This work (S.R.K.) was supported by the Research Council of Norway under the project Svalbard Integrated Arctic Earth Observing System—Infrastructure Development of the Norwegian Node (SIOS-InfraNor Project No. 269927). This SIOS project (InfraNord instrument #51) is funded by the Norwegian Space Agency (NoSA). The research was also partially funded (S.R.K., H.T.) by the Horizon 2020 project ArcticHubs, grant agreement no 869580. This work (S.B.) was also partially supported by Generalitat Valenciana (SEJIGENT/2021/001), the European Union–Next Generation EU (ZAMBRANO 21-04), and European Research Council (ERC) under the ERC-2017-STG SENTIFLEX project (grant agreement 755617). Article in Journal/Newspaper Arctic Svalbard RUA - Repositorio Institucional de la Universidad de Alicante Arctic Norway Nosa ENVELOPE(6.148,6.148,62.615,62.615) Svalbard Remote Sensing 14 24 6346 |
institution |
Open Polar |
collection |
RUA - Repositorio Institucional de la Universidad de Alicante |
op_collection_id |
ftunivalicante |
language |
English |
topic |
MODIS NDVI Time series Onset of vegetation growth Trend Arctic Svalbard Spatial scales |
spellingShingle |
MODIS NDVI Time series Onset of vegetation growth Trend Arctic Svalbard Spatial scales Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
topic_facet |
MODIS NDVI Time series Onset of vegetation growth Trend Arctic Svalbard Spatial scales |
description |
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 that the years 2000 and 2008 were extreme in terms of the late onset of vegetation growth. The year 2020 had the earliest onset of vegetation growth on Svalbard during the 21-year study. Each year since 2013 had an earlier or equally early timing in terms of the onset of the growth season compared with the 2000–2020 average. A linear trend of 0.57 days per year resulted in an earlier onset of growth of 12 days on average for the entire archipelago of Svalbard in 2020 compared to 2000. This work (S.R.K.) was supported by the Research Council of Norway under the project Svalbard Integrated Arctic Earth Observing System—Infrastructure Development of the Norwegian Node (SIOS-InfraNor Project No. 269927). This SIOS project (InfraNord instrument #51) is funded by the Norwegian Space Agency (NoSA). The research was also partially funded (S.R.K., H.T.) by the Horizon 2020 project ArcticHubs, grant agreement no 869580. This work (S.B.) was also partially supported by Generalitat Valenciana (SEJIGENT/2021/001), the European Union–Next Generation EU (ZAMBRANO 21-04), and European Research Council (ERC) under the ERC-2017-STG SENTIFLEX project (grant agreement 755617). |
author2 |
Universidad de Alicante. Departamento de Matemática Aplicada |
format |
Article in Journal/Newspaper |
author |
Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura |
author_facet |
Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura |
author_sort |
Karlsen, Stein Rune |
title |
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
title_short |
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
title_full |
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
title_fullStr |
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
title_full_unstemmed |
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
title_sort |
changes in onset of vegetation growth on svalbard, 2000–2020 |
publisher |
MDPI |
publishDate |
2022 |
url |
http://hdl.handle.net/10045/130787 https://doi.org/10.3390/rs14246346 |
long_lat |
ENVELOPE(6.148,6.148,62.615,62.615) |
geographic |
Arctic Norway Nosa Svalbard |
geographic_facet |
Arctic Norway Nosa Svalbard |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_relation |
https://doi.org/10.3390/rs14246346 info:eu-repo/grantAgreement/EC/H2020/869580 info:eu-repo/grantAgreement/EC/H2020/755617 Karlsen SR, Elvebakk A, Tømmervik H, Belda S, Stendardi L. Changes in Onset of Vegetation Growth on Svalbard, 2000–2020. Remote Sensing. 2022; 14(24):6346. https://doi.org/10.3390/rs14246346 2072-4292 http://hdl.handle.net/10045/130787 doi:10.3390/rs14246346 |
op_rights |
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/rs14246346 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
24 |
container_start_page |
6346 |
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1766333810333450240 |