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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ftpubmed:oai:pubmedcentral.nih.gov:7614054 2023-05-15T18:29:35+02:00 Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura 2022-12-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614054/ https://doi.org/10.3390/rs14246346 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614054/ http://dx.doi.org/10.3390/rs14246346 https://creativecommons.org/licenses/by/4.0/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/). CC-BY Remote Sens (Basel) Article Text 2022 ftpubmed https://doi.org/10.3390/rs14246346 2023-01-15T01:29:26Z 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. Text Svalbard PubMed Central (PMC) Svalbard Remote Sensing 14 24 6346 |
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Article Karlsen, Stein Rune Elvebakk, Arve Tømmervik, Hans Belda, Santiago Stendardi, Laura Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 |
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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. |
format |
Text |
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 |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614054/ https://doi.org/10.3390/rs14246346 |
geographic |
Svalbard |
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Svalbard |
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Svalbard |
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Svalbard |
op_source |
Remote Sens (Basel) |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614054/ http://dx.doi.org/10.3390/rs14246346 |
op_rights |
https://creativecommons.org/licenses/by/4.0/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/). |
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CC-BY |
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https://doi.org/10.3390/rs14246346 |
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Remote Sensing |
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14 |
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24 |
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6346 |
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