Trends in the Start of the Growing Season in Fennoscandia 1982–2011
Global temperature is increasing, and this is affecting the vegetation phenology in many parts of the world. In Fennoscandia, as well as Northern Europe, the advances of phenological events in spring have been recorded in recent decades. In this study, we analyzed the start of the growing season wit...
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ftdoajarticles:oai:doaj.org/article:93396e41b1e4415b89f70b680f6ce5dd 2023-05-15T16:11:36+02:00 Trends in the Start of the Growing Season in Fennoscandia 1982–2011 Stein Rune Karlsen Hans Tømmervik Kjell Arild Høgda 2013-09-01T00:00:00Z https://doi.org/10.3390/rs5094304 https://doaj.org/article/93396e41b1e4415b89f70b680f6ce5dd EN eng MDPI AG http://www.mdpi.com/2072-4292/5/9/4304 https://doaj.org/toc/2072-4292 doi:10.3390/rs5094304 2072-4292 https://doaj.org/article/93396e41b1e4415b89f70b680f6ce5dd Remote Sensing, Vol 5, Iss 9, Pp 4304-4318 (2013) phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Science Q article 2013 ftdoajarticles https://doi.org/10.3390/rs5094304 2022-12-31T16:10:45Z Global temperature is increasing, and this is affecting the vegetation phenology in many parts of the world. In Fennoscandia, as well as Northern Europe, the advances of phenological events in spring have been recorded in recent decades. In this study, we analyzed the start of the growing season within five different vegetation regions in Fennoscandia using the 30-year Global Inventory Modeling and Mapping Studies (GIMMS) NDVI3g dataset. We applied a previously developed pixel-specific Normalized Difference Vegetation Index (NDVI) threshold method, adjusted it to the NDVI3g data and analyzed trends within the different regions. Results show a warming trend with an earlier start of the growing season of 11.8 ± 2.0 days (p < 0.01) for the whole area. However, there are large regional differences, and the warming/trend towards an earlier start of the growing season is most significant in the southern regions (19.3 ± 4.7 days, p < 0.01 in the southern oceanic region), while the start was stable or modest earlier (two to four days; not significant) in the northern regions. To look for temporal variations in the trends, we divided the 30-year period into three separate decadal time periods. Results show significantly more change/trend towards an earlier start of the growing season in the first period compared to the two last. In the second and third period, the trend towards an earlier start of the growing season slowed down, and in two of the regions, the trend towards an earlier start of the growing season was even reversed during the last decade. Article in Journal/Newspaper Fennoscandia Directory of Open Access Journals: DOAJ Articles Remote Sensing 5 9 4304 4318 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Science Q |
spellingShingle |
phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Science Q Stein Rune Karlsen Hans Tømmervik Kjell Arild Høgda Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
topic_facet |
phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Science Q |
description |
Global temperature is increasing, and this is affecting the vegetation phenology in many parts of the world. In Fennoscandia, as well as Northern Europe, the advances of phenological events in spring have been recorded in recent decades. In this study, we analyzed the start of the growing season within five different vegetation regions in Fennoscandia using the 30-year Global Inventory Modeling and Mapping Studies (GIMMS) NDVI3g dataset. We applied a previously developed pixel-specific Normalized Difference Vegetation Index (NDVI) threshold method, adjusted it to the NDVI3g data and analyzed trends within the different regions. Results show a warming trend with an earlier start of the growing season of 11.8 ± 2.0 days (p < 0.01) for the whole area. However, there are large regional differences, and the warming/trend towards an earlier start of the growing season is most significant in the southern regions (19.3 ± 4.7 days, p < 0.01 in the southern oceanic region), while the start was stable or modest earlier (two to four days; not significant) in the northern regions. To look for temporal variations in the trends, we divided the 30-year period into three separate decadal time periods. Results show significantly more change/trend towards an earlier start of the growing season in the first period compared to the two last. In the second and third period, the trend towards an earlier start of the growing season slowed down, and in two of the regions, the trend towards an earlier start of the growing season was even reversed during the last decade. |
format |
Article in Journal/Newspaper |
author |
Stein Rune Karlsen Hans Tømmervik Kjell Arild Høgda |
author_facet |
Stein Rune Karlsen Hans Tømmervik Kjell Arild Høgda |
author_sort |
Stein Rune Karlsen |
title |
Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
title_short |
Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
title_full |
Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
title_fullStr |
Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
title_full_unstemmed |
Trends in the Start of the Growing Season in Fennoscandia 1982–2011 |
title_sort |
trends in the start of the growing season in fennoscandia 1982–2011 |
publisher |
MDPI AG |
publishDate |
2013 |
url |
https://doi.org/10.3390/rs5094304 https://doaj.org/article/93396e41b1e4415b89f70b680f6ce5dd |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Remote Sensing, Vol 5, Iss 9, Pp 4304-4318 (2013) |
op_relation |
http://www.mdpi.com/2072-4292/5/9/4304 https://doaj.org/toc/2072-4292 doi:10.3390/rs5094304 2072-4292 https://doaj.org/article/93396e41b1e4415b89f70b680f6ce5dd |
op_doi |
https://doi.org/10.3390/rs5094304 |
container_title |
Remote Sensing |
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5 |
container_issue |
9 |
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4304 |
op_container_end_page |
4318 |
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