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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ftninstnf:oai:brage.nina.no:11250/2468255 2023-05-15T16:11:33+02:00 Trends in the start of the growing season in Fennoscandia 1982–2011 Høgda, Kjell Arild Tømmervik, Hans Karlsen, Stein Rune 2013 application/pdf http://hdl.handle.net/11250/2468255 https://doi.org/10.3390/rs5094304 eng eng Norges forskningsråd: 227064 Remote Sensing. 2013, 5 (9), 4304-4318. urn:issn:2072-4292 http://hdl.handle.net/11250/2468255 https://doi.org/10.3390/rs5094304 cristin:1049032 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 4304-4318 5 Remote Sensing 9 phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Journal article Peer reviewed 2013 ftninstnf https://doi.org/10.3390/rs5094304 2021-12-23T07:17:18Z 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. phenology; start of the growing season; NDVI time series; NDVI3g; Fennoscandia; vegetation regions; temporal trends publishedVersion Article in Journal/Newspaper Fennoscandia Norwegian Institute for Nature Research: Brage NINA Remote Sensing 5 9 4304 4318 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends |
spellingShingle |
phenology start of the growing season NDVI time series NDVI3g Fennoscandia vegetation regions temporal trends Høgda, Kjell Arild Tømmervik, Hans Karlsen, Stein Rune 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 |
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. phenology; start of the growing season; NDVI time series; NDVI3g; Fennoscandia; vegetation regions; temporal trends publishedVersion |
format |
Article in Journal/Newspaper |
author |
Høgda, Kjell Arild Tømmervik, Hans Karlsen, Stein Rune |
author_facet |
Høgda, Kjell Arild Tømmervik, Hans Karlsen, Stein Rune |
author_sort |
Høgda, Kjell Arild |
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 |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/2468255 https://doi.org/10.3390/rs5094304 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
4304-4318 5 Remote Sensing 9 |
op_relation |
Norges forskningsråd: 227064 Remote Sensing. 2013, 5 (9), 4304-4318. urn:issn:2072-4292 http://hdl.handle.net/11250/2468255 https://doi.org/10.3390/rs5094304 cristin:1049032 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/rs5094304 |
container_title |
Remote Sensing |
container_volume |
5 |
container_issue |
9 |
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4304 |
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4318 |
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