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dc.contributor.authorHøgda, Kjell Arild
dc.contributor.authorTømmervik, Hans
dc.contributor.authorKarlsen, Stein Rune
dc.date.accessioned2017-11-28T12:33:27Z
dc.date.available2017-11-28T12:33:27Z
dc.date.created2013-09-13T10:52:12Z
dc.date.issued2013
dc.identifier.citationRemote Sensing. 2013, 5 (9), 4304-4318.nb_NO
dc.identifier.issn2072-4292
dc.identifier.urihttp://hdl.handle.net/11250/2468255
dc.description.abstractGlobal 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 trendsnb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectphenologynb_NO
dc.subjectstart of the growing seasonnb_NO
dc.subjectNDVI time seriesnb_NO
dc.subjectNDVI3gnb_NO
dc.subjectFennoscandianb_NO
dc.subjectvegetation regionsnb_NO
dc.subjecttemporal trendsnb_NO
dc.titleTrends in the start of the growing season in Fennoscandia 1982–2011nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber4304-4318nb_NO
dc.source.volume5nb_NO
dc.source.journalRemote Sensingnb_NO
dc.source.issue9nb_NO
dc.identifier.doi10.3390/rs5094304
dc.identifier.cristin1049032
dc.relation.projectNorges forskningsråd: 227064nb_NO
cristin.unitcode7511,4,0,0
cristin.unitnameTromsø
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal