Cristin-resultat-ID: 2094315
Sist endret: 16. februar 2023, 15:47
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Changes in Onset of Vegetation Growth on Svalbard, 2000–2020

Bidragsytere:
  • Stein Rune Karlsen
  • Arve Elvebakk
  • Hans Tømmervik
  • Santiago Belda og
  • Laura Stendardi

Tidsskrift

Remote Sensing
ISSN 2072-4292
e-ISSN 2072-4292
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Volum: 14
Hefte: 24
Artikkelnummer: 6346
Open Access

Importkilder

Scopus-ID: 2-s2.0-85144815333

Klassifisering

Vitenskapsdisipliner

Zoologiske og botaniske fag

Beskrivelse Beskrivelse

Tittel

Changes in Onset of Vegetation Growth on Svalbard, 2000–2020

Sammendrag

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◦300N and 80◦500N. 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. MODIS; NDVI; time series; onset of vegetation growth; trend; Arctic; Svalbard; spatial scales

Bidragsytere

Stein Rune Karlsen

  • Tilknyttet:
    Forfatter
    ved NORCE Klima og miljø ved NORCE Norwegian Research Centre AS

Arve Elvebakk

  • Tilknyttet:
    Forfatter
    ved Botanisk hage ved UiT Norges arktiske universitet

Hans Tømmervik

  • Tilknyttet:
    Forfatter
    ved NINA Tromsø ved Norsk institutt for naturforskning

Santiago Belda

  • Tilknyttet:
    Forfatter
    ved Universidad de Alicante

Laura Stendardi

  • Tilknyttet:
    Forfatter
    ved Università degli Studi di Firenze
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