Cristin-resultat-ID: 1152957
Sist endret: 24. november 2016 09:33
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Use of unmanned aircraft systems (UAS) in a multi-scale vegetation index study of arctic plant communities in Adventdalen on Svalbard

Bidragsytere:
  • Hans Tømmervik
  • Stein Rune Karlsen
  • Lennart Nilsen
  • Bernt Johansen
  • Rune Storvold
  • Anna Zmarz
  • mfl.

Tidsskrift

EARSeL eProceedings
ISSN 1729-3782
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Publisert online: 2014
Volum: 13
Hefte: S1
Sider: 47 - 52
Open Access

Beskrivelse Beskrivelse

Tittel

Use of unmanned aircraft systems (UAS) in a multi-scale vegetation index study of arctic plant communities in Adventdalen on Svalbard

Sammendrag

Use of Unmanned Aircraft Systems (UAS) gives the opportunity to carry out research with a re-duced environmental footprint. Unmanned aircraft, including both fixed wing and multi rotor types (helicopters) allow us to collect very high resolution image data for vegetation mapping without the need for any personnel walking into the site and thereby potentially disturbing the sensitive Arctic ecosystems. The main aim of this project was to explore the feasibility of UAS-based vegetation mapping and extraction of vegetation indices (NDVI) for a range of different Arctic plant communi-ties including dense marshes, moss tundra communities and different tundra heaths. The study area of Adventdalen valley on Svalbard, Arctic Norway, is located at 71.2°N 16°E and experiences a dry Arctic climate with a mean July temperature of about 6°C. The UAS was a fixed wing aircraft instrumented with a Red, Green, Blue (RGB) compact camera and a Normalized Difference Vege-tation Index (NDVI) camera taking pictures from 100 metres altitude with highest ground resolution of 2.5 cm capable of mapping 2-3 km2 per flight. The study area’s two main plant communities; the Arctic bell heath and a graminoid rich Polar Willow heath were easily detected both in the NDVI and RGB images. In addition, wet moss tundra and mires were separated from the heath commu-nities. In the NDVI image the moss-dominated mires were difficult to separate from the graminoid dominated mires in most cases, but they were well separable in RGB colour space. Also in situ NDVI measurements by a handheld passive proximal sensor were simultaneously done during the flight campaign. These measurements were analysed in order to correlate the species level NDVI and community level NDVI measurements with the NDVI images acquired at a variety of spatial resolutions by the UAS. The analysis shows that NDVIs of four main plant species at in situ leaf and community levels were significantly correlated (R2 = 0.60, p

Bidragsytere

Hans Tømmervik

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

Stein Rune Karlsen

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
Aktiv cristin-person

Lennart Nilsen

  • Tilknyttet:
    Forfatter
    ved Institutt for arktisk og marin biologi ved UiT Norges arktiske universitet

Bernt Johansen

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
Aktiv cristin-person

Rune Storvold

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
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