Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
An Optical Sensor Network for Vegetation Phenology Monitoring and Satellite Data Calibration
Lund Univ, Dept Earth & Ecosyst Sci, SE-22362 Lund, Sweden..ORCID-id: 0000-0001-7644-6517
Lund Univ, Dept Earth & Ecosyst Sci, SE-22362 Lund, Sweden..ORCID-id: 0000-0003-3100-7814
Lund Univ, Dept Earth & Ecosyst Sci, SE-22362 Lund, Sweden..
Univ Copenhagen, Dept Geog & Geol, DK-1350 Copenhagen K, Denmark..
Vise andre og tillknytning
Ansvarlig organisasjon
2011 (engelsk)Inngår i: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 11, nr 8, s. 7678-7709Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present a network of sites across Fennoscandia for optical sampling of vegetation properties relevant for phenology monitoring and satellite data calibration. The network currently consists of five sites, distributed along an N-S gradient through Sweden and Finland. Two sites are located in coniferous forests, one in a deciduous forest, and two on peatland. The instrumentation consists of dual-beam sensors measuring incoming and reflected red, green, NIR, and PAR fluxes at 10-min intervals, year-round. The sensors are mounted on separate masts or in flux towers in order to capture radiation reflected from within the flux footprint of current eddy covariance measurements. Our computations and model simulations demonstrate the validity of using off-nadir sampling, and we show the results from the first year of measurement. NDVI is computed and compared to that of the MODIS instrument on-board Aqua and Terra satellite platforms. PAR fluxes are partitioned into reflected and absorbed components for the ground and canopy. The measurements demonstrate that the instrumentation provides detailed information about the vegetation phenology and variations in reflectance due to snow cover variations and vegetation development. Valuable information about PAR absorption of ground and canopy is obtained that may be linked to vegetation productivity.

sted, utgiver, år, opplag, sider
2011. Vol. 11, nr 8, s. 7678-7709
Emneord [en]
optical sampling, Normalized Difference Vegetation Index (NDVI), remote sensing, spectral sensor, photosynthetically active radiation (PAR), phenology
HSV kategori
Identifikatorer
URN: urn:nbn:se:polar:diva-3506DOI: 10.3390/s110807678ISI: 000294253900022PubMedID: 22164039OAI: oai:DiVA.org:polar-3506DiVA, id: diva2:1083470
Tilgjengelig fra: 2017-03-21 Laget: 2017-03-21 Sist oppdatert: 2017-11-29

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstPubMed

Søk i DiVA

Av forfatter/redaktør
Eklundh, LarsJin, Hongxiao
I samme tidsskrift
Sensors

Søk utenfor DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric

doi
pubmed
urn-nbn
Totalt: 24 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf