FLOX spectrometer monitoring at the Carbon-flux tower in Adventdalen. (SIOS Instrument #49 - FLOX)

Establishment of a hyperspectral spectrometer (FLOX-Ocean Optics) at the EddyCovariance facility (carbon-flux tower) in Adventdalen which will give time-series of very detailed spectral properties (spectral resolution <1 nm) included sun induced fluorescence (of vegetation which will be used for calibration of NDVI-sensors in Adventdalen.

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Project type

  • field work
  • remote sensing
  • long-term monitoring
  • sios


  • terrestrial biology
  • cryosphere

Project Keywords

  • biosphere / vegetation / chlorophyll

Fieldwork information

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Numerous satellites are continuously monitoring the arctic and an overwhelming amount of environmental remote sensing data is collected in northern areas. However, analyzing and application of these data calls for information on processes and changes taking place on the ground. There is an urgent need for ground truth data. Available in situ data on Svalbard are scarce, lack coordinated methodology, and long-term time series of environmental parameters are highly requested. The SIOS initiative on environmental and vegetation monitoring will in the first hand take place in Adventdalen and Ny-Ålesund. During the project period initiatives will be taken to include the Hornsund as an additional study site. All three locations have ongoing interdisciplinary research projects and existing infrastructure for monitoring seasonal changes in vegetation and snow. The major project aim is to establish a distributed set of reference sites (calibration/validation) for long time serial monitoring of vegetation-environment changes on Svalbard. The study design is based on: a) permanent sites/plots where 2 m tall racks are equipped with automatic time-laps cameras and data loggers sampling environmental data, b) high resolution time-laps camera mounted up in the mountainside surveying the study areas, c) establishment of a hyperspectral spectrometer (FLOX-Ocean Optics) at the EddyCovariance facility (carbon-flux tower) in Adventdalen which will give time-series of very detailed (spectral resolution <1 nm) spectral properties of vegetation which will be used for intercalibration of all the sensors in Adventdalen and. In addition the FLOX instrument will provide Sun Induced Fluorescence measurements (SIF) which will be compared with satellite based SIFs (FLEX, OCO-2/3 etc.) and carbon-flux measurements from the EddyCovariance-tower. c) collection, calibration and analysis of remote sensing data ranging from very high (0,5-2m) to more coarse scale resolutions (Landsat/Sentinel 2/3). These cal-val sites will be part of the Nordic NordSpec infrastructure ( for spectral data collection, with further links to global terrestrial ecological infrastructure like the EddyCovariance facility in Adventdalen ( headed by the University of Lund. The use of remotely sensed sun-induced chlorophyll fluorescence (SIF) has recently emerged as a promising approach for tracking vegetation photosynthesis and global terrestrial gross primary productivity (GPP). The established cooperation between research groups will perform research on harmonizing of methodology and instruments for monitoring seasonal change, and sharing information to strengthen analysis with larger and more representative spatial distributed data sets. Hence, this project will provide ground reference data for the remote sensing community as well as advance current knowledge within the field of plant ecology. The racks and landscape cameras provide crucial data for analyzing relationships between vegetation indices (NDVI, EVI, PRI and others), soil properties, temperature sums and length of growing season, plant phenology and plant productivity for the main vegetation types in terrestrial tundra ecosystems. The FLOX-spectrometer at the carbon-flux tower will provide a very important and direct link between the carbon flux measurements and satellite remote sensing. Project metadata will be provided and implemented in the SIOS data management system service.

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