Data Summary

Spatio-temporally continuous temperature monitoring using optical fibers (Loop1) in the internal forest areas at Alaska in 2018
Supplement to : Saito, K., G. Iwahana, H. Ikawa, H. Nagano, and R. C. Busey: Links between annual surface temperature variation and land cover heterogeneity for a boreal forest as characterized by continuous, fibre-optic DTS monitoring. Geosci. Instrum. Method. Data Syst., 7, 223-234, 2018, DOI: 10.5194/gi-7-223-2018

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    Summary

  • A fibre-optic DTS (distributed temperature sensing) system using Raman-scattering optical time domain reflectometry was deployed to monitor a boreal forest research site in the interior of Alaska. Surface temperatures range between -40 C in winter and 30 C in summer at this site.In parallel experiments, a fibre-optic cable sensor system (multi-mode, GI50/125, dual core; 3.4 mm), monitored at high resolution, (0.5m intervals at every 30 min) ground surface temperatures across the landscape. In addition, a highresolution vertical profile was acquired at one-metre height above the upper subsurface. The total cable ran 2.7 km with about 2.0 km monitoring a horizontal surface path. Sections of the cable sensor were deployed in vertical coil configurations (1.2m high) to measure temperature profiles from the ground up at 5mm intervals. Measurements were made continuously over a 2-year interval from October 2012 to October 2014. Vegetation at the site (Poker Flat Research Range) consists primarily of black spruce underlain by permafrost. Land cover types within the study area were classified into six descriptive categories: relict thermokarst lake, open moss, shrub, deciduous forest, sparse conifer forest, and dense conifer forest. The horizontal temperature data exhibited spatial and temporal changes within the observed diurnal and seasonal variations. Differences in snow pack evolution and insulation effects co-varied with the land cover types.The apparatus used to monitor vertical temperature profiles generated high-resolution (ca. 5 mm) data for air column, snow cover, and ground surface.

    Dataset citation

  • Saito, K., G. Iwahana, H. Ikawa, H. Nagano, R. Busey, 2018, Spatio-temporally continuous temperature monitoring using optical fibers (Loop1) in the internal forest areas at Alaska in 2018, 1.00, Arctic Data archive System (ADS), Japan, https://ads.nipr.ac.jp/dataset/A20190625-003

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    Spatial coverage

  • N:  65.12°   S:  65.12°   E:  -147.49°   W:  -147.5°  

    Temporal coverage

  • 2018-04-01   -   2019-03-31

    License

  •  CC BY 4.0

DATA CONTORIBUTOR & GROUP

  • Kazuyuki Saito
    (JAMSTEC)
  • Go Iwahana
    (UAF)
  • Hiroki Ikawa
    (AFFRC)
  • Hirohiko Nagano
    (JAEA)
  • Robert Busey
    (UAF)

PARAMETERS

  • SOIL TEMPERATURE
  • ICE GROWTH/MELT
  • LAND SURFACE TEMPERATURE

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