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Metadata

  • Station or site: CryoNet Station
  • Type: Primary
  • Attribute(s): Research
  • WMO ID (if any):
  • Shape: point
  • Latitude, longitude: 77.5183, -69.0619
  • Altitude and/or range (m): 944
  • Landscape: Icecap
  • Year established: 2012
  • Year-round? Yes
  • Operations contact: Masashi Niwano
  • Science contact: Teruo Aoki
  • Data contact: Hironori Yabuki
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SIGMA-B
Primary CryoNet Station Information

The SIGMA-B site is located on Qaanaaq ice cap of northwest Greenland. The surface condition is snow in winter and snow or ice in summer. An automatic weather station (AWS) was installed on 19 July 2014. In summer seasons after 2012 short-term intensive meteorological and glaciological observations were carried out. The characteristics of the SIGMA-B AWS are (1) one-level measurements of air temperature, relative humidity, wind speed and direction; (2) net radiation measurements in the shortwave and longwave spectral regions; (3) monitoring of the surface condition with an interval camera; and (4) tilt angle monitoring of the main AWS pole with an inclinometer. For all instruments, one-minute sampling and ten-minute averaged data are stored on a data logger, and the hourly data are transported to us via Argos satellite. The electric power is supplied from cyclone batteries in the snow, which are charged by solar panels.

Other Networks to Which This CryoNet Station Belongs

Measurement Methods Used

Data Information

Publications

Aoki, T., Matoba, S., Uetake, J., Takeuchi N. and Motoyama H. (2014): Field activities of the "Snow Impurity and Glacial Microbe effects on abrupt warming in the Arctic" (SIGMA) Project in Greenland in 2011-2013. Bull. Glaciol. Res., 32, doi:10.5331/bgr.32.3, 3-20.

Additional Information Documents

Measurements

The measurements made at SIGMA-B are listed in the following tables. (Note: If End Year is blank, measurements are ongoing.)

Cryosphere Measurements

Element Variable Start Year End Year Frequency
SnowDepth2012Continuous
SnowSnowpack profile2012Continuous
SnowAlbedo2012Continuous
SnowChemistry2012Sporadic
GlacierAccumulationContinuous
GlacierAnnual mass balanceSporadic
GlacierVelocitySporadic
GlacierSurface temperatureContinuous
GlacierSurface albedoContinuous
GlacierIce/firn temperatureContinuous

Atmosphere Measurements

Element Variable Start Year End Year Frequency
MetAir temperatureContinuous
MetHumidity/vapour pressureContinuous
MetWind speed and directionContinuous
MetAir pressureContinuous
MetSnowfallContinuous
MetSensible and latent heatContinuous
RadiationDownwelling shortwaveContinuous
RadiationUpwelling shortwaveContinuous
RadiationDownwelling longwaveContinuous
RadiationUpwelling longwaveContinuous

Last updated: 29 November 2017