IAOOS winter SIMBA data during N-ICE 2015 North of Svalbard

Date 2015-07-15
Temporal extent 2015-01-24 -2015-03-16
Author(s) Sennéchael NathalieORCID1, Provost ChristineORCID1, Villacieros-Robineau NicolasORCID1, Calzas MichelORCID2, Guillot Antoine2, Savy Jean-Philippe3, Garracio Magali4, Koenig ZoéORCID1
Affiliation(s) 1 : Laboratoire LOCEAN-IPSL Sorbonne Université (UPMC, Univ. Paris 6)-CNRS-IRD-MNHN, Paris, France
2 : Division Technique de l'INSU/CNRS, Brest, France
3 : Laboratoire d'Etudes en Géophysique et d'Océanographie Spatiales (LEGOS), Toulouse, France
4 : Institut Polaire Francais Paul-Emile Victor (IPEV)
DOI 10.17882/59624
Publisher SEANOE
Keyword(s) sea ice, snow, ice growth, basal melt, flooding, snow-ice, mass balance
Abstract

Two ice mass balance instruments (part of IAOOS7 and IAOOS8 platforms) deployed near 83°N on the same ice floe, documented the evolution of snow and ice conditions in the Arctic Ocean north of Svalbard in Jan-Mar 2015. Frequent profiles of temperature (every 3 hours) and temperature change after 30s and 120s heating (once a day) were recorded. The ratio of the temperature changes after heating provides a proxy for thermal diffusivity. Both instruments documented flooding and snow-ice formation. Flooding was clearly detectable in the simultaneous changes in thermal diffusivity proxy, increased temperature, and heat propagation through the underlying ice. Slush then progressively transformed into snow-ice. Flooding resulted from two different processes; i) after storm-induced break-up of snow-loaded floes for IAOOS8 and ii) after loss of buoyancy due to basal ice melt for IAOOS7. The instrument on IAOOS7 documented basal sea-ice melt over warm Atlantic waters and ocean-to-ice heat flux peaked at up to 400 Wm-2 in winter.

Licence CC-BY-NC
Acknowledgements Equipment and participation to the N-ICE2015 Ice camp (organized by the Norsk Polar Institute, Norway on board R.V. Lance, Granskog et al., 2017) were funded under EQUIPEX IAOOS (Ice Atmosphere Ocean Observing System) (ANR-10-EQPX-32-01).
Sensor metadata

On both IAOOS7 and IAOOS8 platforms, the ice instrument is a SIMBA (SAMS Ice Mass Balance for the Arctic). A SIMBA comprises a GPS and a 5 m long chain cable hanging through air, snow, sea-ice and ocean. The chain comprises solid-state sensors located every 2 cm measuring temperature at approximately 0.18°C accuracy (resolution 1/16°C). The SIMBA also features a heating mode which can be used to discriminate between different media, especially between snow and ice [Jackson et al., 2013].

Data
File Size Format Processing Access
IAOOS7 SIMBA data from N-ICE 2015 campaign North of Svalbard 980 KB NC, NetCDF Raw data Open access
IAOOS8 SIMBA data from N-ICE 2015 campaign North of Svalbard 525 KB NC, NetCDF Raw data Open access
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How to cite 

Sennéchael Nathalie, Provost Christine, Villacieros-Robineau Nicolas, Calzas Michel, Guillot Antoine, Savy Jean-Philippe, Garracio Magali, Koenig Zoé (2015). IAOOS winter SIMBA data during N-ICE 2015 North of Svalbard. SEANOE. https://doi.org/10.17882/59624