Details of Interfaces and Ocean Heat Flux derived from SIMBA_2015a and SIMBA_2015f data during N-ICE campaign in winter 2015.

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Dataset identification

Title of datasetInterfaces and Ocean Heat Flux derived from SIMBA_2015a and SIMBA_2015f data during N-ICE campaign in winter 2015.
Narrative summary of datasetWe defined the interfaces between the air/snow, snow/ice, and ice/ocean and calculated the ocean heat flux for two SIMBA recordings (SIMBA2015a and SIMBA_2015f) of repeated temperature profiles at 6h interval and 2cm vertical resolution, during N-ICE 2015 experiment floe1. The snow/ice interface is derived from the sharp contrast in the diffusivity proxy values between both media. The snow/ice interface does not change except for slush formation associated with flooding events. The air/snow interface is calculated using simultaneous information from the vertical gradient of the temperature and the standard deviation over 24, 48, and 72 h period. Snow accumulation of more than 10 centimeters happened at different time for the 2 SIMBA. The ice/ocean interface is estimated from temperature profiles alone since the winter sea-ice remains colder than the ocean. The ocean just below the ice is at or just above the freezing temperature (estimated from a near surface conductivity-temperature-depth (CTD) sensor see Koenig et al. [2016]). The method detects (1) the first sensor, downward of the snow/ice interface, with a temperature above the ocean freezing temperature and (2) the last sensor in the ice with a temperature below the mean ocean temperature by at least twice the ocean temperature standard deviation in that profile. The ice/ocean interface is then defined as half way between the last sensor in the ice and the first sensor in the ocean. Note it take 3-4 days for the deployment hole to refreeze. Then the ice thickness remains constant up to 20 February when floe1 breaks. Simba_2015f stops working and SIMBA_2015a features basal melt events corresponding to temperature changes in the ocean. The consistency of the 3 interfaces estimate is validated with the thermal diffusivity proxy and the vertical and temporal derivatives of temperature. The ocean heat flux is derived from the latent heat flux which is directly proportional to the change in time of the ice/ocean interface depth and the conductive heat flux in the lower portion of the ice estimated 6 cm above the ice/ocean interface. The ocean heat flux values for SIMBA_2015a and SIMBA2015f range from -50 to 350 W/m2, and -50 to 150 W/m2 respectively, while the basal melt events associated with ocean temperature increase stand out in SIMBA_2015a.   The SIMBA data are available through the Norwegian Polar Institute’s data center (https://data.npolar.no/dataset/6ed9a8ca-95b0-43be-bedf-8176bf56da80) and the method of interface detection is thoroughly described in Provost et al. (2017). Note that all time series have been smoothed with a 36-h running mean.   Provost, C., N. Sennechael, J. Miguet, P. Itkin, A. Rosel, Z. Koenig, N. Villacieros-Robineau, and M. A. Granskog (2017), Observations of flooding and snow-ice formation in a thinner Arctic sea-ice regime during the N-ICE2015 campaign: Influence of basal ice melt and storms, J. Geophys. Res. Oceans, 122, 7115–7134, doi:10.1002/2016JC012011. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Supporting documentationhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JC012424
https://www.nature.com/articles/s41598-019-45574-5
Start date2015-01-15
End date2015-03-16

Responsible organisations

CountryFrance
Organisation nameIfremer, Scientific Information Systems for the sea
Role of organisationDataset Holding Organisation
CountryFrance
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher
How to citeSennechael Nathalie, Provost Christine (2015). Interfaces and Ocean Heat Flux derived from SIMBA_2015a and SIMBA_2015f data during N-ICE campaign in winter 2015. SEANOE. https://doi.org/10.17882/59709

Dataset availability

Original dataset download linkhttps://cloud.emodnet-ingestion.eu/index.php/s/R6uphof3dOdLC8N
Dataset formatNetwork Common Data Form
Public accessNo limitations
License for useCC-BY 4.0
TypeDataset
DOIhttps://doi.org/10.17882/59709

Locations

Map
Latitude north boundary84
Longitude east boundary24
Latitude south boundary80
Longitude west boundary8
Sea areaArctic Ocean

Data types, collection and processing

Observation typeWater column temperature and salinity
Meteorology
Fluxes
ParameterHeat fluxes between the water column and the atmosphere
Other meteorological measurements
Temperature of the water column
Instrument typeSea ice remote sensors
Platform typeresearch vessel
Platform nameLance
Data quality processing informationProcessed data

Process information

Submitting organisationSorbonne University
Submission identifier (UUID)a53ad03f-3539-5393-3937-000000059709
Date of dataset creation2015-07-15
Date of dataset revision2019-12-09
Date of metadata creation2020-3-22
Date of metadata latest revision2021-11-29
Date of publishing2021-12-16
Processing data centreIfremer, Scientific Information Systems for the sea
Summary record-ID980