Drill hole measurements of fast ice and sub-ice platelet layer thickness, and snow depth in McMurdo Sound - November 2016


The thicknesses of sea ice and sub-ice platelet layer were measured at regular intervals on fast ice in McMurdo Sound, Antarctica in November of 2016. Thirty-metre cross-profiles were established at each site, and snow depths were measured at 0.5 m intervals along the transect lines with a MagnaProbe. A mean snow depth for each site was derived from these 120 measurements. Freeboard, sea ice thickness and sub-ice platelet layer thickness were recorded at five locations at each site - at the central crossing point and at the end points of each transect. The mean of these was then calculated and taken as representative of the site. Ice thicknesses were measured by using a tape measure with a brass T-anchor attached at the zero mark. This was deployed vertically through the drill-hole and allowed to rotate to a horizontal alignment when exiting the bottom of the drill-hole at the ice-ocean interface. From this position the anchor is slowly pulled upwards until some resistance is met and the first measurement is taken. This resistance is taken to mark the sub-ice platelet layer/ocean interface. The tape measure is then pulled harder, forcing the bar to pass through the sub-ice platelet layer until it sits flush against the sea ice/sub-ice platelet layer interface where a second measurement is taken. Measurement sites were about 10 km apart.

DOI https://doi.org/10.1594/PANGAEA.933077
Related Identifier References https://doi.org/10.1029/2019JC015678
Related Identifier References https://doi.org/10.5194/tc-2021-61
Related Identifier References https://doi.org/10.5194/tc-15-247-2021
Related Identifier References https://doi.org/10.1017/aog.2020.54
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.933077
Creator Langhorne, Patricia J ORCID logo; Leonard, Gregory H ORCID logo; Brett, Gemma Marie ORCID logo; Rack, Wolfgang (ORCID: 0000-0003-2447-377X); Haas, Christian ORCID logo; Xie, Hongjie ORCID logo; Tian, Liuxi
Publisher PANGAEA
Publication Year 2021
Funding Reference Antarctica New Zealand https://doi.org/10.13039/501100001546 Crossref Funder ID K066_2016 Logistics support under K066_2016 event; National Science Foundation https://doi.org/10.13039/100000001 Crossref Funder ID 134717 Polynyas, ice production, and seasonal evolution in the Ross Sea
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 95 data points
Discipline Earth System Research
Spatial Coverage (163.926W, -77.817S, 166.400E, -77.183N); McMurdo Sound
Temporal Coverage Begin 2016-11-07T00:00:00Z
Temporal Coverage End 2016-11-20T00:00:00Z