Langhorne, Patricia J; Leonard, Gregory H; Gough, Alexander J; Hughes, Kenneth G; Haas, Christian; Beckers, Justin F; Price, Daniel; Barnsdale, Kelvin; Rack, Wolfgang; Brett, Gemma Marie (2021): Drill hole measurements of fast ice and sub-ice platelet layer thickness, and snow depth in McMurdo Sound - November/December 2011 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.933079
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Abstract:
The thicknesses of sea ice and sub-ice platelet layer were measured at regular intervals on fast ice in McMurdo Sound, Antarctica in November and December of 2011. 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 metal ruler. 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 5 km apart.
Related to:
Brett, Gemma Marie; Irvin, Anne; Rack, Wolfgang; Haas, Christian; Langhorne, Patricia J; Leonard, Gregory H (2020): Variability in the Distribution of Fast Ice and the Sub‐ice Platelet Layer Near McMurdo Ice Shelf. Journal of Geophysical Research: Oceans, 125(3), e2019JC015678, https://doi.org/10.1029/2019JC015678
Brett, Gemma Marie; Leonard, Gregory H; Rack, Wolfgang; Haas, Christian; Langhorne, Patricia J (in review): Winter growth and tidal variability of the sub-ice platelet layer observed with electromagnetic induction soundings. The Cryosphere Discussions, https://doi.org/10.5194/tc-2021-61
Brett, Gemma Marie; Price, Daniel; Rack, Wolfgang; Langhorne, Patricia J (2021): Satellite altimetry detection of ice-shelf-influenced fast ice. The Cryosphere, 15(8), 4099-4115, https://doi.org/10.5194/tc-15-4099-2021
Cheng, Chen; Jenkins, Adrian; Holland, Paul; Wang, Zhaomin; Liu, Chengyan; Xia, Ruibin (2019): Responses of sub-ice platelet layer thickening rate and frazil-ice concentration to variations in ice-shelf water supercooling in McMurdo Sound, Antarctica. The Cryosphere, 13(1), 265-280, https://doi.org/10.5194/tc-13-265-2019
Haas, Christian; Langhorne, Patricia J; Rack, Wolfgang; Leonard, Gregory H; Brett, Gemma Marie; Price, Daniel; Beckers, Justin F (2021): Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica. The Cryosphere, 15(1), 247-264, https://doi.org/10.5194/tc-15-247-2021
Hoppmann, Mario; Richter, Maren E; Smith, Inga J; Jendersie, Stefan; Langhorne, Patricia J; Thomas, David N; Dieckmann, Gerhard S (2020): Platelet ice, the Southern Ocean's hidden ice: a review. Annals of Glaciology, 61(83), 341-368, https://doi.org/10.1017/aog.2020.54
Hughes, Kenneth G; Langhorne, Patricia J; Leonard, Gregory H; Stevens, Craig L (2014): Extension of an Ice Shelf Water plume model beneath sea ice with application in McMurdo Sound, Antarctica. Journal of Geophysical Research: Oceans, 119(12), 8662-8687, https://doi.org/10.1002/2013JC009411
Langhorne, Patricia J; Hughes, Kenneth G; Gough, Alexander J; Smith, Inga J; Williams, Michael J M; Robinson, Natalie J; Stevens, Craig L; Rack, Wolfgang; Price, Daniel; Leonard, Gregory H; Mahoney, Andrew R; Haas, Christian; Haskell, Timothy G (2015): Observed platelet ice distributions in Antarctic sea ice: An index for ocean-ice shelf heat flux. Geophysical Research Letters, 42(13), 5442-5451, https://doi.org/10.1002/2015GL064508
Price, Daniel; Beckers, Justin; Ricker, Robert; Kurtz, N T; Rack, Wolfgang; Haas, Christian; Helm, Veit; Hendricks, Stefan; Leonard, Gregory H; Langhorne, Patricia J (2015): Evaluation of CryoSat-2 derived sea-ice freeboard over fast ice in McMurdo Sound, Antarctica. Journal of Glaciology, 61(226), 285-300, https://doi.org/10.3189/2015JoG14J157
Price, Daniel; Soltanzadeh, Iman; Rack, Wolfgang; Dale, Ethan (2019): Snow-driven uncertainty in CryoSat-2-derived Antarctic sea ice thickness – insights from McMurdo Sound. The Cryosphere, 13(4), 1409-1422, https://doi.org/10.5194/tc-13-1409-2019
Funding:
Coverage:
Median Latitude: -77.760722 * Median Longitude: 165.648395 * South-bound Latitude: -77.873333 * West-bound Longitude: 164.800000 * North-bound Latitude: -77.566700 * East-bound Longitude: 166.500000
Date/Time Start: 2011-11-23T00:00:00 * Date/Time End: 2011-12-05T00:00:00
Event(s):
McMurdo-2011_1 * Latitude: -77.766667 * Longitude: 166.400000 * Date/Time: 2011-11-23T00:00:00 * Location: McMurdo Sound * Method/Device: Ice drill (ICEDRILL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Brett, Gemma Marie | |||
| 2 | Date/Time of event | Date/Time | Brett, Gemma Marie | |||
| 3 | Longitude of event | Longitude | Brett, Gemma Marie | |||
| 4 | Latitude of event | Latitude | Brett, Gemma Marie | |||
| 5 | Identification | ID | Brett, Gemma Marie | Object | ||
| 6 | Sea ice thickness | EsEs | m | Brett, Gemma Marie | ||
| 7 | Sub-ice platelet-layer thickness | SIPL | m | Brett, Gemma Marie | ||
| 8 | Freeboard | Freeboard | m | Brett, Gemma Marie | ||
| 9 | Snow thickness | Snow thick | m | Brett, Gemma Marie |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
215 data points