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  GNS20303 - Kamb Ice Stream (Antarctica) Grounding Line Mooring data

 

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Title
GNS20303 - Kamb Ice Stream (Antarctica) Grounding Line Mooring data
Creator
GNS20303
Creator
ASP P1 - ANTARCTIC ICE DYNAMIC
Creator
Craig Stevens
Creator
GNS20303
Description
Oceanographic data from field seasons at the Kamb Ice Stream grounding line (82°S 47.0464' 155°W 15.7601') a region of arrested ice flow into the eastern margin of the Ross Ice Shelf. The field site, around 5 km offshore from the grounding line, was focused around a hot water borehole to access the ~30 m thick ocean cavity. We measured the water column structure of the ocean cavity at KIS1/HWD1 over a week-long period that spanned from spring tides to neap tides. The observations captured salinity, temperature and turbidity structure using various precision ocean instruments. Over the spring-neap period the stratification shifts from one where the overarching central quasi-stratification has gradient regions to a simple two-layer structure - and then back again. Some ephemera are also observed like occasional near-surface layers both under the ice and at the bed as well as some internal instability. In addition, we describe the first several months of timeseries data from an on-going hydrographic mooring deployed to report ocean currents and temperature and salinity. The tidal currents appear to be stronger than model estimates and there is a clear estuarine residual flow.
Resource Type
dataset
Format
ascii
Format
team Q drive and NZODN
Source
In progress
Source
Postcard
Rights Management
Project (within NIWA) & external (MBIE ASP)
Date Modified
9:31:11 on 13 October 2020
Resource Identifier
5edececced725
 

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