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Ibcao Bathymetry Data

rignot 2012-2013

Emodnet Dataset ID (LID)
0000130901
id
9791
Dataset name
rignot 2012-2013
File name
20230303/rignot-2012-2013-3996.xyz
Data format
xyz (tsv)
File size
2326039
Dataset version
1
Seabed source ID (SID)
1495
Seabed data category (TID)
Singlebeam — depth value collected by a single beam echo-sounder (code 10)
Included in IBCAO gridding
No (code 0)
Cruise ID
0
Chief scientist
Rignot, Eric
Start date
2012
End date
2013
Date format
Only year (code Y)
Originator centre
University of California Irvine Department of Earth System Science
Data provider
University of California Irvine Department of Earth System Science
Spatial reference system
EPSG:3996
Abstract
Marine-terminating glaciers control most of Greenland's ice discharge into the ocean, but little is known about the geometry of their frontal regions. In this study we use side-looking, multibeam echo sounding observations to reveal that their frontal ice cliffs are grounded deeper below sea level than previously measured and their ice faces are neither vertical nor smooth but often undercut by the ocean and rough. Deep glacier grounding enables contact with subsurface, warm, salty Atlantic waters (AW) which melts ice at rates of meters per day. We detect cavities undercutting the base of the calving faces at the sites of subglacial water (SGW) discharge predicted by a hydrological model. The observed pattern of undercutting is consistent with numerical simulations of ice melt in which buoyant plumes of SGW transport warm AW to the ice faces. Glacier undercutting likely enhances iceberg calving, impacting ice front stability and, in turn, the glacier mass balance.
URL
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015GL064236
Operator who enters this information
silvia
File creation time
2021-03-05 12:06:01+00
Metadata modification time
2023-03-03 14:33:07.517859+00
preprocess
https://git.bolin.su.se/rez/seabed2030-preprocess/-/blob/master/bedmachine_new_sources.py
Ibcao data status
upcoming

Revisions

Version 4

Mon, 23 Oct 2023 14:25:46 +0200

Updated status to done after final check.

Version 3

Wed, 27 Sep 2023 14:10:24 +0200

Data were cleaned of outliers, metadata was corrected and added, status set to finalising pending final check in grid.

Version 2

Mon, 11 Sep 2023 14:07:28 +0200

Data were added to the grid and weight and gridding resolution were assigned.

Version 1

Fri, 03 Mar 2023 15:33:07 +0100

Data were unzipped from dataset #1255, split into several datasets, each converted from matlab to xyz and transformed from EPSG 3413 to 3996 using pre-processing script
Knut and Alice Wallenberg Foundation (KAW) and Swedish Research Council (VR) financed the Oden multibeam system and the installation was financed by the Swedish Maritime Administration. The Oden expeditions were organized by the Swedish Polar Research Secretariat. This Mapping Repository is a part of the Bert Bolin Centre for Climate Research data archive.