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Ibcao Bathymetry Data

stevens

Emodnet Dataset ID (LID)
0000145301
id
9795
Dataset name
stevens
File name
20230303/stevens-3996.xyz
Data format
xyz (tsv)
File size
1561694
Dataset version
1
Seabed source ID (SID)
1499
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
Stevens, Laura A.
Originator centre
National Science Foundation; Woods Hole Oceanographic Institution
Data provider
University of California Irvine Department of Earth System Science
Spatial reference system
EPSG:3996
Abstract
Measurements of near-ice hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. In this study we pair detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as close as 150 m from the ice–ocean interface of the Saqqarliup sermia–Sarqardleq Fjord system, West Greenland, with modeled and observed subglacial discharge locations and magnitudes. We find evidence of two main types of subsurface glacially modified water (GMW) with distinct properties and locations. The two GMW locations also align with modeled runoff discharged at separate locations along the grounded margin corresponding with two prominent subcatchments beneath Saqqarliup sermia. Thus, near-ice observations and subglacial discharge routing indicate that runoff from this glacier occurs primarily at two discrete locations and gives rise to two distinct glacially modified waters. Furthermore, we show that the location with the largest subglacial discharge is associated with the lighter, fresher glacially modified water mass. This is qualitatively consistent with results from an idealized plume model.
URL
https://tc.copernicus.org/articles/10/417/2016/
Operator who enters this information
silvia
File creation time
2021-03-05 12:07:29+00
Metadata modification time
2023-03-03 14:33:07.529167+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 14:07:00 +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.