Analysis output of the MITgcm ocean model data for the Amundsen Sea (1920 to 2100)

This dataset contains high-resolution oceanographic model outputs generated using the MIT General Circulation Model (MITgcm) to study the projected ocean warming in the Amundsen Sea, Antarctica, under the RCP8.5 scenario. The primary focus of this dataset is to isolate and analyse the contributions of different atmospheric and oceanic drivers - namely, stronger poleward-shifted winds and changes in atmospheric thermodynamics - to future changes in ocean temperature and freshwater fluxes in this region. The spatial focus is on the Amundsen Sea continental shelf, a key area where Circumpolar Deep Water (CDW) intrudes and drives ice shelf melting. Data were generated using MITgcm, a high-resolution regional ocean model. The model was run under different configurations: with all modern atmospheric and oceanic drivers (ALL), with no anthropogenic changes (NONE), with only thermodynamic changes (THERMO), and with only wind changes (WIND). Additional ensemble runs and experiments with transient boundary conditions were performed to assess the robustness of the findings.

Funding:

Computing hours were funded by the UKRI-JSPS project ''Quantifying Human Influence on Ocean Melting of the West Antarctic Ice Sheet'' budget (NE/S011994/1)

Funding comes from the NERC-funded Doctoral Training Partnership INSPIRE DTP.

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01886

Date (Publication): 2024-09-26

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01886

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
NERC EDS UK Polar Data Centre	Turner, K., & Naughten, K.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Oceans > Ocean Circulation > Fresh Water Flux
EARTH SCIENCE > Oceans > Ocean Circulation > Wind-driven Circulation

BAS Free-text keywords

Amundsen Sea
Circumpolar Deep Water
High-resolution modelling
MITgcm
Ocean-Atmosphere Interactions

Use limitation: Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Access constraints: Other restrictions

Other constraints: Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Distance: 1/10degree cosθ

Language: English

Topic category

Oceans

Begin date: 1920

End date: 2100

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http	http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=8a2b18eb-4720-4a40-a52a-b8f571b26b28	GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: For the accuracy and model configuration of MITgcm please see Naughten et al. (2022) and Naughten et al. (2023). The analysis data masks any grid cells not representing the ocean with NaN values. All data was quality controlled and Continuous Integration (CI) testing on the analysis script outputs was implemented where possible.