Date (Creation)

2025-01-28

Date (Revision)

2025-01-28

Date (Publication)

2025-01-28

Date (released)

2025-01-28

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/8f5f8ce3-9bd9-40b4-9f09-14a0d680a838

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/02002

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/V000691/1

Codespace

award

Other citation details

Please cite this item as: Caton Harrison, T., Lock, A., Bracegirdle, T., King, J., & Lu, H. (2025). Surface fields and vertical cross-sections from Met Office Unified Model sensitivity experiments run over a sector of East Antarctica, 2011 - 2017 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/8f5f8ce3-9bd9-40b4-9f09-14a0d680a838

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Caton Harrison, Thomas		Author
UK Met Office	Lock, Adrian		Author
British Antarctic Survey	Bracegirdle, Thomas		Author
British Antarctic Survey	King, John		Author
British Antarctic Survey	Lu, Hua		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Atmosphere > Atmospheric Winds > Surface Winds

Theme

• Antarctica

• Met Office Unified Model

• model

• sensitivity

• winds

Place

• Mawson Station, Prydz Bay, Cape Damley, Enderby Land, Mawson Coast Antarctica

GEMET - INSPIRE themes, version 1.0

• Atmospheric conditions

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Larger work citation

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere

Begin date

2011-02-01

End date

2017-01-31

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The MetUM was run in a limited area setup with one-way nesting, covering 5 summer and 5 winter months randomly chosen from the period 2010-2017. These months represent a range of Southern Annular Mode values (reflecting large-scale conditions), average 10 m wind speeds, and offshore sea ice concentrations. A regional domain with 12 km grid spacing, consisting of 300 by 300 grid points, is centred on Mawson station in east Antarctica. All experiments use 70 vertical levels with a 40 km upper boundary. Within the 12 km domain, there is a 4 km nested domain, also with 300 by 300 grid points.

The 4 km domain receives its initial and lateral boundary conditions from the 12 km simulation, which is set up as a series of hindcasts over the historical period. The 12 km regional model is initialized every 12 hours with ERA5 data. Each hindcast runs for 24 hours, with ERA5 lateral boundary conditions provided at the domain boundaries at the 12-hour forecast point. Only the second half of each hindcast is retained, allowing for a 12-hour spin-up period and producing a continuous time series by joining the spin-up-free parts of the 12-hourly hindcasts.

The data are for a randomly selected set of 5 summer and 5 winter months between 2011 and 2017. Two types of files are included, fields and slices. Data files are named according to suite_name (label for the model suite), domain_name (label for the region), start_date (start date), end_date (end date), exp_name (name of the sensitivity experiment) and res_name (label for the horizontal grid spacing).

Field data are structured like:

10m zonal winds: "{base_path}/{suite_name}_{domain_name}_x_wind_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

10m meridional winds: "{base_path}/{suite_name}_{domain_name}_y_wind_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

2m air temperature: "{base_path}/{suite_name}_{domain_name}_air_temperature_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

Mean sea level pressure: "{base_path}/{suite_name}_{domain_name}_air_pressure_at_sea_level_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

Northward wind stress: "{base_path}/{suite_name}_{domain_name}_surface_downward_northward_stress_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

Eastward wind stress: "{base_path}/{suite_name}_{domain_name}_surface_downward_eastward_stress_field_{start_date}_to_{end_date}_{exp_name}_{res_name}.nc"

Vertical slice data are structured like:

Zonal winds: "{base_path}/{suite_name}_{domain_name}_x_wind_slice_{start_date}_to_{end_date}_{exp_name}_{res_name}_62.87.nc"

Meridional winds: "{base_path}/{suite_name}_{domain_name}_y_wind_slice_{start_date}_to_{end_date}_{exp_name}_{res_name}_62.87.nc"

Potential temperature: "{base_path}/{suite_name}_{domain_name}_air_potential_temperature_slice_{start_date}_to_{end_date}_{exp_name}_{res_name}_62.87.nc"

exp_name and res_name come from the following experiments:

Control

exp_name: RA2M_control - Control experiment (RA2 physics tuned for the midlatitudes)

res_name: km12, km4, km40 (12 km, 4 km, 40 km)

Sub-grid Orography

exp_name: gwd_on - Gravity wave drag scheme as in the global model configuration

res_name: km12, km40 (12 km, 40 km)

exp_name: high_nsigma - gwd_on with scaling factor for sub-grid orography increased from 2.5 to 5

res_name: km12, km40 (12 km, 40 km)

exp_name: formdrag_on - Explicitly represents turbulent orographic form drag

res_name: km12 (12 km)

Surface Exchange

exp_name: nol_rough - Switch off the Lupkes sea ice form drag parameterisation

res_name: km12 (12 km)

exp_name: ra3_sea - RA3 air-sea exchange physics with Charnock coefficient varying with wind speed

res_name: km12 (12 km)

Stable Boundary Layer

exp_name: long_tails_sbl - Diffusivity dependence on the Richardson number has a longer tail

res_name: km12 (12 km)

Data quality:

The dataset is complete without any gaps or corruption that the author is aware of. The fidelity of the simulations (i.e. realism with respect to observations) is evaluated against ground, sonde and satellite observations in Caton Harrison et al. (2025) ( https://doi.org/10.1002/qj.5019).

Metadata

File identifier

8f5f8ce3-9bd9-40b4-9f09-14a0d680a838 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-01-28

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact