Date (Creation)

2017-12-15

Date (Publication)

2017-12-18

Citation identifier

doi:10.4226/77/5a37035ea15b2

Title

Information and documentation - Digital object identifier system

Date (Publication)

2017-12-18

Citation identifier

ISO 26324:2012

Citation identifier

https://doi.org/10.4226/77/5a37035ea15b2

Status

Completed

Topic category

• Oceans

NASA/GCMD Keywords, Version 8.5

• EARTH SCIENCE | OCEANS | OCEAN CIRCULATION | OCEAN CURRENTS

Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research

• OCEANOGRAPHY
• Geophysical Fluid Dynamics
• Physical Oceanography

Keywords (Theme)

• vertical coordinate of center of cell
• vertical coordinate of face of cell
• Cell center separation along Z axis
• Cell face separation along Z axis
• vertical profile of reference density
• longitude East of center of grid cell
• longitude East of southwest corner of grid cell
• latitude North of center of grid cell
• latitude North of southwest corner of grid cell
• Cell center separation in X across western cell wall
• Cell face separation in X along southern cell wall
• Cell center separation in Y across southern cell wal
• Cell face separation in Y along western cell wall
• Model bathymetry
• cosine(alpha) relative to geographic direction at grid cell center
• sine(alpha) relative to geographic direction at grid cell center
• mask of tracer cell
• mask of v cell
• mask of u cell
• Elevation of bottom of lowest model grid cell at tracer points
• Elevation of bottom of lowest model grid cell at u-points
• Elevation of bottom of lowest model grid cell at v-points
• averaged zonal (relative to grid) velocity
• averaged merid. (relative to grid) velocity
• averaged vertical velocity
• averaged potential temperature
• averaged advective potential temperature flux due to u
• averaged advective potential temperature flux due to v
• averaged advective potential temperature flux due to w
• averaged salinity
• averaged advective salt flux due to u
• averaged advective salt due to v
• averaged advective salt flux due to w
• averaged of u^2
• averaged of v^2
• averaged of w^2

Language

English

Character encoding

UTF8

Supplemental Information

Stewart, A. L., Klocker, A., & Menemenlis, D. (2018). Circum‐Antarctic shoreward heat transport derived from an eddy‐ and tide‐resolving simulation. Geophysical Research Letters, 45, 834–845. https://doi.org/10.1002/2017GL075677

Content type

Physical measurement

Name

vertical coordinate of center of cell

Name

rc

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

vertical coordinate of face of cell

Name

rf

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Cell center separation along Z axis

Name

drc

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Cell face separation along Z axis

Name

drf

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

vertical profile of reference density

Name

rho_ref

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/UKMC

Name

Kilograms per cubic metre

Name

longitude East of center of grid cell

Name

xc

Name

degree

Name

longitude East of southwest corner of grid cell

Name

xg

Name

degree

Name

latitude North of center of grid cell

Name

yc

Name

degree

Name

latitude North of southwest corner of grid cell

Name

yg

Name

degree

Name

Cell center separation in X across western cell wall

Name

dxc

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Cell face separation in X along southern cell wall

Name

dxg

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Cell center separation in Y across southern cell wal

Name

dyc

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Cell face separation in Y along western cell wall

Name

dyg

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Name

Model bathymetry

Name

depth

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/ULAA

Name

Metres

Description

alpha = angle of model uVel direction vs geographical East = angle of model vVel direction vs geographical North(AngleCS*uVelc - AngleSN*vVelc, AngleSN*uVelc + AngleCN*vVelc) rotates model velocity to geographical coordinates, where(uVelc,vVelc) is model velocity vector at center of grid cell

Name

cosine(alpha) relative to geographic direction at grid cell center

Name

AngleCS

Name

n/a

Description

alpha = angle of model uVel direction vs geographical East = angle of model vVel direction vs geographical North(AngleCS*uVelc - AngleSN*vVelc, AngleSN*uVelc + AngleCN*vVelc) rotates model velocity to geographical coordinates, where(uVelc,vVelc) is model velocity vector at center of grid cell

Name

sine(alpha) relative to geographic direction at grid cell center

Name

AngleSN

Name

n/a

Description

(0 is land, >0 is wet)

Name

mask of tracer cell

Name

hFacC

Name

n/a

Description

(0 is land, >0 is wet)

Name

mask of v cell

Name

hFacS

Name

n/a

Description

(0 is land, >0 is wet)

Name

mask of u cell

Name

hFacW

Name

n/a

Name

Elevation of bottom of lowest model grid cell at tracer points

Name

rLowC

Name

n/a

Name

Elevation of bottom of lowest model grid cell at u-points

Name

rLowW

Name

n/a

Name

Elevation of bottom of lowest model grid cell at v-points

Name

rLowS

Name

n/a

Description

>0 from West to East

Name

averaged zonal (relative to grid) velocity

Name

u_avg

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/UVAA

Name

Metres per second

Description

>0 from South to North

Name

averaged merid. (relative to grid) velocity

Name

v_avg

Name

m/s

Name

averaged vertical velocity

Name

w_avg

Name

m/s

Name

averaged potential temperature

Name

t_avg

Identifier

http://vocab.nerc.ac.uk/collection/P06/current/UPAA

Name

Degrees Celsius

Name

averaged advective potential temperature flux due to u

Name

ut_avg

Name

deg C m/s

Name

averaged advective potential temperature flux due to v

Name

vt_avg

Name

deg C m/s

Name

averaged advective potential temperature flux due to w

Name

wt_avg

Name

deg C m/s

Name

averaged salinity

Name

s_avg

Name

g/kg

Name

averaged advective salt flux due to u

Name

us_avg

Name

g/kg m/s

Name

averaged advective salt due to v

Name

vs_avg

Name

g/kg m/s

Name

averaged advective salt flux due to w

Name

ws_avg

Name

g/kg m/s

Name

averaged of u^2

Name

usq_avg

Name

m^2/s^2

Name

averaged of v^2

Name

vsq_avg

Name

m^2/s^2

Name

averaged of w^2

Name

wsq_avg

Name

m^2/s^2

Distribution format

• Matlab files (.mat)

OnLine resource

MODEL DATA ACCESS - Full catalogue on IMAS THREDDS (choose HTTPServer option for download of individual files)

OnLine resource

SOURCE DATA ACCESS - model configuration files to understand the model grid layout, integration procedure, parameters etc.

Statement

The LLC_4320 simulation was conducted using the MIT general circulation model [Marshall et al., 1997a,b] on a global Latitude-Longitude-Cap (LLC) grid [Forget et al., 2015] with 1/48 degree horizontal grid spacing and 90 vertical levels. The horizontal grid spacing is less than 1 km over the entire Antarctic continental shelf and slope, with the exception of the tip of the Antarctic Peninsula, which is sufficient to simulate shoreward heat transfer by eddies [St-Laurent et al., 2013; Stewart and Thompson, 2015b]. The model includes the 16 largest-amplitude tidal components globally and partially resolves the internal wave spectrum [Rocha et al., 2016] and thus cross-slope excursions associated with baroclinic tides [Padman et al., 2009]. The LLC_4320 simulation is not directly constrained by observational data, but is a high-resolution continuation of the ECCO2 0.14 degree reanalysis product. The simulation spans September 2011–October 2012, and derives surface fluxes from ECMWF 1/6 degree operational analysis [ECMWF, 2011] combined with an annual climatology of continental runoff [Fekete et al., 2002]. An identically configured simulation was run using 1/24 degree horizontal grid spacing, spanning January 2011 – April 2013, and is referred to as LLC_2160. The model configuration files to understand the model grid layout, integration procedure, parameters etc can be found at http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/llc_hires/llc_4320/. The data are stored in .mat files separated by LLC face number (1, 2, 4 or 5), grid resolution (LLC2160 vs LLC4320), and averaging procedure (averaging all 6-hour snapshots together, '_6hsnapshots', or first averaging 6-hour snapshots into days and then averaging the days, '_dailyavg6h'). The LLC2160 model output is averaged from 03/06/2011 to 04/22/2013 (model time step 92160 to 1586400), while the LLC4320 output is averaged from 09/12/2011 to 11/15/2012 (model time step 10368 to 1495008).

Hierarchy level

Model

Statement

Each file contains the MITgcm grid vectors and time-averaged products of model output variables. Where necessary, the LLC grids have been rotated so that the x-coordinate points east, or approximately east, while the y-coordinate points north, or approximately north. For products between velocities and tracers, the tracers were interpolated linearly onto velocity points before the product was taken.

Hierarchy level

Dataset

Resource scope

Dataset

Title

ISO 19115-3:2018