Identification

Title

Simulation of the Transient Climate of the Last 21,000 Years (TraCE-21ka)

Alternative title(s)

d651050

Abstract

<p>This TraCE-21ka dataset contains output from the full TraCE simulation from 22,000 years before present (22ka) to 1990 CE as well as single-forcing sensitivity simulations of varying lengths. These results are from a fully-coupled, non-accelerated atmosphere-ocean-sea ice-land surface CCSM3 simulation at the T31_gx3 resolution. For the full TraCE simulation, the model is forced with transient greenhouse gas concentrations and orbitally-driven insolation changes. Transient boundary conditions include the ICE-5G ice sheets - extent and topography, and changing paleogeography as sea level rises from its Last Glacial Maximum low stand to modern levels. We also prescribe a transient scenario of meltwater forcing to the oceans from the retreating ice sheets. Vegetation is prognostic.</p> <p>The following CCSM3 simulations are available:</p> <p>[TraCE] full TraCE simulation, with transient forcing changes in greenhouse gases, orbitally-driven insolation variations, ice sheets and meltwater fluxes.</p> <p>[TraCE-ORB] with only transient orbital forcing, all other forcings and boundary conditions remain at the full TraCE state of 22ka.</p> <p>[TraCE-GHG] with only transient greenhouse gas forcing, all other forcings and boundary conditions remain at the full TraCE state of 22ka.</p> <p>[TraCE-ICE] with only changing continental ice sheets, all other forcings and boundary conditions remain at the full TraCE state of 19ka.</p> <p>[TraCE-MWF] with only transient Northern Hemisphere meltwater fluxes, all other forcings and boundary conditions remain at the full TraCE state of 19ka.</p> <p>[TraCE-ORB-17ka] with only transient orbital forcing, all other forcings and boundary conditions remain at the full TraCE state of 17ka.</p> <p>[TraCE-GHG-17ka] with only transient greenhouse gas forcing, all other forcings and boundary conditions remain at the full TraCE state of 17ka. </p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d651050/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d651050/dataaccess/

protocol: https

name: Data Access

description: Related Link

function: download

Unique resource identifier

code

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

climatologyMeteorologyAtmosphere

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2021-03-30

Keyword set

keyword value

CESM > NCAR Community Earth System Model

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2021-08-04

Frequency of update

notPlanned

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Creative Commons Attribution 4.0 International License

Limitations on public access

None

Responsible organisations

Responsible party

organisation name

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

NSF NCAR Geoscience Data Exchange

email address

datahelp@ucar.edu

web address

https://gdex.ucar.edu

name: NSF NCAR Geoscience Data Exchange

description: The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research.

function: download

responsible party role

pointOfContact

Metadata date

2025-10-09T01:37:01Z

Metadata language