DOI: 10.25592/uhhfdm.16125
title: UHH CMIP6 Sea Ice Area Collection

description: <strong>Abstract:</strong> This data set comprises time series of the monthly sea-ice area (SIA) in the Northern and Southern Hemisphere based on numerical models participating in CMIP6 (Climate Model Intercomparison Project #6). See description on https://www.cen.uni-hamburg.de/en/icdc/data/cryosphere/cmip6-sea-ice-area.html about how SIA is derived. See https://www.cen.uni-hamburg.de/en/icdc/data/cryosphere/cmip6-sea-ice-area.html to learn about the models included into this CMIP6 archive. SIA time series are provided for historical, piControl,and ssp runs (119, 126, 245, 370, 460, 585). The number of time series provided per run depends on the CMIP6 model; it might be zero.

<strong>Table of contents: </strong>monthly sea-ice area

<strong>Technical Info:</strong>

Northern Hemisphere


 <em><strong>Historical:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_historical; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1980, 466; temporalExtent_startDate: 1850-01-01; temporalExtent_endDate: 2014-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>piControl:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_picontrol; dimensionName: NumberOfMonths, NumberofEnsembles; dimensionValue: 6012, 54; temporalExtent_startDate: 1850-01-01; temporalExtent_endDate: 2350-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp119:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp119; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 57; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp126:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp126; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 117; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp245:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp245; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 245; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp370:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp370; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 160; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp460:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp460; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 15; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp585:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_northern_hemisphere_ssp585; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 189; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none


Southern Hemisphere:


 <em><strong>Historical:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_historical; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1980, 462; temporalExtent_startDate: 1850-01-01; temporalExtent_endDate: 2014-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>piControl:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_picontrol; dimensionName: NumberOfMonths, NumberofEnsembles; dimensionValue: 6012, 54; temporalExtent_startDate: 1850-01-01; temporalExtent_endDate: 2350-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp119:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp119; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 57; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp126:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp126; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 115; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp245:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp245; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 241; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp370:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp370; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 156; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp460:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp460; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 15; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none
 <em><strong>ssp585:</strong></em> standard_name: sea_ice_area; long_name: total_sea_ice_area_in_the_southern_hemisphere_ssp585; dimensionName: NumberOfMonths, TotalNumberofEnsembles; dimensionValue: 1032, 187; temporalExtent_startDate: 2015-01-01; temporalExtent_endDate: 2100-12-31; temporalResolution: monthly; spatialResolution: none; spatialResolutionUnit: none; horizontalResolutionXdirection: none; horizontalResolutionYdirection: none; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none


<strong>Methods:</strong> See description on https://www.cen.uni-hamburg.de/en/icdc/data/cryosphere/cmip6-sea-ice-area.html

<strong>Units</strong> (all variables): 1e6 km<sup>2</sup>

<strong>geoLocations:</strong>

Northern Hemisphere: westBoundLongitude: -180.0 degrees East; eastBoundLongitude: 180.0 degrees East; southBoundLatitude: 35.0 degrees North; northBoundLatitude: 90.0 degrees North; geoLocationPlace: Northern Hemisphere

Southern Hemisphere: westBoundLongitude: -180.0 degrees east; eastBoundLongitude: 180.0 degrees East; southBoundLatitude: -90.0 degrees North; northBoundLatitude: -35.0 degrees North; geoLocationPlace: Southern Hemisphere

<strong>Size: </strong>

Separately per hemisphere: 1 file including all runs (~19 MB), 1 file with historical runs (~9 MB), 1 file with piControl runs (~2.7 MB), 1 file for each ssp run (= 6 files, in total ~7.3 MB) - aka 9 netCDF and 9 ascii-txt files per hemisphere, aka in total 18 netCDF and 18 ascii-txt files with a total volume overall &lt; 200 MB

<strong>Format:</strong> netCDF; ascii-txt

<strong>DataSources: </strong>https://www.wdc-climate.de/ui/q?query=CMIP6&page=0&rows=15  [last access: 2024-11-22]

<strong>Contact:</strong> uhhsia.ifm (at) uni-hamburg.de

<strong>Web page:</strong> https://www.cen.uni-hamburg.de/en/icdc/data/cryosphere/cmip6-sea-ice-area.html
description: CMIP6 model data produced by the various institutions is licensed under a Creative Commons Attribution ShareAlike 4.0 International Licenses. Consult https://pcmdi.llnl.gov/CMIP6/TermsOfUse for terms of use governing CMIP6 output, including citation requirements and proper acknolwedgement. 
Further information about this data, including some limitations can be found under: https://www.wdc-climate.de/ui/q?query=CMIP6&page=0&rows=15. The data producers and data providers make no warranty, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. All liabilities arising from the supply of the information (including any liability arising in negligence) are excluded to the fullest extent permitted by law.