Year-round Arctic sea ice thickness from CryoSat-2 Baseline-D Level 1b observations 2010-2020

This dataset presents biweekly gridded sea ice thickness and uncertainty for the Arctic derived from the European Space Agency's satellite CryoSat-2. An associated 'developer's product' also includes intermediate parameters used or output in the sea ice thickness processing chain. Data are provided as biweekly grids with a resolution of 80 km, mapped onto a Northern Polar Stereographic Grid, covering the Arctic region north of 50 degrees latitude, for all months of the year between October 2010 and July 2020.

CryoSat-2 Level 1b Baseline-D observed radar waveforms have been retracked using two different approaches, one for the 'cold season' months of October-April and the second for 'melting season' months of May-September. The cold season retracking algorithm uses a numerical model for the SAR altimeter backscattered echo from snow-covered sea ice presented in Landy et al. (2019), which offers a physical treatment of the effect of ice surface roughness on retracked ice and ocean elevations. The method for optimizing echo model fits to observed CryoSat-2 waveforms, retracking waveforms, classifying returns, and deriving sea ice radar freeboard are detailed in Landy et al. (2020). The melting season retracking algorithm uses the SAMOSA+ analytical echo model with optimization to observed CryoSat-2 waveforms through the SARvatore (SAR Versatile Altimetric Toolkit for Ocean Research and Exploitation) service available through ESA Grid Processing on Demand (GPOD). The method for classifying radar returns and deriving sea ice radar freeboard in the melting season are detailed in Dawson et al. (2022).

The melting season sea ice radar freeboards require a correction for an electromagnetic range bias, as described in Landy et al. (2022). After applying the correction, year-round freeboards are converted to sea ice thickness using auxiliary satellite observations of the sea ice concentration and type, as well as snow depth and density estimates from a Lagrangian snow evolution scheme: SnowModel-LG (Stroeve et al., 2020; Liston et al., 2020). The sea ice thickness uncertainties have been estimated based on methods described in Landy et al. (2022). NetCDF files contain detailed descriptions of each parameter.

Funding was provided by the NERC PRE-MELT grant NE/T000546/1 and the ESA Living Planet Fellowship Arctic-SummIT grant ESA/4000125582/18/I-NS.

Date (Creation): 2022-02-28

Date (Revision): 2022-02-28

Date (Publication): 2022-02-28

Date (released): 2022-02-28

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/d8c66670-57ad-44fc-8fef-942a46734ecb

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01613

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

Unique resource identifier: NE/T000546/1

Codespace: award

Other citation details: Please cite this item as: Landy, J., & Dawson, G. (2022). Year-round Arctic sea ice thickness from CryoSat-2 Baseline-D Level 1b observations 2010-2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/d8c66670-57ad-44fc-8fef-942a46734ecb

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Bristol	Landy, Jack		Author
University of Bristol	Dawson, Geoffrey		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

Theme

Arctic
CryoSat-2
sea ice
sea ice freeboard
sea ice thickness

Place

Arctic Ocean Arctic

GEMET - INSPIRE themes, version 1.0

Oceanographic geographical features

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

Please cite the indicated publications if using this dataset.

Use constraints: Other restrictions

Other constraints: No restrictions apply.

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

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Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

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Codespace: doi

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Codespace: doi

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Unique resource identifier: url

Codespace: url

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Unique resource identifier: url

Codespace: url

Association Type: Larger work citation

Spatial representation type: Text, table

Language: English

Character set: UTF8

Topic category

Climatology, meteorology, atmosphere
Elevation
Geoscientific information
Oceans

Begin date: 2010-10-01

End date: 2020-07-31

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

Distributor

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

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Name	Version
image/tiff
application/x-hdf
application/netcdf

Units of distribution: bytes

Transfer size: 333237453

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Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=d8c66670-57ad-44fc-8fef-942a46734ecb	Get Data

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WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=d8c66670-57ad-44fc-8fef-942a46734ecb	Get Data

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WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=d8c66670-57ad-44fc-8fef-942a46734ecb	Get Data

Hierarchy level: Dataset

Statement: Methodology:

The data is derived from CryoSat-2 Baseline-D Level 1b waveform observations over the Arctic, north of 50 degrees latitude, for 2010 to 2020.

Data collection:

European Space Agency's CryoSat-2.

Data quality:

NetCDF files were produced from the final gridded satellite observations and contain all associated metadata, or details about auxiliary datasets used in the processor. No smoothing or averaging was performed on the 80-km gridded sea ice thickness data. NetCDF files contain detailed descriptions of each derived parameter, both in the main sea ice thickness and developer's products.

Metadata

File identifier: d8c66670-57ad-44fc-8fef-942a46734ecb XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2022-02-28

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

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