Types of dataset: Gridded Altimetry Sea Ice product for Envisat and Cryosat-2.

Contents: Gridded Altimetric Sea Ice Thickness, Sea Ice Freeboard, Snow Depth, Snow Density, Sea Ice density, Sea Ice thickness uncertainty, multi year ice fraction for Envisat and Cryosat-2.

Use: Climate, ocean/atmosphere studies, primary production,...

Condition of access: products delivered for any purposes as stated in the licence agreement.

Data access service:  FTP, TDS

Description: The Altimetry Sea Ice product is computed by CTOH and is estimated from the Envisat (2002-2012) and CryoSat-2 (2010-present) ESA satellite missions.

Geographic coverage: 
Arctic: 
65°N < latitude < 88°N for Cryosat-2 and 81.5°N for the other datasets.
Antarctic (soon available): 
88°S for Cryosat-2 and 81.5°S for the other datasets < latitude < 55°S

Format: NetCDF-4 Classic.

Tools:

•  CTOH Altimetry Sea Ice product User Handbook
•  Article in the Newsletter 16

References:

• For Envisat and CryoSat-2 FB and SIT :

- Guerreiro, K., Fleury, S., Zakharova, E., Kouraev, A., Rémy, F., Maisongrande, P., 2017. Comparison of CryoSat-2 and ENVISAT radar freeboard over Arctic sea ice: toward an improved Envisat freeboard retrieval. The Cryosphere 11, 2059–2073. https://doi.org/10.5194/tc-11-2059-2017 

•  For the Snow Depth :                                                                                                   

- Garnier, F., Fleury, S., Garric, G., Bouffard, J., Tsamados, M., Laforge, A., Bocquet, M., Fredensborg Hansen, R. M., and Rémy, F.: Advances in altimetric snow depth estimates using bi-frequency SARAL/CryoSat-2 Ka/Ku measurements, The Cryosphere Discuss. [preprint], https://doi.org/10.5194/tc-2021-79 , in review, 2021.

- Guerreiro, K., Fleury, S., Zakharova, E., Rémy, F., Kouraev, A., 2016. Potential for estimation of snow depth on Arctic sea ice from CryoSat-2 and SARAL/AltiKa missions. Remote Sensing of Environment 186, 339–349. https://doi.org/10.1016/j.rse.2016.07.013 

Citation: Publications should include the following statement in the Acknowledgments:
“The data used in this study (doi 10.6096/CTOH_SEAICE_2019_12) were developed, validated by the CTOH/LEGOS, France and distributed by Aviso+”.