Derived winter Arctic sea ice thickness estimates
Monthly gridded winter Arctic sea ice thickness data using snow loading from the NASA Eulerian Snow On Sea Ice Model (NESOSIM) as first described in Petty et al., (2020) are also hosted at the NSIDC (https://nsidc.org/data/IS2SITMOGR4).
Along track (ATL10 segment resolution and 10 km means) are still in the process of being hosted on the NSIDC. A link will be provided here when available but preliminary data are freely available from Dr. Alek Petty (alek.a.petty@nasa.gov) in the interim.
Ancillary data
Mean Sea Surface (MSS) Grids
ATL07/10 sea ice data are referenced relative to a mean sea surface (MSS), as described in the Sea Ice Products ATBD (Kwok et al., 2021, https://doi.org/). The MSS is derived from CryoSat-2 sea surface height retrievals during 2011-2015 (Kwok and Morison, 2015) with gaps and lower-latitude ice marginal regions filled using the DTU13 global high resolution MSS (Andersen et al., 2015), which is based on multi-mission satellite altimetry from 10 different satellites over 20 years (1993-2012). The composite data are smoothed using a 25-km Gaussian kernel after a reference ellipsoid bias correction (WGS-84 for CryoSat-2 and Topex/Poseidon for DTU13). The MSS is in a mean tide system. Heights are above WGS-84 reference ellipsoid. The raw MSS data (Arctic and Antarctic, 2.5 km x 2.5 km grid) have now been made available on Zenodo: https://doi.org/10.5281/zenodo.4294047.
References
Andersen O., Knudsen P., Stenseng L., 2015, The DTU13 MSS (Mean Sea Surface) and MDT (Mean Dynamic Topography) from 20 Years of Satellite Altimetry. In: Jin S., Barzaghi R. (eds) IGFS 2014. International Association of Geodesy Symposia, vol 144. Springer, Cham., doi:10.1007/1345_2015_182
Kwok, R., Petty, A., Wimert, J., Bagnardi, M., Cunningham, G., Hancock, D., Ivanoff, A., and Kurtz, N, (2021), Ice, Cloud, and Land Elevation Satellite-2 Project: Algorithm Theoretical Basis Document (ATBD) for Sea Ice Products, Release 005, doi:10.5067/189WL8W8WRH8
Kwok, R., and Morison, J. (2016), Sea surface height and dynamic topography of the ice-covered oceans from CryoSat-2: 2011–2014, Journal of Geophysical Research: Oceans, 121, 674– 692, doi:10.1002/2015JC011357.
Petty, A. A., N. T. Kurtz, R. Kwok, T. Markus, T. A. Neumann (2020), Winter Arctic sea ice thickness from ICESat‐2 freeboards, Journal of Geophysical Research: Oceans, 125, e2019JC015764. doi:10.1029/2019JC015764
