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Description

This data set (ATL20) contains daily and monthly gridded estimates of sea ice freeboard, derived from along-track freeboard estimates in the ATLAS/ICESat-2 L3A Sea Ice Freeboard product (ATL10). Data are gridded at 25 km using the SSM/I Polar Stereographic Projection.

Version Description

There were no changes in the ATL20 algorithm for this version. The changes in this version stem from the changes in the underlying ATL10, V5 data. See the corresponding ATL10 landing page for details.

Product Summary

Platforms
ICESat-2
Instruments
ATLAS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
25 Kilometers x 25 Kilometers
Spatial Reference System(s)
Multiple EPSG codes (see User Guide)
Location
GLOBAL OCEAN
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2018-10-14 to 2022-09-30
Temporal Resolution
Varies
Concept ID
C2153577387-NSIDC_CPRD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
3
Published
Science Keywords
Freeboard

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Petty, A., Kwok, R., Bagnardi, M., Ivanoff, A., Kurtz, N., Lee, J., Wimert, J., & Hancock, D. (2021). ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard, Version 3 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL20.003 Date Accessed: 2026-08-05

Documents

Publications Citing This Dataset

Filters
Title Year Author Topic
Assessment of the Ice, Cloud, and Land Elevation Satellite-2 Performance Magruder, Lori A., Neumann, Tom, Kurtz, Nathan, Sutterley, Tyler C., Hancock, David, Vornberger, Patricia, Robbins, John, Smith, Benjamin Glacier Elevation/Ice Sheet Elevation, Freeboard, Sea Ice Elevation, Terrain Elevation, Sea Surface Height
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter Dong, Zhaoqing, Shi, Lijian, Lin, Mingsen, Jia, Yongjun, Zeng, Tao, Wu, Suhui Freeboard, Ice Depth/Thickness, Ice Roughness, Sea Ice Concentration, Snow Density, Snow Depth
ICESat-2 Mission: Contributions of a spaceborne lidar to ocean science Neumann, Thomas, Magruder, Lori, Kurtz, Nathan Sea Ice Elevation, Terrain Elevation, Freeboard, Sea Surface Height, Ice Depth/Thickness, Snow Depth
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