Some of the key public climate datasets I have developed and continue to maintain.
ICESat-2 L4 monthly gridded winter Arctic sea ice thickness (IS2SITMOGR4)
This dataset reports monthly, gridded (25 km x 25 km) winter sea ice thickness across the Arctic Ocean. Currently at Version 3, Version 1 and 2 deprecated but still available on the NSIDC,
Data: https://nsidc.org/data/IS2SITMOGR4
Citation: Petty, A. A., N. Kurtz, R. Kwok, T. Markus, T. A. Neumann and N. Keeney. 2023. ICESat-2 L4 Monthly Gridded Sea Ice Thickness, Version 3. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: 10.5067/ZCSU8Y5U1BQW.
Data also hosted unofficially on AWS to enable more rapid cloud-native analysis:
These data are also described and analyzed in an online Jupyter Book: https://www.icesat-2-sea-ice-state.info
Data are also featured in this NASA/ESA Earth Observing Dashboard. I did not choose the projection..!
ICESat-2 L4 monthly gridded summer Arctic sea ice thickness (IS2SITMOGR4S)
Associated paper currently in review, dataset should be considered preliminary/experimental.
Data: https://zenodo.org/records/15375596.
Citation: Petty, A. (2025). Monthly gridded summer Arctic sea ice thickness from ICESat-2, v1 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.15375597
ICESat-2 L4 along-track Arctic sea ice thickness (IS2SITDAT4)
This dataset reports daily, along-track winter sea ice thickness across the Arctic Ocean at the raw ATL10 segment scale (around 20 m) and also 10 km means.
Data: https://nsidc.org/data/IS2SITDAT4
Citation: Petty, A. A., N. T. Kurtz, R. Kwok, T. Markus, and T. A. Neumann. 2022. ICESat-2 L4 Along-Track Sea Ice Thickness, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: 10.5067/JTI5YG3S6VAJ.
ICESat L4 Seasonal Gridded Sea Ice Thickness, Version 1 (ISSITGR4)
This dataset reports seasonally, gridded (25 km x 25 km) winter sea ice thickness across the Arctic Ocean during the ICESat campaign periods. NESOSIM v1.1 snow loading is used for processing, as in IS2SITMOGR4 (V2).
Data: https://nsidc.org/data/ISSITGR4
Citation: Petty, A. A., N. Kurtz, 2023. ICESat L4 Seasonal Gridded Sea Ice Thickness, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi:10.5067/1S5M59IQ0OK3.
ATLAS/ICESat-2 L3A ATL07 Sea Ice Height (ATL07)
The data set (ATL07) contains along-track heights for sea ice and open water leads (at varying length scales) relative to the WGS84 ellipsoid (ITRF2014 reference frame) after adjustment for geoidal and tidal variations, and inverted barometer effects.
Data: https://nsidc.org/data/ATL07/
Citation: Kwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2023). ATLAS/ICESat-2 L3A Sea Ice Height. (ATL07, Version 6). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL07.006.
ATLAS/ICESat-2 L3A ATL07 Sea Ice Freeboard (ATL10)
This data set (ATL10) contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided.
Data: https://nsidc.org/data/ATL10/
Citation: Kwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2023). ATLAS/ICESat-2 L3A Sea Ice Freeboard. (ATL10, Version 6). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL10.006.
ATLAS/ICESat-2 L3B ATL20 Daily and Monthly Gridded Sea Ice Freeboard (ATL20)
This dataset (ATL20) contains daily and monthly gridded (25 km x 25 km) estimates of sea ice freeboard, derived from along-track freeboard estimates in the ATLAS/ICESat-2 L3A Sea Ice Freeboard product (ATL10).
Data: https://nsidc.org/data/ATL20/
Citation: Petty, A. A., R. Kwok, M. Bagnardi, A. Ivanoff, N. Kurtz, J. Lee, J. Wimert, and D. Hancock. 2023. ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard, Version 4. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi:10.5067/ATLAS/ATL20.004.
ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly (ATL21)
This dataset contains daily and monthly gridded polar sea surface height (SSH) anomalies, derived from the along-track ATLAS/ICESat-2 L3A Sea Ice Height product (ATL10, V6).
Data: https://nsidc.org/data/ATL21/
Citation: Petty, A. A., R. Kwok, M. Bagnardi, N. Kurtz, J. Wimert, J. Lee, and D. Hancock. 2023. ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly, Version 3. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: 10.5067/ATLAS/ATL21.003.
ATLAS/ICESat-2 L3A Sea Ice Height Quick Look (ATL07QL)
ATL07QL is the quick look version of ATL07 and is based on the same algorithms that generate the ATL07 final data products.
Data: https://nsidc.org/data/ATL07ql/
Kwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2025). ATLAS/ICESat-2 L3A Sea Ice Height Quick Look. (ATL07QL, Version 7). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL07QL.006.
ATLAS/ICESat-2 L3A Sea Ice Freeboard Quick Look (ATL10QL)
ATL10QL is the quick look version of ATL10. Once final ATL10 files are available the corresponding ATL10QL files will be removed.
Data: https://nsidc.org/data/ATL10ql/
Citation: Kwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2023). ATLAS/ICESat-2 L3A Sea Ice Freeboard Quick Look. (ATL10QL, Version 6). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL10QL.006.
NASA Eulerian Snow On Sea Ice Model (NESOSIM) version 1.1 (1980-2024)
This dataset contains Winter Arctic sea ice snow depth and density across the Arctic Ocean and peripheral seas on a North Polar Stereographic projection (EPSG: 3413).
Data archive: https://doi.org/10.5281/zenodo.5164313.
Code archive: https://doi.org/10.5281/zenodo.6342069.
NESOSIM upgrade reference: Petty A. A., N. Keeney, A. Cabaj, P. Kushner, M. Bagnardi (2023), Winter Arctic sea ice thickness from ICESat-2: upgrades to freeboard and snow loading estimates and an assessment of the first three winters of data collection, The Cryosphere, 17, 127–156, doi: 10.5194/tc-17-127-2023.
Original paper reference: Petty, A. A., M. Webster, L. N. Boisvert, T. Markus (2018), The NASA Eulerian Snow on Sea Ice Model (NESOSIM) v1.0: Initial model development and analysis, Geosci. Model Dev., doi: 10.5194/gmd-11-4577-2018.
NASA Eulerian Snow On Sea Ice Model (NESOSIM) v1.0 (2000-2015)
This dataset contains the original estimates of winter Arctic sea ice snow depth and density from the NASA Eulerian Snow On Sea Ice Model (NESOSIM) version 1.0.
Data: https://earth.gsfc.nasa.gov/cryo/data/nasa-eulerian-snow-sea-ice-model-nesosim.
Citation: Petty, A. A., M. Webster, L. N. Boisvert, T. Markus (2018), The NASA Eulerian Snow on Sea Ice Model (NESOSIM) v1.0: Initial model development and analysis, Geosci. Model Dev., doi: 10.5194/gmd-11-4577-2018.