Geophysical Research Letters
Sea-level rise is an important indicator of ongoing climate change and well observed by satellite altimetry. However, observations from conventional altimetry degrade at the coast where regional sea-level changes can deviate from the open-ocean and impact local communities. With the 2018 launch of the laser altimeter onboard ICESat-2, new high-resolution observations of ice, land, and ocean elevations are available. Here we assess the potential benefits of sea level measured by ICESat-2 by comparing to data from Jason-3 and tide gauges. We find good agreement in the linear rates computed from the independent observations, with an absolute average residual of 3.60 ± 0.03 cm yr−1 between global ICESat-2 and Jason-3 observations at a 1° posting. The recent La Niña is clearly evident in ICESat-2 observations, as well as small-scale features. By demonstrating the quality of the ICESat-2-measured sea level, we provide support for integrating it into the existing suite of sea-level observations.
An edited version of this paper was published by AGU. Copyright 2021 American Geophysical Union.
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Buzzanga, B., Heijkoop, E., Hamlington, B. D., Nerem, R. S., & Gardner, A. (2021) An assessment of regional ICESat-2 sea-level trends. Geophysical Research Letters, Volume 48, Article e2020GL092327. To view the published open abstract, go to https://doi.org/10.1029/2020gl092327.
Article states: "All data used in this study is freely available. ATL12 ICESat-2 data are available at the NSIDC (J. H. Morison, 2020; https://nsidc.org/data/ATL12/versions/3). Jason-3 data are available from NCEI (Lillibridge, 2019; https://www.ncei.noaa.gov/products/jason-satellite-products). Tide gauge data are available from the University of Hawaii Sea Level Center (Caldwell, 2015; https://uhslc.soest.hawaii.edu/datainfo). Water polygons for masking are available from Open Street Maps (OSM 2017; https://osmdata.openstreetmap.de/data/water-polygons.html)."
Original Publication Citation
Buzzanga, B., Heijkoop, E., Hamlington, B. D., Nerem, R. S., & Gardner, A. (2021). An assessment of regional ICESat-2 sea-level trends. Geophysical Research Letters, 48(9), 1-9, Article e2020GL092327. https://doi.org/10.1029/2020gl092327
Buzzanga, Brett; Heijkoop, Eduard; Hamlington, Benjamin D.; Nerem, R. Steven; and Gardner, Alex, "An Assessment of Regional ICESat-2 Sea-Level Trends" (2021). OES Faculty Publications. 417.