Articles | Volume 18, issue 5
https://doi.org/10.5194/tc-18-2473-2024
https://doi.org/10.5194/tc-18-2473-2024
Research article
 | 
17 May 2024
Research article |  | 17 May 2024

Estimating the uncertainty of sea-ice area and sea-ice extent from satellite retrievals

Andreas Wernecke, Dirk Notz, Stefan Kern, and Thomas Lavergne

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Cited articles

Alekseeva, T., Tikhonov, V., Frolov, S., Repina, I., Raev, M., Sokolova, J., Sharkov, E., Afanasieva, E., and Serovetnikov, S.: Comparison of Arctic Sea Ice concentrations from the NASA team, ASI, and VASIA2 algorithms with summer and winter ship data, Remote Sens.-Basel, 11, 2481, https://doi.org/10.3390/rs11212481, 2019. a, b, c
Andersen, S., Tonboe, R., Kaleschke, L., Heygster, G., and Pedersen, L. T.: Intercomparison of passive microwave sea ice concentration retrievals over the high-concentration Arctic sea ice, J. Geophys. Res.-Oceans, 112, C8004, https://doi.org/10.1029/2006JC003543, 2007. a
Castleman, B. A., Schlegel, N.-J., Caron, L., Larour, E., and Khazendar, A.: Derivation of bedrock topography measurement requirements for the reduction of uncertainty in ice-sheet model projections of Thwaites Glacier, The Cryosphere, 16, 761–778, https://doi.org/10.5194/tc-16-761-2022, 2022. a
Cavalieri, D. J., Parkinson, C. L., Gloersen, P., Comiso, J. C., and Zwally, H. J.: Deriving long-term time series of sea ice cover from satellite passive-microwave multisensor data sets, J. Geophys. Res.-Oceans, 104, 15803–15814, https://doi.org/10.1029/1999JC900081, 1999. a
Comiso, J. C., Meier, W. N., and Gersten, R.: Variability and trends in the Arctic Sea ice cover: Results from different techniques, J. Geophys. Res.-Oceans, 122, 6883–6900, https://doi.org/10.1002/2017JC012768, 2017. a, b, c
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Short summary
The total Arctic sea-ice area (SIA), which is an important climate indicator, is routinely monitored with the help of satellite measurements. Uncertainties in observations of sea-ice concentration (SIC) partly cancel out when summed up to the total SIA, but the degree to which this is happening has been unclear. Here we find that the uncertainty daily SIA estimates, based on uncertainties in SIC, are about 300 000 km2. The 2002 to 2017 September decline in SIA is approx. 105 000 ± 9000 km2 a−1.
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