Duncan, K., Farrell, S. L., Connor, L. N., Richter-Menge, J., Hutchings, J. K., and Dominguez, R.: High-resolution airborne observations of sea-ice pressure ridge sail height, Ann. Glaciol., 59, 137–147,
https://doi.org/10.1017/aog.2018.2, 2018.
a
Farrell, S., Duncan, K., Buckley, E., Richter-Menge, J., and Li, R.: Mapping
Sea Ice Surface Topography in High Fidelity with ICESat-2, Geophy. Res.
Lett., 47, e2020GL090708,
https://doi.org/10.1029/2020GL090708, 2020.
a
Farrell, S. L., Brunt, K. M., Ruth, J. M., Kuhn, J. M., Connor, L. N., and
Walsh, K. M.: Sea-ice freeboard retrieval using digital photon counting laser
altimetry, Ann. Glaciol., 56, 167–174,
https://doi.org/10.3189/2015AoG69A686,
2015.
a
Fredensborg Hansen, R. M.: reneefredensborg/DIR-from-IS2: Estimating elevation anomalies (ridge sails) and degree of ice ridging (DIR) from ICESat-2 (IS2) (Version v1.1), Zenodo,
https://doi.org/10.5281/zenodo.4636435, 2021.
a
Gegiuc, A., Similä, M., Karvonen, J., Lensu, M., Mäkynen, M., and Vainio, J.: Estimation of degree of sea ice ridging based on dual-polarized C-band SAR data, The Cryosphere, 12, 343–364,
https://doi.org/10.5194/tc-12-343-2018, 2018.
a,
b,
c,
d,
e,
f,
g,
h,
i,
j
Goerlandt, F., Goite, H., Banda, O. A. V., Höglund, A., Ahonen-Rainio, P., and Lensu, M.: An analysis of wintertime navigational accidents in the Northern Baltic Sea, Safety Science, 92, 66–84,
https://doi.org/10.1016/j.ssci.2016.09.011, 2017.
a,
b
HELCOM: HELCOM Map And Data Service, available at:
http://maps.helcom.fi/website/mapservice/ (last access: 21 October 2020), 2021. a
Horvat, C., Blanchard-Wrigglesworth, E., and Petty, A.: Observing Waves in Sea Ice With ICESat-2, Geophys. Res. Lett., 47, e2020GL087629,
https://doi.org/10.1029/2020GL087629, 2020.
a
IMO: International code for ships operating in polar waters (Polar Code), Tech. rep., Internatinal Maritime Organisation (IMO), Marine Environment Protection Committee (MEPC), available at:
http://www.imo.org/en/MediaCentre/HotTopics/polar/Documents/POLAR CODE TEXT AS ADOPTED.pdf, last access: 17 August 2020. a
Karvonen, J., Heiler, I., Seniä, A., and Hackett, B.: Product User Manual:
For Baltic Sea – Sea Ice Observations
SEAICE_BAL_SEAICE_L4_NRT_OBSERVATIONS_011_004/011, copernicus Marine
Service, available at:
https://resources.marine.copernicus.eu/documents/PUM/CMEMS-SI-PUM-011-004-011.pdf
(last access: 12 March 2021), 2020. a
Klotz, B. W., Neuenschwander, A., and Magruder, L. A.: High-Resolution Ocean
Wave and Wind Characteristics Determined by the ICESat-2 Land Surface
Algorithm, Geophys. Res. Lett., 47, e2019GL085907,
https://doi.org/10.1029/2019GL085907,
2020.
a
Kovacs, A., Weeks, W., Ackley, S., and Hibler, W.: Structure of a Multi-Year
Pressure Ridge, Arctic, 26, 22–31,
https://doi.org/10.14430/arctic2893, 1973.
a
Kwok, R., Kacimi, S., Markus, T., Kurtz, N. T., Studinger, M., Sonntag, J. G., Manizade, S. S., Boisvert, L. N., and Harbeck, J. P.: ICESat-2 Surface Height and Sea Ice Freeboard Assessed with ATM Lidar Acquisitions From Operation IceBridge, Geophys. Res. Lett., 46, 11228–11236,
https://doi.org/10.1029/2019GL084976, 2019a.
a,
b
Kwok, R., Markus, T., Kurtz, N. T., Neumann, T. A., Farrell, S. L., Cunningham, C. F., Hancock, D. W., Ivanoff, A., and Wimert, J. T.: Surface Height and Sea Ice Freeboard of the Arctic Ocean from ICESat-2: Characteristics and Early Results, J. Geophys. Res.-Oceans, 124, 6942–6959,
https://doi.org/10.1029/2019JC015486, 2019b.
a,
b
Kwok, R., Petty, A. A., Bagnardi, M., Kurtz, N. T., Cunningham, G. F., Ivanoff, A., and Kacimi, S.: Refining the sea surface identification approach for determining freeboards in the ICESat-2 sea ice products, The Cryosphere, 15, 821–833,
https://doi.org/10.5194/tc-15-821-2021, 2021.
a,
b
Lewis, J., Leppäranta, M., and Granberg, H.: Statistical properties of sea ice surface topography in the Baltic Sea, Tellus A, 45, 127–142, 1993.
a,
b
Leys, C., Ley, C., Klein, O., Bernard, P., and Licata, L.: Detecting outliers: Do not use standard deviation around the mean, use absolute deviation around the median, J. Exp. Soc. Psychol., 49, 764–766,
https://doi.org/10.1016/j.jesp.2013.03.013, 2013.
a
Markus, T., Neumann, T., Martino, A., Abdalati, W., Brunt, K., Csatho, B.,
Farrell, S., Fricker, H., Gardner, A., Harding, D., Jasinksi, M., Kwok, R.,
Magruder, L., Lubin, D., Lutchke, S., Morison, J., Nelson, R.,
Neuenschwander, A., Palm, S., Popescu, S., Schum, C., Schutz, B. E., Smith,
B., Yang, Y., and Zwally, J.: The Ice, Cloud and land Elevation Satellite-2
(ICESat-2): Science requirements, concept and implementation, Remote Sens. Environ., 190, 260–273,
https://doi.org/10.1016/j.rse.2016.12.029, 2017.
a,
b
Melia, N., Haines, K., and Hawkins, E.: Sea ice decline and 21st century
trans-Arctic shipping routes, Geophys. Res. Lett., 43, 9720–9728,
https://doi.org/10.1002/2016GL069315, 2016.
a
NASA EarthData: ASF Data Search, available at:
https://search.asf.alaska.edu/#/, last access: 18 February 2021. a
Neumann, T., Brenner, A., Hancock, D., Lutchke, S., Lee, J., Robbins, J.,
Harbeck, K., Saba, J., Brunt, K., Gibbons, A., Saba, J., Brunt, K., and ICESat-2 Science Team: ATLAS/ICESat-2
L2A Global Geolocated Photon Data, Version 2, NSIDC, National Snow and Ice Data Center Boulder, CO, USA,
https://doi.org/10.5067/ATLAS/ATL03.002, 2019a.
a,
b,
c
Neumann, T., Martino, A. J., Markus, T., Bae, S., Bock, M. R., Brenner,
A. C., Brunt, K. M., Cavanaugh, J., Fernandes, S. T., Hancock, D. W.,
Harbeck, K., Lee, J., Kurtz, N. T., Luers, P. J., Lutchke, S. B., Magruder,
L., Pennington, T. A., Ramos-Izquierdo, L., Rebold, T., Skoog, J., and
Thomas, T. C.: The Ice, Cloud and Land Elevation Satellite – 2 mission: A
global geolocated photon product derived from the Advanced Topographic Laser
Altimeter System, Remote Sens. Environ., 233, 111325,
https://doi.org/10.1016/j.rse.2019.111325, 2019b.
a,
b,
c,
d
Neumann, T., Brenner, A., Hancock, D., Robbins, J., Saba, J., Harbeck, K.,
Gibbons, A., Lee, J., Lutchke, S., and Rebold, T.: Algorithm Theoretical
Basis Document (ATBD) for Global Geolocated Photons (ATL03), Goddard Space Flight Center, Release 003,
Tech. rep.,
https://doi.org/10.5067/ESL18THQ8RNT, 2020.
a,
b,
c
Petty, A. A., Bagnardi, M., Kurtz, N. T., Tilling, R., Fons, S., Armitage, T., Horvat, C., and Kwok, R.: Assessment of ICESat-2 Sea Ice Surface
Classification with Sentinel-2 Imagery: Implications for Freeboard and New
Estimates of Lead and Floe Geometry, Earth Space Sci., 8,
e2020EA001491,
https://doi.org/10.1029/2020EA001491, 2021.
a
Ronkainen, I., Lehtiranta, J., Lensu, M., Rinne, E., Haapala, J., and Haas, C.: Interannual sea ice thickness variability in the Bay of Bothnia, The Cryosphere, 12, 3459–3476,
https://doi.org/10.5194/tc-12-3459-2018, 2018.
a,
b,
c,
d,
e,
f
Schweiger, A. J.: Changes in seasonal cloud cover over the Arctic seas from
satellite and surface observations, Geophys. Res. Lett., 31, L12207,
https://doi.org/10.1029/2004GL020067, 2004.
a
Stasolla, K. and Neyt, X.: An Operation Tool for the Automatic
Detection and Removal of Border Noise in Sentinel-1 GRD
Products, Sensors, 18, 3454,
https://doi.org/10.3390/s18103454, 2018.
a
Tilling, R., Kurtz, N. T., Bagnardi, M., Petty, A. A., and Kwok, R.: Detection of Melt Ponds on Arctic Summer Sea Ice From ICESat-2, Geophys. Res. Lett., 47, e2020GL090644,
https://doi.org/10.1029/2020GL090644, 2020.
a
WMO: Sea-Ice Information Services in the World, vol. 574, 2010 edn., World
Meteorological Organisation (WMO), 2010. a
