Assimilation of sea-ice concentration in a global climate model – physical and statistical aspects [PDF]
Ocean Science, 2013 We investigate the initialisation of Northern Hemisphere sea ice in the global climate model ECHAM5/MPI-OM by assimilating sea-ice concentration data. The analysis updates for concentration are given by Newtonian relaxation, and we discuss different ways
S. Tietsche +3 more
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Impact assessment of snow thickness, sea ice density and water density in CryoSat-2-derived sea ice thickness [PDF]
The CryosphereSea ice thickness is an essential climate variable, which is often derived from satellite altimetry freeboard estimates, e.g., by CryoSat-2. In order to convert freeboard to sea ice thickness, assumptions are needed for snow thickness, snow density, sea ...
I. Sievers +2 more
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Remapping the thickness distribution in sea ice models [PDF]
Journal of Geophysical Research: Oceans, 2001 In sea ice models with multiple thickness categories the ice thickness distribution evolves in time. The evolution of the thickness distribution as ice grows and melts is analogous to one‐dimensional fluid transport and can be treated by similar numerical methods. One such method, remapping, is applied here.
William H. Lipscomb
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ICESat measurements of sea ice freeboard and estimates of sea ice thickness in the Weddell Sea [PDF]
Journal of Geophysical Research: Oceans, 2008 Sea ice freeboard heights in the Weddell Sea of Antarctica are derived from the Ice, Cloud, and Land Elevation Satellite (ICESat) laser altimeter measurements, which have a unique range precision to flat surfaces of 2 cm within 70 m footprints spaced at 172 m along track. Although elevations of flat surfaces can be obtained to an accuracy of ∼10 cm (1σ)
H. Jay Zwally +3 more
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A Thickness and Enthalpy Distribution Sea-Ice Model [PDF]
Journal of Physical Oceanography, 2001 Abstract The theory of sea ice thickness distribution developed by Thorndike et al. has been extended to include sea ice enthalpy distribution. The extended theory conserves both ice mass and thermal energy, in the form of the heat stored in the ice, by jointly solving a thickness-distribution equation and an enthalpy-distribution equation.
Jinlun Zhang, Drew Rothrock
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Relating the Age of Arctic Sea Ice to its Thickness, as Measured during NASA’s ICESat and IceBridge Campaigns [PDF]
Remote Sensing, 2016 Recent satellite observations yield estimates of the distribution of sea ice thickness across the entire Arctic Ocean. While these sensors were only placed in operation within the last few years, information from other sensors may assist us with ...
Mark A. Tschudi +2 more
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The sub-ice platelet layer and its influence on freeboard to thickness conversion of Antarctic sea ice [PDF]
The Cryosphere, 2014 This is an investigation to quantify the influence of the sub-ice platelet layer on satellite measurements of total freeboard and their conversion to thickness of Antarctic sea ice. The sub-ice platelet layer forms as a result of the seaward advection of
D. Price +5 more
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Near-real-time Arctic sea ice thickness and volume from CryoSat-2 [PDF]
The Cryosphere, 2016 Timely observations of sea ice thickness help us to understand the Arctic climate, and have the potential to support seasonal forecasts and operational activities in the polar regions.
R. L. Tilling, A. Ridout, A. Shepherd
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A weekly Arctic sea-ice thickness data record from merged CryoSat-2 and SMOS satellite data [PDF]
The Cryosphere, 2017 Sea-ice thickness on a global scale is derived from different satellite sensors using independent retrieval methods. Due to the sensor and orbit characteristics, such satellite retrievals differ in spatial and temporal resolution as well as in the ...
R. Ricker +7 more
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Impact of assimilating sea ice concentration, sea ice thickness and snow depth in a coupled ocean–sea ice modelling system [PDF]
The Cryosphere, 2019 The accuracy of the initial state is very important for the quality of a forecast, and data assimilation is crucial for obtaining the best-possible initial state.
S. Fritzner +4 more
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