The sensitivity of a thermodynamic sea ice model to changes in surface albedo parameterization

Shine, Keith P.; Henderson‐Sellers, A.

doi:10.1029/jd090id01p02243

Cited by 110 publications

(57 citation statements)

References 26 publications

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“…This snow and the frozen seawater form then a new layer (snow ice), implying in the model an increase in sea ice thickness (Fichefet and Morales Maqueda, 1997). The parameterization of the surface albedo is taken from Shine and Henderson-Sellers (1985), with corrections for clear and overcast conditions as recommended by Greenfell and Perovich (1984). This albedo formulation takes into consideration the state of the surface (frozen or melting) and the thickness of the snow and ice covers.…”

Section: Clio: the Sea-ice And Ocean Componentmentioning

confidence: 99%

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

et al. 2010

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Abstract. The main characteristics of the new version 1.2 of the three-dimensional Earth system model of intermediate complexity LOVECLIM are briefly described. LOVE-CLIM 1.2 includes representations of the atmosphere, the ocean and sea ice, the land surface (including vegetation), the ice sheets, the icebergs and the carbon cycle. The atmospheric component is ECBilt2, a T21, 3-level quasigeostrophic model. The ocean component is CLIO3, which consists of an ocean general circulation model coupled to a comprehensive thermodynamic-dynamic sea-ice model. Its horizontal resolution is of 3 • by 3 • , and there are 20 levels in the ocean. ECBilt-CLIO is coupled to VECODE, a vegetation model that simulates the dynamics of two main terrestrial plant functional types, trees and grasses, as well as desert. VECODE also simulates the evolution of the carbon cycle over land while the ocean carbon cycle is represented by LOCH, a comprehensive model that takes into acCorrespondence to: H. Goosse (hugues.goosse@uclouvain.be) count both the solubility and biological pumps. The ice sheet component AGISM is made up of a three-dimensional thermomechanical model of the ice sheet flow, a visco-elastic bedrock model and a model of the mass balance at the iceatmosphere and ice-ocean interfaces. For both the Greenland and Antarctic ice sheets, calculations are made on a 10 km by 10 km resolution grid with 31 sigma levels. LOVECLIM1.2 reproduces well the major characteristics of the observed climate both for present-day conditions and for key past periods such as the last millennium, the mid-Holocene and the Last Glacial Maximum. However, despite some improvements compared to earlier versions, some biases are still present in the model. The most serious ones are mainly located at low latitudes with an overestimation of the temperature there, a too symmetric distribution of precipitation between the two hemispheres, and an overestimation of precipitation and vegetation cover in the subtropics. In addition, the atmospheric circulation is too weak. The model also tends to underestimate the surface temperature changes (mainly at low latitudes) and to overestimate the ocean heat uptake observed over the last decades.

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Section: Clio: the Sea-ice And Ocean Componentmentioning

confidence: 99%

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

et al. 2010

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“…The effect of sub-grid-scale snow and ice thickness distributions is implicitly parameterised by enhancing the conduction of heat through the ice and by melting the ice laterally to account for thin ice melting. The surface albedo depends on the state of the surface (frozen or melting), snow depth and ice thickness following Shine and Henderson-Sellers (1985).…”

Section: Nemo Sea-ice Components Lim2 and Lim3mentioning

confidence: 99%

Comparing sea ice, hydrography and circulation between NEMO3.6 LIM3 and LIM2

et al. 2017

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Abstract. A set of hindcast simulations with the new version 3.6 of the Nucleus for European Modelling of the Ocean (NEMO) ocean-ice model in the ORCA1 configuration and forced by the DRAKKAR Forcing Set version 5.2 (DFS5.2) atmospheric data was performed from 1958 to 2012. Simulations differed in their sea-ice component: the old standard version Louvain-la-Neuve Sea Ice Model (LIM2) and its successor LIM3. Main differences between these sea-ice models are the parameterisations of sub-grid-scale sea-ice thickness distribution, ice deformation, thermodynamic processes, and sea-ice salinity. Our main objective was to analyse the response of the ocean-ice system sensitivity to the change in sea-ice physics. Additional sensitivity simulations were carried out for the attribution of observed differences between the two main simulations.In the Arctic, NEMO-LIM3 compares better with observations by realistically reproducing the sea-ice extent decline during the last few decades due to its multi-category sea-ice thickness. In the Antarctic, NEMO-LIM3 more realistically simulates the seasonal evolution of sea-ice extent than NEMO-LIM2. In terms of oceanic properties, improvements are not as evident, although NEMO-LIM3 reproduces a more realistic hydrography in the Labrador Sea and in the Arctic Ocean, including a reduced cold temperature bias of the Arctic Intermediate Water at 250 m. In the extra-polar regions, the oceanographic conditions of the two NEMO-LIM versions remain relatively similar, although they slowly drift apart over decades. This drift is probably due to a stronger deep water formation around Antarctica in LIM3.

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“…The solar radiation flux penetrating down to the ice base is sent to the ocean. The surface albedo is a function of the ice surface temperature, ice thickness, snow depth and cloudiness (Shine and Henderson-Sellers, 1985).…”

Section: Energymentioning

confidence: 99%

The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities

et al. 2015

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Abstract. The new 3.6 version of the Louvain-la-Neuve sea ice model (LIM) is presented, as integrated in the most recent stable release of Nucleus for European Modelling of the Ocean (NEMO) (3.6). The release will be used for the next Climate Model Inter-comparison Project (CMIP6). Developments focussed around three axes: improvements of robustness, versatility and sophistication of the code, which involved numerous changes. Robustness was improved by enforcing exact conservation through the inspection of the different processes driving the air-ice-ocean exchanges of heat, mass and salt. Versatility was enhanced by implementing lateral boundary conditions for sea ice and more flexible ice thickness categories. The latter includes a more practical computation of category boundaries, parameterizations to use LIM3.6 with a single ice category and a flux redistributor for coupling with atmospheric models that cannot handle multiple sub-grid fluxes. Sophistication was upgraded by including the effect of ice and snow weight on the sea surface. We illustrate some of the new capabilities of the code in two standard simulations. One is an ORCA2-LIM3 global simulation at a nominal 2 • resolution, forced by reference atmospheric climatologies. The other one is a regional simulation at 2 km resolution around the Svalbard Archipelago in the Arctic Ocean, with open boundaries and tides. We show that the LIM3.6 forms a solid and flexible base for future scientific studies and model developments.

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The sensitivity of a thermodynamic sea ice model to changes in surface albedo parameterization

Cited by 110 publications

References 26 publications

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

Comparing sea ice, hydrography and circulation between NEMO3.6 LIM3 and LIM2

The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities

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