Changes between Version 18 and Version 19 of 2009WP/2009Stream3
- Timestamp:
- 2009-10-20T15:50:05+02:00 (14 years ago)
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2009WP/2009Stream3
v18 v19 54 54 === S3.2-b — Revisit of mass and salt fluxes between ice, ocean and air === 55 55 '''Status :''' on going work (NEMO-Southampton). [[BR]] 56 As a consequence of the embedding of sea-ice into the ocean (see S3.2-c), the total mass of salt of the combined sea-ice/ocean system is 57 conserved by removing a volume of water from the ocean when ice forms or adding a volume of water when it melts. When ice forms, salt contained 58 in the water is returned to the ocean, less the salt retained in the ice itself. When ice melts, the salt contained is added back to the ocean.[[BR]] 56 59 57 60 === S3.2-c — Embedding sea-ice inside the ocean === 58 61 '''Status :''' on going work (NEMO-Southampton). [[BR]] 62 To improve the coupling between the sea-ice and ocean models, we embed the sea-ice into the ocean by changing the volume of the ocean and 63 depressing the ocean interface by a depth equal to the mean ice draft. The latter is calculated as the water equivalent of the total ice and snow mass in the 64 model grid box using in-situ local densities of seawater. The pressure gradient that takes into account the total weight of sea ice and snow in the top 65 model grid box is added to the ocean momentum budget. The vertical coordinate is redefined for the whole water column.[[BR]] 66 The above scheme has been implemented and tested in a 100-year long integration of an ORCA2-LIM2 configuration using both linear and non-linear 67 free surface options. It has also been tested for short runs in the ORCA2-LIM3 configurations. A longer run in ORCA2-LIM3 will take place early in 2010 68 and the code committed for the NEMO 3.3 release. 59 69 60 70 === S3.2-d — New advection schemes ===