|
BORA >
University of Bergen >
Research centres and projects >
Nansen Environmental and Remote Sensing Center (NERSC) >
Eprints by Nansen Environmental and Remote Sensing Center (NERSC) >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/627
|
Full metadata record
| DC Field | Value | Language |
|---|
| contributor.author | Gao, Yongqi | - |
| contributor.author | Drange, Helge | - |
| date.accessioned | 2005-03-10T10:35:17Z | - |
| date.available | 2005-03-10T10:35:17Z | - |
| date.issued | 2004-03-04 | - |
| identifier.citation | http://www.iap.ac.cn/publ/aas | en |
| identifier.issn | 0256-1530 | - |
| identifier.uri | http://hdl.handle.net/1956/627 | - |
| description.abstract | The Miami Isopycnic Coordinate Ocean Model (MICOM) is used to investigate the effect of diapycnal
mixing on the oceanic uptake of CFC-11 and the ventilation of the surface waters in the Southern Ocean
(south of 45S). Three model experiments are performed: one with a diapycnal mixing coecient
Kd (m2 s-1) of 2 • 10-7/N (Expt. 1), one with Kd = 0 (Expt. 2), and one with Kd = 5 • 10-8/N
(Expt. 3), N (s-1) is the Brunt-V¨ais¨al¨a frequency. The model simulations indicate that the observed
vertical distribution of CFC-11 along 88W (prime meridian at 0E) in the Southern Ocean is caused by
local ventilation of the surface waters and westward-directed (eastward-directed) isopycnic transport and
mixing from deeply ventilated waters in the Weddell Sea region. It is found that at the end of 1997, the
simulated net ocean uptake of CFC-11 in Expt. 2 is 25% below that of Expt. 1. The decreased uptake of
CFC-11 in the Southern Ocean accounts for 80% of this di erence. Furthermore, Expts. 2 and 3 yield far
more realistic vertical distributions of the ventilated CFC-waters than Expt. 1. The experiments clearly
highlight the sensitivity of the Southern Ocean surface water ventilation to the distribution and thickness
of the simulated mixed layer. It is argued that inclusion of CFCs in coupled climate models could be used
as a test-bed for evaluating the decadal-scale ocean uptake of heat and CO2. | en |
| format.extent | 1771497 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | - |
| publisher | Science Press | en |
| relation.ispartofseries | Advances in Atmospheric Sciences;21(5) | - |
| subject | chlorofluorocarbons | en |
| subject | ocean modelling | en |
| title | The Effect of Diapycnal Mixing on the Ventilation and CFC-11 Uptake in the Southern Ocean | en |
| type | Article | en |
| Appears in Collections: | Eprints by Nansen Environmental and Remote Sensing Center (NERSC)
|
Files in This Item:
| File |
Size | Format |
|---|
| gao_drange_aas_2004.pdf | 1729Kb | Adobe PDF | View/Open |
|
Show simple item record
All items in BORA are protected by copyright, with all rights reserved.
|
