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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/627
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| Title: | The Effect of Diapycnal Mixing on the Ventilation and CFC-11 Uptake in the Southern Ocean |
| Authors: | Gao, Yongqi
Drange, Helge |
| Keywords: | chlorofluorocarbons
ocean modelling |
| Issue Date: | 4-Mar-2004 |
| Publisher: | Science Press |
| Citation: | http://www.iap.ac.cn/publ/aas |
| Series/Report no.: | Advances in Atmospheric Sciences;21(5) |
| 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. ... |
| URI: | http://hdl.handle.net/1956/627 |
| ISSN: | 0256-1530 |
| Appears in Collections: | Eprints by Nansen Environmental and Remote Sensing Center (NERSC)
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