| Zhang Huai,Sun Fu. 1996. Dynamics analysis for flux of carbon dioxide across seasurface. Acta Oceanologica Sinica, (4):447－455 |
| Dynamics analysis for flux of carbon dioxide across seasurface |
| Dynamics analysis for flux of carbon dioxide across seasurface |
| Received:November 03, 1995 Revised:May 26, 1996 |
| DOI： |
| Key words:Friction velocity diffusivity solubility resistivity |
| 中文关键词: Friction velocity diffusivity solubility resistivity |
| 基金项目:This study was supported by the National Natural Science Foundation of China. |
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| Abstract: |
| The CO2 exchange between atmosphere and seawater has been discussed. The physical process of exchange at seasurface is related closely with the atmospheric forcing. The result of a dynamics analysis of the CO2 flux actvas the seasurface, and a computed example over the shelf area of the East China See are reported. The analysis and calculation show that the CO2 vertical flux at seawater is mainly dependent on the CO2 concentration difference between seawater and atmosphere. Its exchange velocity is affected by the friction velocity, solubility and resistivity. The agreement between this exchange velocity and recent wind tunnel experimental results is good with wind speed over the range 4-10 m/s. This flux can increase very fast with the increase of wind speed, but very small with the increase of temperature. During the three cruise expeditions in October 1993, and April and October 1994, the CO2 vertical flux at eeasurface was directed downward over the shelf area of the East China Sea. Because the CO2 partial pressure difference between seawater and atmosphere was a negative value, the flux value was -45.5 μg/(m2·h) in average. |
| 中文摘要: |
| The CO2 exchange between atmosphere and seawater has been discussed. The physical process of exchange at seasurface is related closely with the atmospheric forcing. The result of a dynamics analysis of the CO2 flux actvas the seasurface, and a computed example over the shelf area of the East China See are reported. The analysis and calculation show that the CO2 vertical flux at seawater is mainly dependent on the CO2 concentration difference between seawater and atmosphere. Its exchange velocity is affected by the friction velocity, solubility and resistivity. The agreement between this exchange velocity and recent wind tunnel experimental results is good with wind speed over the range 4-10 m/s. This flux can increase very fast with the increase of wind speed, but very small with the increase of temperature. During the three cruise expeditions in October 1993, and April and October 1994, the CO2 vertical flux at eeasurface was directed downward over the shelf area of the East China Sea. Because the CO2 partial pressure difference between seawater and atmosphere was a negative value, the flux value was -45.5 μg/(m2·h) in average. |
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