碩士 / 國立中央大學 / 水文所 / 97 / In this study, a one-dimensional model based on the Mellor and Yamada level 2.5 turbulence closure model was coupled to a biogeochemical model with carbon cycling to investigate the variation of pCO2 at the South-East Asian Time-series Study (SEATS) Site in the northern South China Sea (SCS) from 1997 to 2003. This study was focused on the biological effect on pCO2 and air-sea exchange of CO2.
The model was initiated by two different initial conditions, one for March and the other for September. Both conditions are taken from averaged ship board measurements of the hydrographic and biogeochemical data, including alkalinity and dissolved inorganic carbon (DIC) data. The alkalinity and DIC concentrations, which are controlled by physical as well as biogeochemical processes, are used to calculate pCO2 values by the subroutine provided by OCMIP. The pCO2 data are used to determine whether the SEATS station is a carbon dioxide source or sink in different seasons..
The modeled sea to air fluxes of CO2 show a seasonal pattern similar to observations but differ somewhat in magnitudes. After calibrating the modeled fluxes with the observed values, we obtain the sea-to-air carbon dioxide flux to be -1.30 molC/m2/yr for winter and 1.21 molC/m2/yr for summer. The entire year average is 0.07 molC/m2/yr, close to Chou’s estimate (Chou, 2005).
Without biology, the sea-to-air carbon dioxide flux will be higher by 0.88 molC/m2/yr in winter and 0.18 molC/m2/yr in summer.
| Identifer | oai:union.ndltd.org:TW/097NCU05761004 |
| Date | January 2009 |
| Creators | Fu-yang Hsieh, 謝馥揚 |
| Contributors | Kon-Kee Liu, 劉康克 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 87 |
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