| GAO Zhongyong,CHEN Liqi,GAO Yuan. 2008. Air-sea carbon fluxes and their controlling factors in the Prydz Bay in the Antarctic. Acta Oceanologica Sinica, (3):136－146 |
| Air-sea carbon fluxes and their controlling factors in the Prydz Bay in the Antarctic |
| Air-sea carbon fluxes and their controlling factors in the Prydz Bay in the Antarctic |
| Received:July 13, 2007 Revised:January 06, 2008 |
| DOI： |
| Key words:Prydz Bay carbon flux carbon dioxide controlling factors |
| 中文关键词: Prydz Bay carbon flux carbon dioxide controlling factors |
| 基金项目:The National Natural Science Foundation of China under contract Nos40276001,40406014,40676062 and 40531007;the Polar StrategyFoundation of under contract No.20070224;the National Key Technology Reaserch and Development Program for the 11th Five-year Plan of China under contract No.2006BAB18B04;the Fujian Province Youth Technological Creation of China under contract No.2004J056;Fujian Province Natural Science Foundation of China under contract No.Z0513027 and TIOSOA Foundation. |
| Author Name | Affiliation | E-mail | | GAO Zhongyong | Key Laboratory of Global Change and Marine Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China | zgao@263.net | | CHEN Liqi | Key Laboratory of Global Change and Marine Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
Chinese Arctic and Antarctic Administration, Beijing 100860, China | | | GAO Yuan | Key Laboratory of Global Change and Marine Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ USA | |
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| Abstract: |
| The Prydz Bay in the Antarctic is an important area in the Southern Ocean due to its unique geographic feature.It plays an important role in the carbon cycle in the Southern Ocean.To investigate the distributions of carbon dioxide in the atmosphere and surface seawater and its air-sea exchange rates in this region, the Chinese National Antarctic Research Expedition (CHINARE) had set up several sections in the Prydz Bay.Here we present the results from the CHINARE-XVI cruises were presented onboard R/V Xuelong from November 1999 to April 2000 and the main driving forces were discussed controlling the distributions of partial pressure of carbon dioxide.According to the partial pressure of carbon dioxide distributions, the Prydz Bay can be divided into the inside and outside regions.The partial pressure of carbon dioxide was low in the inside region but higher in the outside region during the measurement period.This distribution had a good negative correlation with the concentrations of chlorophylla in general, suggesting that the partial pressure of carbon dioxide was substantially affected by biological production.The results also indicate that the biological production is most likely the main driving force in the marginal ice zone in the Southern Ocean in summer.However, in the Antarctic divergence sector of the Prydz Bay (about 64°S), the hydrological processes become the controlling factor as the sea surface partial pressure of carbon dioxide is much higher than the atmospheric one due to the upwelling of the high DIC CDW, and this made the outside of Prydz Bay a source of carbon dioxide.On the basis of the calculations, the CO2 flux in January (austral summer) was -3.23 mmol/(m2·d) in the inner part of Prydz Bay, i.e., a sink of atmospheric CO2, and was 0.62 mmol/(m2·d) in the outside part of the bay, a weak source of atmospheric CO2.The average air-sea flux of CO2 in the Prydz Bay was 2.50 mmol/(m2·d). |
| 中文摘要: |
| The Prydz Bay in the Antarctic is an important area in the Southern Ocean due to its unique geographic feature.It plays an important role in the carbon cycle in the Southern Ocean.To investigate the distributions of carbon dioxide in the atmosphere and surface seawater and its air-sea exchange rates in this region, the Chinese National Antarctic Research Expedition (CHINARE) had set up several sections in the Prydz Bay.Here we present the results from the CHINARE-XVI cruises were presented onboard R/V Xuelong from November 1999 to April 2000 and the main driving forces were discussed controlling the distributions of partial pressure of carbon dioxide.According to the partial pressure of carbon dioxide distributions, the Prydz Bay can be divided into the inside and outside regions.The partial pressure of carbon dioxide was low in the inside region but higher in the outside region during the measurement period.This distribution had a good negative correlation with the concentrations of chlorophylla in general, suggesting that the partial pressure of carbon dioxide was substantially affected by biological production.The results also indicate that the biological production is most likely the main driving force in the marginal ice zone in the Southern Ocean in summer.However, in the Antarctic divergence sector of the Prydz Bay (about 64°S), the hydrological processes become the controlling factor as the sea surface partial pressure of carbon dioxide is much higher than the atmospheric one due to the upwelling of the high DIC CDW, and this made the outside of Prydz Bay a source of carbon dioxide.On the basis of the calculations, the CO2 flux in January (austral summer) was -3.23 mmol/(m2·d) in the inner part of Prydz Bay, i.e., a sink of atmospheric CO2, and was 0.62 mmol/(m2·d) in the outside part of the bay, a weak source of atmospheric CO2.The average air-sea flux of CO2 in the Prydz Bay was 2.50 mmol/(m2·d). |
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