Reconciling the paradox that the heterotrophic waters of the East China Sea shelf act as a significant CO2 sink during the summertime: Evidence and implications

Wen Chen Chou, Gwo Ching Gong, David D. Sheu, Sen Jan, Chin Chang Hung, Chung Chi Chen

研究成果: 雜誌貢獻文章

30 引文 斯高帕斯(Scopus)

摘要

To explore the paradox that the heterotrophic waters of the East China Sea (ECS) shelf act as a significant CO2 sink in summer, vertical structures of carbon chemistry and hydrography were examined in July 2007. The results show that waters above the pycnocline (-10 to 30 m) in the major CO 2 sink area are supersaturated with oxygen (110 ± 7%; autotrophic) but undersaturated with respect to atmospheric CO2 (△fCO2 = -130 ± 58 μatm; sink). In contrast, waters below the pycnocline are undersaturated with respect to oxygen (61 ± 16%; heterotrophic) but supersaturated with CO2 (△fCO2 = 116 ± 115 μatm; source). This demonstrates that summer stratification is the key factor maintaining the CO2 sink status in the heterotrophic ECS shelf waters. Furthermore, the shallow pycnocline can easily be broken down when strong mixing occurs, potentially allowing the respired CO2 stored in the subsurface waters to return to the atmospnere

原文英語
文章編號L15607
期刊Geophysical Research Letters
36
發行號15
DOIs
出版狀態已發佈 - 2009 八月 16

    指紋

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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