Emission of carbon dioxide from a tropical estuarine system, Goa, India
Carbon dioxide species were studied in Mandovi-Zuari system, a tropical estuarine complex influenced by strong monsoonal run-off, with implications to build up and air-water exchange of CO 2 . Total carbon dioxide (TCO 2 ) behaved conservatively during the estuarine mixing. Partial pressure of carbo...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
American Geophysical Union
2001
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| Subjects: | |
| Online Access: | http://repository.ias.ac.in/9808/ http://www.agu.org/pubs/crossref/2001/2000GL006114.shtml |
| Summary: | Carbon dioxide species were studied in Mandovi-Zuari system, a tropical estuarine complex influenced by strong monsoonal run-off, with implications to build up and air-water exchange of CO 2 . Total carbon dioxide (TCO 2 ) behaved conservatively during the estuarine mixing. Partial pressure of carbon dioxide (pCO 2 ), evaluated from TCO 2 and pH couple, and carbonic acid dissociation constants, exhibited supersaturation with respect to atmospheric CO 2 round the year. The pCO 2 attained maximal levels over 2000 µatm in waters of early estuarine mixing. Average pCO 2 in estuarine system were 1045 and 1153, µatm (three times to that in atmosphere) in non- southwest (SW) and SW monsoon seasons, respectively. An experimental study revealed that soil-water interaction could be an important controller of pCO 2 abundance in these estuarine waters. The calculated water-to-air average fluxes were 67 and 11 mmol m -2 d -1 , respectively, in SW monsoon due to higher wind speeds and non-SW monsoons. This study strongly suggests that pH regulation by soil-water interaction is important, besides biological processes, in river and estuarine systems. |
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