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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(2) [June 2010] >
| Title: | Environmental controls on the seasonal carbon dioxide fluxes in the northeastern Indian Ocean |
| Authors: | Sardessai, S
Maya, M V
Shetye, Suhas
Kumar, S Prasanna
Fernandes, Veronica
paul, Jane
Ramaiah, N |
| Keywords: | Carbon dioxide fluxes
Salinity
Temperature
Primary productivity
Wind speed
Eddies
Seasonal variability
, Northeastern Indian Ocean |
| Issue Date: | Jun-2010 |
| Publisher: | CSIR |
| Abstract: |
Total
carbon dioxide (TCO2) and computations of partial pressure of carbon
dioxide (pCO2) had been examined in Northerneastern region of Indian
Ocean. It exhibit seasonal and spatial variability. North-south gradients in
the pCO2 levels were closely related to gradients in salinity caused
by fresh water discharge received from rivers. Eddies observed in this region
helped to elevate the nutrients availability and the biological controls by
increasing the productivity. These phenomena elevated the carbon dioxide draw
down during the fair seasons. Seasonal fluxes estimated from local wind speed
and air-sea carbon dioxide difference indicate that during southwest monsoon,
the northeastern Indian Ocean acts as a strong sink of carbon dioxide (-20.04
mmol m –2 d-1 ). Also during fall intermonsoon the area
acts as a weak sink of carbon dioxide (-4.69 mmol m –2 d-1 ).
During winter monsoon, this region behaves as a weak carbon dioxide source with
an average sea to air flux of 4.77 mmol m-2 d-1. In the
northern region, salinity levels in the surface level are high during winter
compared to the other two seasons. Northeastern Indian
Ocean shows significant intraseasonal variability in carbon
dioxide fluxes that are mediated by eddies which provide carbon dioxide and
nutrients from the subsurface waters to the mixed layer |
| Page(s): | 192-200 |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(2) [June 2010]
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