Role of biology in the air–sea carbon flux in the Bay of Bengal and Arabian Sea
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Role of biology in the air–sea carbon flux in the Bay of
Bengal and Arabian Sea
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| Creator |
M K, Sharada
P S, Swathi K S, Yajnik |
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| Subject |
Carbon Cycle
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| Description |
A physical-biological-chemical model (PBCM) is used for investigating the seasonal cycle of
air–sea carbon flux and for assessing the effect of the biological processes on seasonal time scale
in the Arabian Sea (AS) and Bay of Bengal (BoB), where the surface waters are subjected to
contrasting physical conditions. The formulation of PBCM is given in Swathi et al (2000), and
evaluation of several ammonium-inhibited nitrate uptake models is given in Sharada et al (2005).
The PBCM is here first evaluated against JGOFS data on surface pCO2 in AS, Bay of Bengal
Process Studies (BoBPS) data on column integrated primary productivity in BoB, and WOCE I1
data on dissolved inorganic carbon (DIC) and alkalinity (ALK) in the upper 500 meters at 9◦N
in AS and at 10◦N in BoB in September–October. There is good qualitative agreement with local
quantitative discrepancies.
The net effect of biological processes on air–sea carbon flux on seasonal time scale is determined
with an auxiliary computational experiment, called the abiotic run, in which the biological processes
are turned off. The difference between the biotic run and abiotic run is interpreted as the net effect
of biological processes on the seasonal variability of chemical variables. The net biological effect
on air–sea carbon flux is found to be highest in southwest monsoon season in the northwest AS,
where strong upwelling drives intense new production. The biological effect is larger in AS than in
BoB, as seasonal upwelling and mixing are strong in AS, especially in the northeast, while coastal
upwelling and mixing are weak in BoB
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| Publisher |
Indian Academy of Sciences
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| Date |
2008-08
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/147/1/mkspssksy08.pdf
M K, Sharada and P S, Swathi and K S, Yajnik (2008) Role of biology in the air–sea carbon flux in the Bay of Bengal and Arabian Sea. Journal of Earth System Science, 117 (4). pp. 1-19. |
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| Relation |
http://www.ias.ac.in/jess/
http://cir.cmmacs.ernet.in/147/ |
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