Fig. (2) Optimized air-sea CO₂ flux (mole/m²/sec) for the global ocean from APDRC. It is model output. Positive values of CO₂ show downward flux while negative values upwards. (a to l) Spatial pattern of CO₂ flux (*10^-7 mole/m²/sec) for each year (m) CO₂ flux (*10^-7 mole/m²/sec), area averaged over the small box (shown in a) over Bay of Bengal.