We apply a coupled physical and biogeochemical (ROMS+PISCES) to understand the influence of distinct drivers and mechanisms on the sea-surface pCO₂ and the air-sea CO₂ flux of the Bay of Bengal (BoB). The model evaluation suggests that the model simulated sea-surface pCO₂ is in accord with the observations. The north of BoB is found to be a sink for the atmospheric CO₂, whereas the rest of the region acts as a source. The effect of dissolved inorganic carbon (DIC) and the total alkalinity (TALK) is found to be predominant but is contrasting in nature. Mixing-induced changes in DIC and TALK results in high pCO₂ (+570μatm) and, consequently, the positive CO₂ flux. The biological activity does draw down the surface pCO₂ (−120μatm) but is insufficient in completely opposing the effect of mixing. The uptake of CO₂ in the north is due to the CO₂ solubility, which is a function of salinity and temperature. The northern rivers, having a high discharge rate, reduce the salinity and temperatures in the north, which possibly aids in this region to be a sink. In the northeast monsoon season, the impact of temperature and DIC is high and opposing. The TALK reduces the pCO₂ in the northeast monsoon, but the magnitude is low. The pCO₂ in the southwest monsoon is influenced primarily by temperature, whereas in the postmonsoon monsoon, the freshwater dominates. The pre-monsoon season experiences the TALK, temperature, and freshwater increase the pCO₂ anomalies, and only the DIC reduces pCO₂ anomalies.

我们应用物理和生物地球化学耦合 (ROMS+PISCES) 来了解不同驱动因素和机制对孟加拉湾 (BoB)的海面p CO ₂和海气 CO _{2通量的影响。}模型评价表明模型模拟的海面p CO ₂与观测结果一致。BoB 北部被发现是大气 CO _2的汇，而该地区的其余部分则充当源。溶解无机碳 (DIC) 和总碱度 (TALK) 的影响被发现是主要的，但在本质上是相反的。混合引起的 DIC 和 TALK 变化导致高p CO ₂ (+570μatm )，因此，正 CO ₂通量。生物活性确实会降低表面p CO ₂ (-120 μatm )，但不足以完全对抗混合效果。北方吸收CO ₂是由于CO ₂溶解度，这是盐度和温度的函数。北部河流流量大，降低了北部的盐度和温度，这可能有助于该地区成为汇。在东北季风季节，气温和DIC的影响高且相反。TALK 降低了东北季风中的p CO ₂，​​但幅度很小。p _西南季风中的CO ₂主要受温度影响，而在季风后季风中，淡水占主导地位。前季风季节经历 TALK、温度和淡水增加p CO ₂异常，只有 DIC 减少p CO ₂异常。