Tropical forest ecosystems play a significant role in controlling the global carbon cycle. Several bio-meteorological parameters control the carbon dynamics of a forest ecosystem. We have studied the bio-meteorological processes of a tropical semi-deciduous forest in northeast India to understand the dynamics of the net ecosystem exchange (NEE). On a monthly scale, it is observed that mostly the leaf area index, incoming radiation, vapor pressure deficit, and air temperature control the carbon transfer processes. Furthermore, the diurnal patterns of rainfall and associated cloudiness during the monsoon season indirectly control the carbon uptake by modulating the incoming radiation. The pre-monsoon season is the most preferred, while the winter season is the least favorite time for carbon uptake by this forest. The respiration component of the studied forest ecosystem is higher than the other similar ecosystems in India. The estimated annual NEE of the forest was +177 and -31 gC m⁻² yr⁻¹ for 2016 and 2018, respectively. The forest's annual gross primary productivity (GPP) for 2016 and 2018 was estimated as 2693 and 2564 gC m⁻² yr⁻¹, respectively.

热带森林生态系统在控制全球碳循环方面发挥着重要作用。几个生物气象参数控制着森林生态系统的碳动态。我们研究了印度东北部热带半落叶林的生物气象过程，以了解净生态系统交换 (NEE) 的动态。在月度尺度上，观察到主要是叶面积指数、传入辐射、蒸气压不足和空气温度控制碳转移过程。此外，季风季节降雨的昼夜模式和相关的云量通过调节入射辐射间接控制碳吸收。季风前的季节是最受欢迎的，而冬季是这片森林最不喜欢的碳吸收时间。研究的森林生态系统的呼吸成分高于印度其他类似的生态系统。森林的估计年 NEE 为 +177 和 -31 gC m^-2 yr ^-1分别为 2016 年和 2018 年。2016 年和 2018 年森林的年度总初级生产力 (GPP) 估计分别为 2693 和 2564 gC m ^-2 yr ^-1。