Carbon dioxide (CO₂) and Methane (CH₄) are considered the most crucial climate forcing greenhouse gases due to their significant impacts on climate systems. The present study is aimed at analyzing the long-term (2004–2016) concentration patterns of CO₂ and CH₄ over Malawi located in Southeast Africa using the observations from Atmospheric Infrared Sounding (AIRS). The study found an annual increase concentration of CO₂ and CH₄, with a rate of 7.08% and 1.66%, respectively; whereas, the respective concentration levels of CO₂ and CH₄ in 2016 were noted as >400 ppm and >750 ppb, which is comparable to that reported by IPCC (2014) over the globe. The monthly and seasonal analyses revealed that high patterns are associated with biomass burning season, changes in vegetation cover, and long-range transport. The two trace gases were seasonally correlated with carbon-containing compounds produced from incomplete combustion and biomass burning. The trace gases and pollutants are emitted from the burning of crop residues during the harvesting season, besides, open burning of forests and vehicular emissions. The present study also detected a seasonal increase in CO₂ and CH₄ concentrations during JJA and SON seasons. The temperature (T °C) exhibited profound correlation with CO₂ (r = 0.75, p < 0.01) and CH₄ (r = 0.80, p < 0.01) during the pollution peak season of SON. Moreover, CO₂ and CH₄ showed significant positive correlation with cloud top temperature (r = 0.56, p < 0.05 and r = 0.74, p < 0.01, respectively) and negative correlation with cloud fraction (r = −0.55, p < 0.05 and r = −0.69, p < 0.01, respectively) during SON, imply extensive climatic effect by the trace gases during high pollution season. The backward air mass trajectories divulge a contribution of distant produced pollutants from neighboring Mozambique, Madagascar Islands, and the South American continent. The major sinks of tropospheric CO₂ and CH₄ observed from the present study are precipitation and vegetation.

二氧化碳（CO ₂）和甲烷（CH ₄）由于对气候系统有重大影响，因此被认为是推动温室气体排放的最关键的气候。本研究旨在使用来自大气红外测深仪（AIRS）的观测数据，分析位于南非马拉维的CO ₂和CH ₄的长期（2004-2016）浓度模式。研究发现，CO ₂和CH _4的浓度逐年增加，增长率分别为7.08％和1.66％。而CO ₂和CH ₄各自的浓度水平2016年记录为> 400 ppm和> 750 ppb，这与IPCC（2014）在全球范围内报告的结果相当。月度和季节分析显示，高模式与生物质燃烧季节，植被覆盖度变化和远距离运输有关。两种微量气体与不完全燃烧和生物质燃烧产生的含碳化合物在季节上相关。收获季节燃烧作物残渣会排放微量气体和污染物，此外还包括森林的露天焚烧和车辆排放。本研究还发现，在JJA和SON季节，CO ₂和CH ₄浓度随季节增加。温度（T°C）与CO ₂表现出深层相关性在SON的污染高峰季节（r = 0.75，p <0.01）和CH ₄（r = 0.80，p <0.01）。此外，CO ₂和CH ₄与云顶温度呈显着正相关（r = 0.56，p <0.05和r = 0.74，p <0.01），与云层分数呈负相关（r = -0.55，p <0.05和p）。 SON期间r = -0.69，p分别为<0.01），意味着高污染季节微量气体对气候的广泛影响。向后的空气质量轨迹泄露了邻近的莫桑比克，马达加斯加群岛和南美大陆产生的遥远污染物的贡献。对流层CO ₂和CH ₄的主要汇 从本研究中观察到的是降水和植被。