The impact of aerosols produced by biomass burning on the stratocumulus‐to‐cumulus transition (SCT) in the equatorial Atlantic is studied using satellite‐based and reanalysis data for the month of June. The month of June is highlighted because it represents monsoon onset as well as the largest sea surface temperature gradient in the summer, which is the peak season of tropical African biomass burning. Boundary layer deepening and increasing temperatures put the location of the SCT within the Gulf of Guinea. Satellite retrievals indicate that the bulk of aerosols occur near 1,500 m in altitude, either above or below the boundary layer depending on latitudinal position. Changes in smoke loading over the Gulf of Guinea due to greater transport from southern Africa leads to increases in low‐level cloud cover above cloud decks and decreases when mixed within the boundary layer. Further south, we find significant changes to temperature, cloud top height, tropospheric stability and moisture availability near maximum aerosol loading. In addition, changes in vertical velocity during dirty conditions further reinforce changes in tropospheric stability. These effects combine to shorten the SCT in space during increased aerosol loading episodes.

中文翻译：

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由生物质燃烧产生的气溶胶对赤道大西洋地层-丘陵-丘陵过渡的影响

利用6月份的卫星数据和再分析数据，研究了由生物质燃烧产生的气溶胶对赤道大西洋的平积云向积云过渡（SCT）的影响。突出显示6月，因为它代表季风爆发以及夏季最大的海面温度梯度，夏季是非洲热带生物质燃烧的高峰季节。边界层加深和温度升高使SCT的位置位于几内亚湾内。卫星检索表明，大部分气溶胶出现在海拔1,500 m附近，取决于纬度位置，在边界层之上还是之下。由于来自南部非洲的更多运输，几内亚湾的烟雾负荷变化导致云层以上的低空云层增加，而在边界层内混合时则减少。在更南的地方，我们发现温度，云顶高度，对流层稳定性和接近最大气溶胶负荷的水分供应量发生了明显变化。另外，在肮脏条件下垂直速度的变化进一步增强了对流层稳定性的变化。这些作用结合起来可以在增加气溶胶负荷期间缩短空间中的SCT。肮脏条件下垂直速度的变化进一步加强了对流层稳定性的变化。这些作用结合起来可以在增加气溶胶负荷期间缩短空间中的SCT。肮脏条件下垂直速度的变化进一步加强了对流层稳定性的变化。这些作用结合起来可以在增加气溶胶负荷期间缩短空间中的SCT。