Deep convective systems during active periods of the West African monsoon season have not been properly investigated over better temporal and spatial resolution in West Africa. Deep convective systems are investigated over seven climatic zones of the West African sub-region, which are as follows: west-coast rainforest, dry rainforest, Nigeria-Cameroon rainforest, Nigeria savannah, Central African and South Sudan (CASS) savannah, Sudano-Sahel, and Sahel, using data from Tropical Rainfall Measurement Mission (TRMM) Precipitation Feature (PF) database. The vertical structure of the convective systems indicated by the presence of at least one 40 dBZ and reaching (attaining) at least 1 km in the atmosphere showed strong core (highest frequency (%)) of reflectivity values around 2 km which is below the freezing level (4–5 km) for all the zones. Echoes are detected above the 15-km altitude much more frequently in the rainforest and Savannah zones than the Sudano and Sahel zones during active periods in March–May (MAM), whereas during active periods in June–September (JJAS), the savannahs, Sudano, and Sahel zone convections tend to reach higher altitude more frequently than the rainforest zones. The frequencies of deep convection defined by the presence of at least one 40 dBZ, reaching (attaining) at least 1 km in the atmosphere, with sizes greater than 2000 square, and having at least one convective pixels indicate that these systems are within the range of 2.3–2.8% in frequency averaged over the 16-year period of study in both March–May (MAM) and June–September (JJAS) active periods in the rainforest and savannah zones. These were found to be less than 2% in the Sudano and Sahel zones, except for the active JJAS period in Sudano zone.

尚未对西非季风季节活跃期的深对流系统进行更好的西非时间和空间分辨率研究。在西非次区域的七个气候区对深对流系统进行了调查，这些区域包括：西海岸雨林，干旱雨林，尼日利亚-喀麦隆雨林，尼日利亚大草原，中非和南苏丹（CASS）大草原，苏达诺-萨赫勒（Sahel）和萨赫勒（Sahel），使用来自热带雨量测量任务（TRMM）降水特征（PF）数据库的数据。对流系统的垂直结构由至少一个40 dBZ的存在并在大气中达到（达到）至少1 km表示，显示出2 km附近的强反射率值的核心（最高频率（％）），该值低于冰点所有区域的水平（4-5 km）。在3月至5月（MAM）的活跃期中，在雨林和萨凡纳地区高于15公里高度的回声比Sudano和Sahel地区更为频繁，而在6月至9月（JJAS）的活跃期中，大草原，苏达诺和萨赫勒地区的对流往往比雨林地区更频繁地到达更高的高度。深对流的频率由存在至少一个40 dBZ，在大气中达到（达到）至少1 km，尺寸大于2000平方并且具有至少一个对流像素来定义，表示这些系统在此范围内在雨林和热带稀树草原地区，在3月至5月（MAM）和6月至9月（JJAS）活跃期的16年研究期间，平均频率为2.3–2.8％。在苏达诺和萨赫勒地区，这些比例不到2％，