Changes in the frequency and timing of extreme precipitation in southern Benin are assessed in the context of global warming. The peak-over-threshold (POT) is used for this purpose, with the six (06) year return period daily rainfall as the threshold over seventeen (17) weather stations between 1960 and 2018. The results show that the South Benin experienced extreme rainfall on many occasions between 1960 and 2018 with a nonuniform spatiotemporal distribution of this category of rainfall. No statistically significant trend in the frequency and variation of extreme rainfall intensities is revealed over the study period. Despite the low rate of extreme rainfall, the monthly trend is consistent with the bimodal rainfall regime in southern Benin. The global warming highlighted in its last decades in southern Benin is accompanied by a slightly upward trend in extreme rainfall compared to the period before 1990.

中文翻译：

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全球变暖背景下贝宁南部极端降雨的时空变化

在全球变暖的背景下评估了贝宁南部极端降水频率和时间的变化。峰值超过阈值 (POT) 用于此目的，以六 (06) 年重现期日降雨量作为 1960 年至 2018 年间十七 (17) 个气象站的阈值。结果表明，南贝宁经历了极端1960 年至 2018 年期间多次降雨，此类降雨的时空分布不均匀。在研究期间，极端降雨强度的频率和变化没有显着的统计趋势。尽管极端降雨率较低，但月度趋势与贝宁南部的双峰降雨状况一致。