Trend Assessment of National Climate Monitoring Products (NCMP) index in Benin, from 1981 to 2020

This study aims to assess the extreme climate trends over Benin for two climatology references periods: 1981-2010 and 1991-2020. The R-NCMP package developed by the expert team of WMO on National climate monitoring products (NCMP) was used to calculate the climate indices. Daily precipitation, maximum and minimum temperature data are used over the country to quantify the pattern of different indices based on a set of National Climate Monitoring Products defined by the WMO. A parametric method (linear regression) and a non-parametric method (Mann-Kendall) are used for trend analyses. As a result, significant increasing trends of extreme climate indices (total precipitation anomaly, mean temperature anomaly, percentage of warm days and nights) at the level of 0.05 are found. Furthermore, decreasing in cold nights and cold days over these two periods is highlighted. This study has contributed to improving climate information over country level that is more relevant for decision-making and for policymakers. It reveals more climate-related risks within a country to feed impact studies in key sectors of the development, such as agriculture water resources and well-being.