The Red River Delta (RRD) is one of the regions most significantlyimpacted by climate change (CC) in Vietnam. This study utilizes correlationassessment methods and regression equations to evaluate the trends of certainmeteorological factors and extreme weather events during the period 1961 - 2020 inthe RRD. Overall, climate factors across the region exhibit quite clear trends ofchange. The highest trends in annual average temperature and maximum annualaverage temperature are observed in the northwestern part of the RRD, especially inmajor cities such as Ha Noi (the increase in mean annual temperature ranges from0.0317 - 0.0336 ºC/year). The lowest trends in these temperatures are found incoastal, island, and mountainous areas (the increase in mean annual temperatureranges from 0.0133 - 0.0224 ºC/year). The annual rainfall reports a decreasing trendat 17 out of 23 meteorological stations in the RRD, varying from -11 to 9 mm/year.Extreme weather phenomena report little significant change, with maximum dailyrainfall records a decreasing trend, varying from -3.119 to 1.395 mm/year
thenumber of days with rainfall exceeding 50 mm also reports a decrease, varying from-0.058 to 0.017 days/year. The results of this study will serve as a basis fordeveloping action plans to respond to CC in the RRD.The Red River Delta (RRD) is one of the regions most significantlyimpacted by climate change (CC) in Vietnam. This study utilizes correlationassessment methods and regression equations to evaluate the trends of certainmeteorological factors and extreme weather events during the period 1961 - 2020 inthe RRD. Overall, climate factors across the region exhibit quite clear trends ofchange. The highest trends in annual average temperature and maximum annualaverage temperature are observed in the northwestern part of the RRD, especially inmajor cities such as Ha Noi (the increase in mean annual temperature ranges from0.0317 - 0.0336 ºC/year). The lowest trends in these temperatures are found incoastal, island, and mountainous areas (the increase in mean annual temperatureranges from 0.0133 - 0.0224 ºC/year). The annual rainfall reports a decreasing trendat 17 out of 23 meteorological stations in the RRD, varying from -11 to 9 mm/year.Extreme weather phenomena report little significant change, with maximum dailyrainfall records a decreasing trend, varying from -3.119 to 1.395 mm/year
thenumber of days with rainfall exceeding 50 mm also reports a decrease, varying from-0.058 to 0.017 days/year. The results of this study will serve as a basis fordeveloping action plans to respond to CC in the RRD.