In this study, we evaluate trends in precipitation and temperature and their related extreme indices in Morocco based on a set of National Climate Monitoring Products defined the by the commission for climatology of the WMO. We use daily precipitation, maximum and minimum temperature data from 30 meteorological stations distributed throughout the country and covering the period from 1960 to 2016. Statistically significant increasing trends in warm temperature events and a tendency towards decreasing cold extremes at both daytime and night are depicted across the country consistent with the generalized observed global warming. We found that the daily temperature in Morocco has risen with higher rates than the global scale. The depicted trend of 0.33°C per decade corresponds to a warming of approximately 1.1°C for the period 1984–2016. The annual mean precipitation and the standardized drought index show less spatially consistent tendencies despite the predominance of negative trends. Considering the effect of the warming in the analysis of drought evolution using the Standardized Precipitation‐Evapotranspiration Index, we detected statistically significant trends towards dryer conditions in different regions of the northern half of the country. Analysis of the relationship between precipitation in Morocco and the large‐scale atmospheric circulation in the Atlantic area confirmed the effects of the North Atlantic Oscillation, especially for the winter season (with low influence at the annual scale). Moreover, we found that the NAO exerts significant influence on winter extreme temperatures during night time. However, such correlations alone may not explain the depicted significant generalized warming trends and the drying evolution.

中文翻译：

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摩洛哥最近观察到的全国性气候趋势

在这项研究中，我们根据一组由WMO气候学委员会定义的国家气候监测产品，评估了摩洛哥的降水和温度趋势及其相关的极端指数。我们使用分布在全国各地并涵盖1960年至2016年的30个气象站的每日降水量，最高和最低温度数据。在整个温度范围内，描绘了白天和夜晚的温暖温度事件的统计上显着增加趋势以及极端天气在减少的趋势与全球观测到的全球变暖一致的国家。我们发现摩洛哥的每日温度上升速度超过了全球范围。所描绘的每十年0.33°C的趋势对应于1984-2016年期间约1.1°C的变暖。尽管负趋势占主导地位，但年平均降水量和标准干旱指数的空间一致性趋势较小。考虑到变暖对使用标准降水-蒸散指数的干旱演变分析的影响，我们在该国北部半部的不同地区检测到了干燥状况的统计学显着趋势。对摩洛哥降水与大西洋地区大规模大气环流之间关系的分析证实了北大西洋涛动的影响，尤其是在冬季（对年尺度的影响较小）。此外，我们发现NAO在夜间对冬季极端温度产生重大影响。然而，