Annual climate indicators of NRW
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Historical weather data from North Rhine-Westphalia were re-analysed with a spatial resolution of 1 km and aggregated on an annual basis to climate indicators: consequtive ice days: Duration of the longest frost period (Tmax &lt; 0 °C) in days dry periods strong Rainfall: Number of events per year where more than 10 mm of precipitation occurred after a dry period of at least 5 days with precipitation &= 1 mm freeze Thaws cycles: Number of days with frost-thaw change (Tmax &=2C° & Tmin =< —2 °C) frost days: Number of days with Tmin &lt; 0 °C heat waves: Number of heat waves per year, where a heat wave is defined as 6 consecutive days with Tmax & = 30 °C hot days: Number of hot days with T & = 30 °C per year ice days: Number of days with Tmax &lt; =°C Max prc sum 5 days: maximum precipitation total [mm] over 5 consecutive days Max spread: maximum temperature difference per day, averaged over one year mean t max: daily temperature maximum, averaged over one year mean t max summer: daily temperature maximum in the months of April to September, averaged over 6 these months mean t min: daily temperature minimum, averaged over one year mean t min winter: daily temperature minimum in the months of October to March, averaged over 6 these months pot snow day: Number of potential snow days (fall &= 0.5 mm & Tmean =< 2 °C) prec sum 10 mm days: Number of days with precipitation & 10 mm prec sum 20 mm days: Number of days with precipitation & 20 mm prec sum year: Precipitation total [mm] per year summer days: Number of summer days with T & = 25 °C per year summer days RR 5: Number of summer days with a rainfall of 5 mm summer days RR 10: Number of summer days with a rainfall of 10 mm summer days RR 20: Number of summer days with a rainfall of 20 mm T min: lowest temperature per year T max: highest temperature per year tropical nights: Number of nights with Tmin & = 20 °C (between 0 and 24 o'clock)
本数据集针对北莱茵-威斯特伐利亚州(North Rhine-Westphalia)的历史气象数据开展了空间分辨率为1千米的再分析,并按年尺度聚合得到如下气候指标: 1. 连续结冰日数(Consecutive Ice Days):单次最长霜冻期的持续时长(单位:天),定义为日最高气温低于0℃的时段。 2. 干旱期强降雨事件数(Dry Periods Strong Rainfall):每年中,在至少连续5天日降水量≤1mm的干旱期之后,出现单日降水量超过10mm的事件总次数。 3. 冻融循环次数(Freeze-Thaw Cycles):出现冻融转换的天数,即日最高气温≥2℃且日最低气温≤-2℃的天数。 4. 霜冻日数(Frost Days):日最低气温低于0℃的天数。 5. 热浪次数(Heat Waves):每年的热浪总次数,热浪定义为连续6天日最高气温≥30℃的时段。 6. 酷热日数(Hot Days):每年中日最高气温≥30℃的天数。 7. 结冰日数(Ice Days):日最高气温≤0℃的天数。 8. 5日最大累积降水量(Max 5-Day Precipitation Sum):连续5天的最大降水总量,单位为毫米。 9. 日最大气温极差(Max Temperature Spread):全年单日气温极差的年均值。 10. 年平均日最高气温(Mean Daily Maximum Temperature):全年日最高气温的平均值。 11. 夏季平均日最高气温(Mean Daily Maximum Temperature Summer):4月至9月的日最高气温在该6个月内的平均值。 12. 年平均日最低气温(Mean Daily Minimum Temperature):全年日最低气温的平均值。 13. 冬季平均日最低气温(Mean Daily Minimum Temperature Winter):10月至次年3月的日最低气温在该6个月内的平均值。 14. 潜在降雪日数(Potential Snow Days):日平均气温≤2℃且降雪量≥0.5mm的天数。 15. 日降水量≥10mm天数(Precipitation Sum 10mm Days):单日降水量≥10mm的天数。 16. 日降水量≥20mm天数(Precipitation Sum 20mm Days):单日降水量≥20mm的天数。 17. 年总降水量(Precipitation Sum Year):全年的降水总量,单位为毫米。 18. 夏日日数(Summer Days):每年中日最高气温≥25℃的天数。 19. 5mm降雨夏日日数(Summer Days RR 5):单日降水量≥5mm的夏日天数。 20. 10mm降雨夏日日数(Summer Days RR 10):单日降水量≥10mm的夏日天数。 21. 20mm降雨夏日日数(Summer Days RR 20):单日降水量≥20mm的夏日天数。 22. 年极端最低气温(Tmin Annual):全年出现的最低气温。 23. 年极端最高气温(Tmax Annual):全年出现的最高气温。 24. 热带夜数(Tropical Nights):夜间最低气温≥20℃的夜晚数,时段为0时至24时。



