AN Bin,XIAO Weiwei,ZHU Ni,et al.Spatiotemporal Evolution Characteristics of Cold Days with Different Grades in the Loess Plateau During 1960—2017[J].Research of Soil and Water Conservation,2023,30(01):327-335.[doi:10.13869/j.cnki.rswc.2023.01.013]
1960—2017年黄土高原不同等级寒冷日数时空演变特征
- Title:
- Spatiotemporal Evolution Characteristics of Cold Days with Different Grades in the Loess Plateau During 1960—2017
- 文章编号:
- 1005-3409(2023)01-0327-09
- Keywords:
- cold grade; cold days; spatiotemporal evolution; Hiatus; Loess Plateau
- 分类号:
- P468
- 文献标志码:
- A
- 摘要:
- 为正确认识全球气候变暖背景下黄土高原不同等级寒冷天气日数的变化特征,利用1960—2017年黄土高原58个站点的逐日最低气温数据,分析了不同等级寒冷(严寒、大寒、小寒、轻寒、微寒、凉)和总寒天气日数时空演变和波动特征,并探讨其对Hiatus现象的响应。结果表明:(1)随着寒冷等级的降低,1960—2017年黄土高原不同寒冷等级日数逐渐增加,且表现出明显空间差异特征,研究期黄土高原多数区域以大寒日数为主,其次是轻寒和凉日数。(2)黄土高原严寒、大寒、凉和总寒日数多呈减少趋势,小寒、轻寒和微寒日数均以增加趋势为主,且总寒日数减少主要是由大寒日数减少导致的; 变暖停滞(Hiatus)现象发生后,严寒、大寒、微寒和凉天气日数变化趋势均以偏高为主,小寒和轻寒日数变化趋势均以偏低为主,总寒日数变化趋势偏高与偏低分布相当。(3)黄土高原寒冷日数的变异系数随着寒冷等级的升高逐渐变小,各等级寒冷日数的波动特征空间分布较为复杂; Hiatus现象发生后,小寒、轻寒和微寒日数波动变化以偏低为主,大寒日数以偏低为主,总寒、严寒和凉日数波动偏高和偏低大致相当。综上,未来需要提防黄土高原地区小寒、轻寒和微寒对农业造成的低温冻害。
- Abstract:
- In the context of global warming, a correct understanding of the spatial distribution and evolution of cold weather days with different grades in the Loess Plateau can provide a strong reference for disaster prevention and mitigation. Based on the daily minimum temperature data of 58 meteorological stations over the Loess Plateau from 1960 to 2017, we analyzed the spatiotemporal evolution and fluctuation characteristics of cold days(severe cold, major cold, minor cold, light cold, minor cold, cool)and total cold days, and explored their responses to Hiatus phenomenon. The results show that the number of days with different cold grades gradually increased with the decrease of cold grades in the Loess Plateau during 1960—2017, and there were obvious spatial differences; during the study period, the number of major cold days was dominant in most areas of the Loess Plateau, followed by the number of light cold days and cool days; the number of cold days, major cold days, cold days and total cold days showed a decreasing trend, while the number of minor cold days, light cold days and mild cold days showed an increasing trend; the decrease of total cold days was mainly caused by the decrease of major cold days; after the occurrence of Hiatus, the variation trend of cold days, major cold days, minor cold days and cold days was mainly on the high side, while the variation trend of minor cold days and light cold days was mainly on the low side, and the variation trend of total cold days was similar; the variation coefficient of cold days on the Loess Plateau decreased with the increase of cold grades, and the spatial distribution of cold days on the loess Plateau was complex; after the occurrence of Hiatus, the fluctuations of minor cold days, light cold days and mild cold days were mainly on the low side, while those of major cold days were mainly on the low side; the fluctuations of total cold days, cold days and cool days were on the high side and on the low side. In the future, we need to beware of minor cold, light cold and slight cold caused by low temperature and freezing damage to agriculture.
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备注/Memo
收稿日期:2021-10-17 修回日期:2021-11-13
资助项目:陕西省科技厅项目“关中平原人地经济系统环境适应性评价及社会多元主体参与治理机制研究”(2021KRM033); 安康学院校级科研项目“汉江流域极端气候事件时空演变特征研究”(2021AYPT16)
第一作者:安彬(1988—),男,江西九江人,硕士,副教授,研究方向:区域环境评价与GIS应用。E-mail:leyang1007@126.com