| 1967—2016年黄河上游河曲地区降水变化特征研究 |
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| 引用本文： | 杨春华,燕振宁,周 丹,保广裕.1967—2016年黄河上游河曲地区降水变化特征研究 [J].新疆气象,2020,14(2):43-49. |
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| 作者姓名： | 杨春华 燕振宁 周 丹 保广裕 |
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| 作者单位： | 青海省气象服务中心,青海省气象服务中心,青海省气象服务中心,青海省气象服务中心 |
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| 摘 要： | 利用1967~2016年黄河上游河曲地区的5个气象站观测气象站的逐日地面降水和气温资料,利用气候变化趋势分析、距平、Mann-kendall 时间序列突变及趋势检验方法分析了该地区气温变化特征、不同类型各等级降水量及降水日数的气候特征。结果表明：(1)近50年黄河上游河曲地区年均气温以0.459℃/10a趋势显著上升,上升速度低于全国其它地区,且在2002年气温发生突变后升温加剧；(2)年降水量和降水日数呈减少趋势,主要是由夏季小雨量和小雨日数的减少引起；(3)在2002年气温突增后,强降水对总降水量贡献率增加,且年降水量和降水日数波动幅度也明显增大,这可能预示该地区洪涝灾害的风险在增加。降水日数的贡献率增加,增加明显的是中雨日数和小雨日数,分别增加了1.1%和1.7%。
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| 关 键 词： | 黄河上游 河曲地区 降水量 降水日数 |
| 收稿时间： | 2019/2/28 0:00:00 |
| 修稿时间： | 2019/5/16 0:00:00 |
Change Features of Precipitation over Hequ region of the upper reaches of Yellow River in 50 years |
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| Yang Chunhu,Yan Zhengning,Zhou Dan and Bao Guangyu.Change Features of Precipitation over Hequ region of the upper reaches of Yellow River in 50 years[J].Bimonthly of Xinjiang Meteorology,2020,14(2):43-49. |
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| Authors: | Yang Chunhu Yan Zhengning Zhou Dan and Bao Guangyu |
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| Institution: | Qinghai Meteorological Service Center,Xining,810001,Qinghai Meteorological Service Center,Xining,810001,Qinghai Meteorological Service Center,Xining,810001,Qinghai Meteorological Service Center,Xining,810001 |
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| Abstract: | Using the weather stations from the five meteorological stations in the upper reaches of the Yellow River from 1967 to 2016 to observe the daily precipitation and temperature data of the meteorological station, using climate change trend analysis, anomalies, Mann-kendall time series mutations and trend test methods to analyze the temperature changes in the area. The climatic characteristics of the characteristics, the types of precipitation of different types and the number of precipitation days. The results show that: (1) The average annual temperature in the upper reaches of the Yellow River in the past 50 years has increased significantly with the trend of 0.459 °C/10a, and the rising rate is lower than that of other parts of the country, and the temperature rises after the sudden change of temperature in 2002; (2) Annual precipitation And the number of precipitation days showed a decreasing trend, mainly caused by the decrease of summer rainfall and light rain days; (3) After the sudden increase in temperature in 2002, the contribution rate of heavy precipitation to total precipitation increased, and the annual precipitation and precipitation days fluctuated It is also significantly increased, which may indicate an increased risk of flooding in the region. The contribution rate of precipitation days increased, and the increase was marked by the number of rainy days and light rain days, which increased by 1.1% and 1.7% respectively. |
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| Keywords: | Upper reaches of the Yellow River Hequ area precipitation precipitation days |
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