干旱区研究 ›› 2024, Vol. 41 ›› Issue (8): 1259-1271.doi: 10.13866/j.azr.2024.08.01 cstr: 32277.14.j.azr.2024.08.01
袁征1(), 张志高2, 闫瑾2, 刘嘉毅2, 胡柱钰2, 王赟3, 蔡茂堂4()
收稿日期:
2024-01-08
修回日期:
2024-04-15
出版日期:
2024-08-15
发布日期:
2024-08-22
通讯作者:
蔡茂堂. E-mail: Caimaotang@126.com作者简介:
袁征(1988-),女,讲师,主要从事气候变化与气候统计研究. E-mail: yz_12250804@163.com
基金资助:
YUAN Zheng1(), ZHANG Zhigao2, YAN Jin2, LIU Jiayi2, HU Zhuyu2, WANG Yun3, CAI Maotang4()
Received:
2024-01-08
Revised:
2024-04-15
Published:
2024-08-15
Online:
2024-08-22
摘要:
黄河流域是我国重要的生态脆弱区,明确流域不同等级降水量与降水天数、降水强度之间的关系,可为揭示流域降水规律提供基础信息。基于1960—2020年黄河流域96个气象站点降水资料,采用数理统计和Pearson相关分析等方法对流域不同等级降水时空演变特征进行了分析,探讨了不同等级降水对总降水的贡献和影响。结果表明:近61 a黄河流域年降水量和降水强度分别以0.008 mm·(10a)-1和0.12 mm·d-1·(10a)-1(P<0.01)的倾向率增加,降水日数以-1.82 d·(10a)-1的倾向率减少(P<0.01),小雨和中雨量与日数均呈减少趋势,大雨、暴雨和大暴雨量与日数均呈上升趋势,各等级降水强度均呈增加趋势。近61 a小雨发生率最高为84.32%,小雨贡献率最大,为37.64%;中雨次之,为34.47%;小雨发生率(P<0.01)和贡献率呈减少趋势,大雨以上降水发生率和贡献率呈增加趋势。黄河流域小雨量、小雨日数和小雨强度在西南部形成高值中心,随着降水等级的增加,降水量、降水日数和降水强度的高值区域主要集中在流域东南部。相关分析表明,黄河流域年总降水量受中雨和大雨量影响较大,年总降水日数受小雨日数影响较大,年总降水强度受大雨和暴雨量及其降水日数的影响较大。研究结果可为流域生态保护提供参考。
袁征, 张志高, 闫瑾, 刘嘉毅, 胡柱钰, 王赟, 蔡茂堂. 1960—2020年黄河流域不同等级降水时空特征[J]. 干旱区研究, 2024, 41(8): 1259-1271.
YUAN Zheng, ZHANG Zhigao, YAN Jin, LIU Jiayi, HU Zhuyu, WANG Yun, CAI Maotang. Spatiotemporal characteristics of different grades of precipitation in Yellow River Basin from 1960 to 2020[J]. Arid Zone Research, 2024, 41(8): 1259-1271.
表1
1960—2020年黄河流域上中下游地区不同等级降水变化"
地区 | 上游 | 中游 | 下游 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
降水量 /mm | 降水 日数/d | 降水强度 /(mm·d-1) | 降水量 | 降水日数 | 降水强度 /(mm·d-1) | 降水量 | 降水日数 | 降水强度 /(mm·d-1) | ||||
小雨 | 均值 | 201.56 | 87.37 | 2.26 | 179.69 | 74.79 | 2.41 | 149.92 | 61.6 | 2.43 | ||
倾向率 | 0.85 | -1.11* | 0.04** | -3.45* | -2.28** | 0.03** | -2.22* | -2.69** | 0.04** | |||
中雨 | 均值 | 147.04 | 9.93 | 14.66 | 192.72 | 12.38 | 15.5 | 178.06 | 11.23 | 15.69 | ||
倾向率 | 2.41 | 0.15 | 0.06 | -2.27 | -0.18 | 0.03 | -1.02 | -0.06 | -0.1 | |||
大雨 | 均值 | 45.27 | 1.42 | 21.57 | 123.62 | 3.63 | 32.03 | 176.84 | 5.14 | 33.84 | ||
倾向率 | 1.26 | 0.03 | 0.44 | 1.22 | 0.04 | 0.13 | -0.42 | -0.02 | -0.2 | |||
暴雨 | 均值 | 9.12 | 0.15 | 7.59 | 46.01 | 0.72 | 30.94 | 129.38 | 1.94 | 54.83 | ||
倾向率 | -0.49 | -0.01 | -0.17 | 1.56 | 0.02 | 0.36 | -1.02 | -0.01 | -1.16 | |||
大暴雨 | 均值 | 1.21 | 0.01 | 0.93 | 7 | 0.06 | 6.69 | 51.15 | 0.38 | 39.67 | ||
倾向率 | -0.36 | -0.002 | -0.2 | 0.22 | 0.001 | 0.13 | 1.77 | 0.01 | 1.48 |
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