Acta Geographica Sinica ›› 2020, Vol. 75 ›› Issue (5): 989-1007.doi: 10.11821/dlxb202005008
• Climate Change and Surface Process • Previous Articles Next Articles
LI Shuangshuang, WANG Chengbo, YAN Junping, LIU Xianfeng
Received:
2019-03-18
Revised:
2020-02-18
Online:
2020-05-25
Published:
2020-07-25
Supported by:
LI Shuangshuang, WANG Chengbo, YAN Junping, LIU Xianfeng. Variability of the event-based extreme precipitation in the south and north Qinling Mountains[J].Acta Geographica Sinica, 2020, 75(5): 989-1007.
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Tab. 1
The cross-validation result of spatial precipitation interpolation in the south and north of Qinling Mountains
类型 | 插值要素 | 有效参数 (Signal) | 剩余自由度 (Error) | 信噪比 (SNR) | 误差估计均方根 (RTMSE) | 噪音估计标准差 (RTVAR) |
---|---|---|---|---|---|---|
降水量 平均态 | 1970—2000年 | 21.0 | 50.0 | 0.42 | 25.9 | 46.2 |
1980—2010年 | 22.7 | 48.3 | 0.45 | 26.2 | 45.6 | |
1990—2017年 | 18.1 | 52.9 | 0.36 | 24.0 | 47.6 | |
2008—2017年 | 18.9 | 52.1 | 0.38 | 28.1 | 54.5 | |
极端降水量平均态 | 1970—2000年 | 16.0 | 55.0 | 0.32 | 18.7 | 39.4 |
1980—2010年 | 18.8 | 52.2 | 0.38 | 19.5 | 38.0 | |
1990—2017年 | 17.4 | 53.6 | 0.35 | 19.8 | 40.0 | |
2008—2017年 | 14.9 | 56.1 | 0.30 | 23.9 | 52.1 | |
累积极端 降水频次 | 偏前型 | 11.2 | 59.8 | 0.22 | 0.0072 | 0.0182 |
偏后型 | 13.7 | 57.3 | 0.27 | 0.0061 | 0.0140 | |
均衡型 | 9.4 | 61.6 | 0.19 | 0.0054 | 0.0149 | |
单日型 | 11.1 | 59.9 | 0.22 | 0.0069 | 0.0174 | |
累积极端 降水量 | 偏前型 | 8.3 | 62.7 | 0.17 | 0.0073 | 0.0214 |
偏后型 | 12.7 | 58.3 | 0.25 | 0.0092 | 0.0217 | |
均衡型 | 10.6 | 60.4 | 0.21 | 0.0105 | 0.0272 | |
单日型 | 11.6 | 59.4 | 0.23 | 0.0041 | 0.0102 |
Tab.2
Spatial change of precipitation contours in the south and north of Qinling Mountains
降水量 (mm) | 1970—2000年 | 1980—2010年 | 1990—2017年 | 2008—2017年 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
面积占比 | 变化率 | 面积占比 | 变化率 | 面积占比 | 变化率 | 面积占比 | 变化率 | ||||
< 600 | 10.1 | - | 9.9 | -0.2 | 11.3 | 1.4 | 9.1 | -2.2 | |||
600~700 | 13.0 | - | 11.9 | -1.1 | 15.7 | 3.8 | 11.8 | -3.9 | |||
700~800 | 29.9 | - | 29.9 | 0.0 | 29.6 | -0.3 | 18.4 | -11.2 | |||
800~900 | 27.9 | - | 29.8 | 1.9 | 26.0 | -3.8 | 32.1 | 6.1 | |||
900~1000 | 7.6 | - | 7.3 | -0.3 | 6.8 | -0.4 | 13.5 | 6.6 | |||
≥ 1000 | 11.6 | - | 11.3 | -0.3 | 10.6 | -0.7 | 15.2 | 4.6 | |||
极端降水量 (mm) | 1970—2000年 | 1980—2010年 | 1990—2017年 | 2008—2017年 | |||||||
面积占比 | 变化率 | 面积占比 | 变化率 | 面积占比 | 变化率 | 面积占比 | 变化率 | ||||
<400 | 8.3 | - | 7.4 | -0.9 | 9.0 | 1.6 | 5.9 | -3.1 | |||
400~500 | 13.4 | - | 11.6 | -1.8 | 15.6 | 4.0 | 15.0 | -0.6 | |||
500~600 | 38.4 | - | 37.3 | -1.2 | 42.8 | 5.6 | 23.4 | -19.4 | |||
600~700 | 24.2 | - | 28.2 | 4.0 | 18.8 | -9.4 | 34.2 | 15.4 | |||
700~800 | 7.6 | - | 7.3 | -0.3 | 6.8 | -0.5 | 10.8 | 4.0 | |||
≥ 800 | 8.1 | - | 8.3 | 0.1 | 7.0 | -1.3 | 10.7 | 3.7 |
Tab. 3
Correlation analysis between temperature and extreme precipitation in the south and north of Qinling Mountains
类型 | 指标 | 秦岭以北 | 秦岭南坡 | 汉江谷地 | |||||
---|---|---|---|---|---|---|---|---|---|
相关系数 | 显著性 | 相关系数 | 显著性 | 相关系数 | 显著性 | ||||
偏前型 | 极端降水量 | -0.26 | 0.92 | -0.27 | 0.93 | -0.32 | 0.97 | ||
极端降水日数 | -0.47 | 1.00 | -0.46 | 1.00 | -0.57 | 1.00 | |||
极端降水频次 | -0.26 | 0.93 | -0.21 | 0.84 | -0.36 | 0.99 | |||
偏后型 | 极端降水量 | -0.16 | 0.72 | -0.10 | 0.49 | -0.28 | 0.94 | ||
极端降水日数 | -0.28 | 0.95 | -0.33 | 0.98 | -0.43 | 1.00 | |||
极端降水频次 | -0.12 | 0.57 | 0.11 | 0.53 | -0.06 | 0.32 | |||
均衡型 | 极端降水量 | -0.26 | 0.93 | -0.13 | 0.63 | -0.25 | 0.91 | ||
极端降水日数 | -0.34 | 0.98 | -0.23 | 0.89 | -0.37 | 0.99 | |||
极端降水频次 | -0.11 | 0.55 | 0.04 | 0.20 | -0.15 | 0.71 | |||
单日型 | 极端降水量 | 0.41 | 1.00 | 0.45 | 1.00 | 0.52 | 1.00 | ||
极端降水日数 | 0.36 | 0.99 | 0.43 | 1.00 | 0.54 | 1.00 | |||
极端降水频次 | 0.36 | 0.99 | 0.43 | 1.00 | 0.54 | 1.00 |
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