地理科学 ›› 2021, Vol. 41 ›› Issue (12): 2222-2231.doi: 10.13249/j.cnki.sgs.2021.12.016
• • 上一篇
赵东升1(), 张家诚1,2, 邓思琪1,2, 郭彩贇1,2
收稿日期:
2020-11-21
修回日期:
2021-01-20
出版日期:
2021-12-25
发布日期:
2022-02-17
作者简介:
赵东升(1978−),男,黑龙江肇源人,副研究员,主要从事气候变化的影响及适应研究。E-mail: zhaods@igsnrr.ac.cn
基金资助:
Zhao Dongsheng1(), Zhang Jiacheng1,2, Deng Siqi1,2, Guo Caiyun1,2
Received:
2020-11-21
Revised:
2021-01-20
Online:
2021-12-25
Published:
2022-02-17
Supported by:
摘要:
基于 1960—2018 年的逐日降水观测数据,采用日尺度旱涝急转指数(DWAAI)计算方法,以生态地理区为框架,识别并分析了西南地区旱涝急转事件的时空变化特征。结果表明:西南地区旱涝急转事件的发生次数在 1960—2010年有增加趋势,在 2011—2018 年快速减少;旱转涝事件多发生在春夏季(4~8 月),涝转旱事件则跨越了春、夏、秋季(5~11 月);在云南高原常绿阔叶林、松林区(VA5),西双版纳山地季雨林、雨林区(VIIA3),闽粤桂低山平原常绿阔叶林、人工植被区(VIA2),旱涝急转事件主要发生在夏季,而在湘黔高原山地常绿阔叶林区(VA3)和四川盆地常绿阔叶林、人工植被区(VA4),旱涝急转事件主要发生在春季;旱涝急转事件发生次数的空间分布呈现东北多、西南少的格局;2000 年以来旱涝急转事件在滇中南亚高山谷地常绿阔叶林、松林区(VIA3)和闽粤桂低山平原常绿阔叶林、人工植被区(VIA2)发生次数减少,但有加重趋势,呈现极端化特征。
中图分类号:
赵东升, 张家诚, 邓思琪, 郭彩贇. 1960—2018年中国西南地区旱涝急转的时空变化特征[J]. 地理科学, 2021, 41(12): 2222-2231.
Zhao Dongsheng, Zhang Jiacheng, Deng Siqi, Guo Caiyun. Spatio-temporal Characteristics of Drought-flood Abrupt Alternation in the Southwest China from 1960 to 2018[J]. SCIENTIA GEOGRAPHICA SINICA, 2021, 41(12): 2222-2231.
表1
$\alpha $不同取值时$ Turn $的结果
序号 | | 后期与前期 的差值 | | |||||||||
前期 | 后期 | | | | | | | | | | ||
1 | 0.10 | 5.00 | 4.90 | 77.98 | 42.77 | 24.99 | 15.37 | 9.86 | 4.49 | 3.16 | 2.27 | 0.09 |
2 | 0.50 | 8.00 | 7.50 | 424.83 | 156.11 | 63.75 | 28.35 | 13.53 | 3.65 | 2.03 | 1.17 | 0.01 |
3 | −0.50 | 0.50 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
4 | −0.50 | 2.50 | 3.00 | 14.06 | 11.11 | 9.00 | 7.44 | 6.25 | 4.59 | 4.00 | 3.52 | 1.00 |
5 | −1.00 | 2.00 | 3.00 | 11.25 | 10.00 | 9.00 | 8.18 | 7.50 | 6.43 | 6.00 | 5.63 | 3.00 |
6 | −1.50 | 1.50 | 3.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 |
7 | −2.00 | 1.00 | 3.00 | 11.25 | 10.00 | 9.00 | 8.18 | 7.50 | 6.43 | 6.00 | 5.63 | 3.00 |
8 | −2.00 | 2.00 | 4.00 | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 |
9 | −2.00 | 10.00 | 12.00 | 858.31 | 334.52 | 144.00 | 67.18 | 33.49 | 9.76 | 5.62 | 3.35 | 0.02 |
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