Journal of Arid Meteorology ›› 2023, Vol. 41 ›› Issue (2): 241-250.DOI: 10.11755/j.issn.1006-7639(2023)-02-0241
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CAI Yiheng1,2(), LI Shuai3(
), ZHANG Qiang4, DENG Biao1,2, LUO Yu1,2, SUN Rui1,2
Received:
2022-11-30
Revised:
2023-01-17
Online:
2023-04-30
Published:
2023-05-09
蔡怡亨1,2(), 李帅3(
), 张强4, 邓彪1,2, 罗玉1,2, 孙蕊1,2
通讯作者:
李帅(1987—),男,高级工程师,主要从事水文水资源管理和研究。E-mail:li_shuai@ctg.com.cn。
作者简介:
蔡怡亨(1995—),男,助理工程师,主要从事气候与气候变化研究。E-mail:1952943140@qq.com。
基金资助:
CLC Number:
CAI Yiheng, LI Shuai, ZHANG Qiang, DENG Biao, LUO Yu, SUN Rui. Spatio-temporal variation of drought in Sichuan Province from 1997 to 2021[J]. Journal of Arid Meteorology, 2023, 41(2): 241-250.
蔡怡亨, 李帅, 张强, 邓彪, 罗玉, 孙蕊. 1997—2021年四川省干旱时空变化特征分析[J]. 干旱气象, 2023, 41(2): 241-250.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2023)-02-0241
起止年 | 相邻站点数阈值 | 第p个百分位 |
---|---|---|
1997—2008 | 15 | 15 |
2009—2015 | 25 | 15 |
2016—2021 | 35 | 14 |
Tab.1 The threshold of the number of neighbor stations and percentile of meteorological drought threshold of regional drought processes in Sichuan Province
起止年 | 相邻站点数阈值 | 第p个百分位 |
---|---|---|
1997—2008 | 15 | 15 |
2009—2015 | 25 | 15 |
2016—2021 | 35 | 14 |
Fig.3 Variations of annual accumulated number of stations with persistent drought and annual drought disaster area in Sichuan Province from 1997 to 2021
Fig.4 The frequency distribution of regional drought process characteristic variables in Sichuan Province from 1997 to 2021 (a) durative day,(b) average intensity,(c) average influential area,(d) comprehensive intensity index
排位 | D/d(过程) | Aa/站(过程) | Ia(过程) | Z(过程) |
---|---|---|---|---|
1 | 201 (1997-07-18至1998-02-03) | 83.62 (2012-12-21至2013-04-04) | -2.30 (1997-01-01至1997-01-22) | 0.60 (2012-12-21至2013-04-04) |
2 | 136 (2000-12-19至2001-05-03) | 70.60 (2009-02-04至2009-02-28) | -2.23 (2009-11-01至2009-12-12) | 0.48 (1997-07-18至1998-02-03) |
3 | 130 (2011-08-09至2011-12-16) | 70.02 (2002-08-29至2002-10-18) | -2.20 (2010-01-02至2010-02-17) | 0.43 (2006-06-10至2006-10-04) |
4 | 117 (2006-06-10至2006-10-04) | 65.45 (2010-01-02至2010-02-17) | -2.15 (2011-08-09至2011-12-16) | 0.43 (2011-08-09至2011-12-16) |
5 | 105 (2012-12-21至2013-4-4) | 60.81 (1997-07-18至1998-02-03) | -2.15 (1998-11-01至1998-12-09) | 0.41 (1999-01-11至1999-04-24) |
Tab.2 Regional drought processes with the top 5 characteristic variable and comprehensive intensity index (Z) in Sichuan Province from 1997 to 2021
排位 | D/d(过程) | Aa/站(过程) | Ia(过程) | Z(过程) |
---|---|---|---|---|
1 | 201 (1997-07-18至1998-02-03) | 83.62 (2012-12-21至2013-04-04) | -2.30 (1997-01-01至1997-01-22) | 0.60 (2012-12-21至2013-04-04) |
2 | 136 (2000-12-19至2001-05-03) | 70.60 (2009-02-04至2009-02-28) | -2.23 (2009-11-01至2009-12-12) | 0.48 (1997-07-18至1998-02-03) |
3 | 130 (2011-08-09至2011-12-16) | 70.02 (2002-08-29至2002-10-18) | -2.20 (2010-01-02至2010-02-17) | 0.43 (2006-06-10至2006-10-04) |
4 | 117 (2006-06-10至2006-10-04) | 65.45 (2010-01-02至2010-02-17) | -2.15 (2011-08-09至2011-12-16) | 0.43 (2011-08-09至2011-12-16) |
5 | 105 (2012-12-21至2013-4-4) | 60.81 (1997-07-18至1998-02-03) | -2.15 (1998-11-01至1998-12-09) | 0.41 (1999-01-11至1999-04-24) |
Fig.5 The distribution of each characteristic variable of 51 regional drought processes in Sichuan Province from 1997 to 2021 (a) durative day,(b) average intensity,(c) average influential area,(d) comprehensive intensity index
Fig.7 The spatial patterns (a, b) and time coefficients (c, d) of the first (a, c) and second (b, d) modes of annual accumulated MCIm anomaly decomposed by EOF in Sichuan Province from 1997 to 2021
Fig.10 The real part of the wavelet coefficients of annual accumulated MCIm in six drought climatic areas in Sichuan Province from 1997 to 2021 (The thick black contour designates critical value at the 0.050 significance level, and the cone of influence (COI) where edge effects might distort the picture is shown as a light contour)
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