Journal of Arid Meteorology ›› 2022, Vol. 40 ›› Issue (6): 1051-1058.DOI: 10.11755/j.issn.1006-7639(2022)-06-1051
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YU Xingzhan1(), PU Yiliang2, KANG Boqian3
Received:
2022-01-21
Revised:
2022-04-28
Online:
2022-12-31
Published:
2023-01-10
作者简介:
余兴湛(1991—),男,工程师,主要从事天气预报及气象服务.E-mail:526996271@qq.com。
基金资助:
CLC Number:
YU Xingzhan, PU Yiliang, KANG Boqian. Spatial-temporal characteristics of drought in recent 50 years in Guangdong Province based on SPEI[J]. Journal of Arid Meteorology, 2022, 40(6): 1051-1058.
余兴湛, 蒲义良, 康伯乾. 基于SPEI的广东省近50 a干旱时空特征[J]. 干旱气象, 2022, 40(6): 1051-1058.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2022)-06-1051
SPEI | 干旱等级 |
---|---|
-1.0 | 轻旱 |
-1.5 | 中旱 |
-2.0 | 重旱 |
SPEI≤-2.0 | 特旱 |
Tab.1 Drought grades classification based on SPEI
SPEI | 干旱等级 |
---|---|
-1.0 | 轻旱 |
-1.5 | 中旱 |
-2.0 | 重旱 |
SPEI≤-2.0 | 特旱 |
Fig.2 Mann-Kendall trend coefficients of SPEI at different time scales (a, b, c, d, e) and inter-annual variation of annual scale SPEI (f) in Guangdong Province during 1971-2020
模态 | 方差贡献率/% | 累计方差贡献率/% |
---|---|---|
EOF1 | 51.62 | 51.62 |
EOF2 | 11.49 | 63.11 |
EOF3 | 6.40 | 69.51 |
EOF4 | 4.36 | 73.87 |
EOF5 | 2.50 | 76.37 |
Tab.2 Contribution rates of the first five modes of EOF decomposition of annual scale SPEI in Guangdong Province during 1971-2020
模态 | 方差贡献率/% | 累计方差贡献率/% |
---|---|---|
EOF1 | 51.62 | 51.62 |
EOF2 | 11.49 | 63.11 |
EOF3 | 6.40 | 69.51 |
EOF4 | 4.36 | 73.87 |
EOF5 | 2.50 | 76.37 |
Fig.4 Spatial distribution of the first three modes (a, c, d) and the time coefficient of the first mode (b) of EOF decomposition of annual scale SPEI in Guangdong Province during 1971-2020
时间系数 | 厄尔尼诺强度指标 | 西太平洋副热带高压指标 | ||||||
---|---|---|---|---|---|---|---|---|
Niño 1+2区 | Niño 3区 | Niño 4区 | Niño 3.4区 | 面积 | 强度 | 脊线位置 | 西伸 脊点 | |
PC1 | 0.33** | 0.24** | 0.02 | 0.18** | 0.05 | 0.06 | -0.04 | -0.04 |
PC2 | 0.09* | 0.03 | -0.03 | -0.01 | 0.13** | 0.12** | 0.04 | 0.11** |
Tab.3 The correlation between time coefficients of EOF1, EOF2 and El Ni?o strength indexes, western Pacific subtropical high (WPSH) indexes
时间系数 | 厄尔尼诺强度指标 | 西太平洋副热带高压指标 | ||||||
---|---|---|---|---|---|---|---|---|
Niño 1+2区 | Niño 3区 | Niño 4区 | Niño 3.4区 | 面积 | 强度 | 脊线位置 | 西伸 脊点 | |
PC1 | 0.33** | 0.24** | 0.02 | 0.18** | 0.05 | 0.06 | -0.04 | -0.04 |
PC2 | 0.09* | 0.03 | -0.03 | -0.01 | 0.13** | 0.12** | 0.04 | 0.11** |
模态分量 | 周期/a | 方差贡献率/% |
---|---|---|
IMF1 | 3.1 | 47.33 |
IMF2 | 7.1 | 20.04 |
IMF3 | 12.5 | 18.07 |
IMF4 | 16.7 | 4.61 |
趋势余量R | 无 | 9.95 |
Tab.4 The period and variance contribution rate of each modal component of ESMD decomposition of annual scale SPEI in Guangdong Province during 1971-2020
模态分量 | 周期/a | 方差贡献率/% |
---|---|---|
IMF1 | 3.1 | 47.33 |
IMF2 | 7.1 | 20.04 |
IMF3 | 12.5 | 18.07 |
IMF4 | 16.7 | 4.61 |
趋势余量R | 无 | 9.95 |
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