Journal of Arid Meteorology ›› 2022, Vol. 40 ›› Issue (2): 202-211.DOI: 10.11755/j.issn.1006-7639(2022)-02-0202
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XU Weiping1,2(), MENG Xiangxin1,2(), GU Weizong1,3, BO Zhongkai1,2
Received:
2021-08-03
Revised:
2021-12-13
Online:
2022-04-30
Published:
2022-05-10
Contact:
MENG Xiangxin
徐玮平1,2(), 孟祥新1,2(), 顾伟宗1,3, 伯忠凯1,2
通讯作者:
孟祥新
作者简介:
徐玮平(1990— ),男,内蒙古呼和浩特人,工程师,主要从事极端气候与短期气候预测研究. E-mail: 245332105@qq.com。
基金资助:
CLC Number:
XU Weiping, MENG Xiangxin, GU Weizong, BO Zhongkai. Relationship between extremely low temperature in spring in Shandong Province and North Atlantic SST in preceding winter[J]. Journal of Arid Meteorology, 2022, 40(2): 202-211.
徐玮平, 孟祥新, 顾伟宗, 伯忠凯. 山东春季极端低温与前冬北大西洋海温的关系[J]. 干旱气象, 2022, 40(2): 202-211.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2022)-02-0202
序号 | 代码 | 中文名称 | 定 义 | 单位 |
---|---|---|---|---|
1 | TNn | 极端最低气温 | 月内日最低气温的最小值 | ℃ |
2 | TN10P | 冷夜日数 | 日最低气温<10%分位数日数 | d |
Tab.1 Definition of extremely low temperature index
序号 | 代码 | 中文名称 | 定 义 | 单位 |
---|---|---|---|---|
1 | TNn | 极端最低气温 | 月内日最低气温的最小值 | ℃ |
2 | TN10P | 冷夜日数 | 日最低气温<10%分位数日数 | d |
Fig.2 Spatial distribution of extremely minimum temperature (a, Unit: ℃), cold night (b) and extremely low temperature event (c) occurrence frequency (Unit: %) in spring in Shandong
Fig.3 The standardized anomaly of cold night (a) and extremely low temperature events (b) regional average occurrence frequency in spring in Shandong from 1961 to 2018 and their 9-year moving average
IMF分量 | 周期/a | 方差贡献率/% |
---|---|---|
IMF1 | 3 | 39.6 |
IMF2 | 6 | 15.0 |
IMF3 | 19 | 6.4 |
IMF4 | 29 | 8.5 |
Tab.2 The period and variance contribution rate of IMF components of occurrence frequency series of extremely low temperature event in spring in Shandong
IMF分量 | 周期/a | 方差贡献率/% |
---|---|---|
IMF1 | 3 | 39.6 |
IMF2 | 6 | 15.0 |
IMF3 | 19 | 6.4 |
IMF4 | 29 | 8.5 |
Fig.5 Significance test of IMF components of the occurrence frequency series of extremely low temperature events in spring in Shandong from 1961 to 2018 based on EEMD
Fig.7 The composite of anomaly field (color shaded areas) and climatic state (isoline) of 500 hPa geopotential height in the typical extreme low temperature years in spring in Shandong (Unit: dagpm)
Fig.8 Regression of the 500 hPa geopotential height anomaly field (a, Unit: dagpm) and 850 hPa temperature anomaly field (b, Unit: ℃) on occurrence frequency series of extremely low temperature events in spring in Shandong from 1979 to 2018 (the dotted areas passing the 0.1 significance test (the same as below); the rectangle with fine line for location of Shandong to the east of 114°E (the same as below))
Fig.9 The composites of horizontal components of wave activity flux at 200 hPa (arrow, Unit: m2·s2) and its divergence (color shaded area, Units: 10-5 m·s-2) (a) and vertical components of wave activity flux at 500 hPa (b, color shaded area, Unit: m2·s2) over the North Atlantic and Eurasia in the typical extreme low temperature years in spring in Shandong (the rectangle with thick line for key area (the same as below))
Fig.10 Regression of the North Atlantic SST anomaly field in preceding winter on occurrence frequency series of extremely low temperature events in spring in Shandong from 1979 to 2018 (Unit: ℃)
Fig.11 The spatial patterns (a, b) and time coefficients (c, d) of the first (a, c) and second (b, d) modes of EOF analysis of standardized anomaly field of North Atlantic SST in the preceding winter during 1979-2018
Fig.12 The inter-annual variation of standardized anomaly of occurrence frequency of extremely low temperature events in spring in Shandong and PC1 (a), PC2 (b) during 1979-2018
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