XUE Yuan,MAO Wenshu,ZHANG Hanbin,et al.Characteristics of the Precipitation Changes in the Rainy Season in the Yunnan-Guizhou Plateau[J].Journal of Chengdu University of Information Technology,2020,35(05):566-572.[doi:10.16836/j.cnki.jcuit.2020.05.015]
云贵高原雨季降水变化特征
- Title:
- Characteristics of the Precipitation Changes in the Rainy Season in the Yunnan-Guizhou Plateau
- 文章编号:
- 2096-1618(2020)05-0566-07
- Keywords:
- atmospheric science; meteorology; the Yunnan-Guizhou Plateau; rainy season precipitation; EOF; Morlet wavelet analysis
- 分类号:
- P426.62+3
- 文献标志码:
- A
- 摘要:
- 为对云贵高原雨季降水的时空变化特征进行分析,利用云贵高原68个站点1962-2017年5-10月逐日降水量资料,并采用一元线性回归、EOF分解以及Morlet小波法等多种方法。研究结果表明:云贵高原雨季平均降水量的空间分布呈西北部向东部和南部递增。EOF分解得到,云贵高原雨季降水分布呈现为全局一致性和东北-西南差异型,降水量逐旬变化呈现单峰型,月降水量整体呈东北向西南递增的分布,高值区位于云贵高原的东南部和西南部。近56年来,云贵高原雨季降水量和降水日数呈现波动减少趋势,高原东部的雨季降水量呈现增长趋势。大雨日数呈现减少趋势,暴雨日数呈现增长趋势。雨季降水量存在着28年的显著振荡周期和15年、10年次振荡周期。
- Abstract:
- In order to analyze the Temporal and spatial characteristics of the precipitation in the rainy season in the Yunnan-Guizhou Plateau, we have used the daily average precipitation of 68 stations in the Yunnan-Guizhou Plateau from May to October from 1962 to 2017 and a variety of climate statistical methods such as univariate linear regression, EOF decomposition, Morlet wavelet method and so on. The results show that: The spatial distribution of the average precipitation has an increasing trend during the rainy season in the Yunnan-Guizhou Plateau increases from the northwest to the east and south. According to EOF, the spatial distribution of precipitation has two typical models:the whole region version or Northeast-Southwest difference version. During the rainy season, the monthly variation precipitation of the Yunnan-Guizhou Plateau has a single peak. The distribution of monthly precipitation has been demonstrated to increase from northeast to southwest, the high-value area is located in the southeast and southwest of the Yunnan-Guizhou plateau. In the past 56 years, the overall precipitation and precipitation days shows a decreasing trend of volatility, only the precipitation in the rainy season in the eastern part of the plateau shows an increasing trend. The number of heavy rain days on the Yunnan-Guizhou Plateau shows a decreasing trend, while the number of rainstorm days shows an increasing trend. Precipitation in the rainy season has significant oscillation periods of 28 years and 15-year,10-year oscillation periods.
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备注/Memo
收稿日期:2019-11-02
基金项目:国家自然科学基金资助项目(41605082); 国家自然科学基金资助项目(41775079)