大理大学学报 ›› 2023, Vol. 8 ›› Issue (6): 52-60.

• 物理学 • 上一篇    下一篇

19592015年云南省极端气候指数的时空变化特征分析

朱展鹏,李忠木*   

  1. 大理大学天文研究所,云南大理 671003
  • 收稿日期:2022-11-16 修回日期:2022-11-18 出版日期:2023-06-15 发布日期:2023-07-05
  • 通讯作者: 李忠木,教授,博士,E-mail:zhongmuli@126.com。
  • 作者简介:朱展鹏,硕士研究生,主要从事气候大数据研究。
  • 基金资助:

    云南省汪景琇院士工作站(202005AF150025);云南省教育厅科学研究基金项目(2022Y869

Analysis of Spatiotemporal Variation Characteristics of Extreme Climate Index in Yunnan Province from 1959 to 2015

Zhu Zhanpeng Li Zhongmu*   

  1. Institute of Astronomy Dali University Dali Yunnan 671003 China
  • Received:2022-11-16 Revised:2022-11-18 Online:2023-06-15 Published:2023-07-05

摘要:

随着温室气体浓度升高,极端气候事件问题愈发突出。高原和山地是气候变化的敏感和脆弱区域。基于云南省116个气象站点逐日气温和降水序列资料,采用Mann-Kendall检验和Sen斜率估计分析19592015年云南省极端气候指数的时空变化特征。结果表明:9个极端气温指数均呈显著变化,极端暖指数显著上升,极端冷指数显著下降。滇西北及滇中地区霜日日数(FD)下降速率显著高于其他地区;红河州中部和普洱市西部多个极端气温指数变化速率明显高于其他地区。8个极端降水指数中仅连续湿日数(CWD)通过0.05显著性检验,其余指数变化均不显著。年总降水量减少,强降水量(R95pTOT)和极强降水量(R99pTOT)增加,降水更加趋向集中爆发。在空间变化上一致性较低,多数站点没有明显趋势。红河州中部、普洱市西部和德宏州西南部多个极端降水指数显著下降,这些地区干旱趋势明显。

关键词: font-family:宋体, ">极端气候指数, 时空变化特征, 云南省

Abstract:

With the increase in greenhouse gas concentrations extreme climate events have become increasingly prominent. Plateau and mountainous areas are sensitive and fragile regions affected by climate change. Based on the daily temperature and precipitation data of 116 meteorological stations in Yunnan Province the Mann-Kendall test and Sen slope estimation were used to analyze the spatiotemporal variation characteristics of extreme climate indexes in Yunnan Province from 1959 to 2015. The results showed that all nine extreme temperature indexes had significantly changed with extreme warm indexes showing a significant increase and extreme cold indexes showing a significant decrease. The decline rate of frost days FD in northwest and central Yunnan was significantly higher than other areas and multiple extreme temperature indexes in the central part of Honghe Prefecture and the western part of Pu'er City showed a higher rate of change than other areas. Only the consecutive wet days CWD index among the eight extreme precipitation indexes passed the significance test at the level of 0.05 and the changes in the other indexes were not significant. The total annual precipitation decreased while the amount of intense precipitation R95pTOT and extremely intense precipitation R99pTOT increased indicating a trend towards more concentrated and intense precipitation. There was low consistency in spatial variation and most stations did not show significant trends. Multiple extreme precipitation indexes in the central part of Honghe Prefecture the western part of Pu'er City and the southwestern part of Dehong Prefecture showed significant decrease indicating a trend toward drought in these regions.

Key words: font-family:", ">extreme climate indexfont-family:宋体, ">, font-family:", ">spatiotemporal variation characteristicsfont-family:宋体, ">, font-family:", "> Yunnan Province

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