长江科学院院报 ›› 2021, Vol. 38 ›› Issue (1): 20-26.DOI: 10.11988/ckyyb.20191247

• 水资源与环境 • 上一篇    下一篇

1969—2018年青海省生长季降水时空变化特征

张博1, 周伟1,2   

  1. 1.中国地质大学(北京) 土地科学技术学院,北京 100083;
    2.自然资源部土地整治重点实验室,北京 100035
  • 收稿日期:2019-10-15 修回日期:2020-03-02 出版日期:2021-01-01 发布日期:2021-01-27
  • 通讯作者: 周 伟(1974-),男,甘肃白银人,教授,博士,博士生导师,主要从事土地利用工程与资源环境遥感研究。E-mail: zhouw@cugb.edu.cn
  • 作者简介:张 博(1995-),男,甘肃天水人,硕士研究生,从事土地退化和气候变化研究。E-mail:2022824979@qq.com
  • 基金资助:
    国家重点研发计划项目 (2017YFF0206801)

Temporal and Spatial Variation Characteristics of Precipitation in the Growing Season of Qinghai Province from 1969 to 2018

ZHANG Bo1, ZHOU Wei1,2   

  1. 1. School of Land Science and Technology, China University of Geosciences, Beijing 100083, China;
    2. Key Laboratory of Consolidation and Rehabilitation, Ministry of Natural Resources,Beijing 100035, China
  • Received:2019-10-15 Revised:2020-03-02 Published:2021-01-01 Online:2021-01-27

摘要: 降水量的变化情况一直是气候问题的讨论焦点。使用1969—2018年青海省生长季(5—9月份)降水量数据,借助ANUSPLIN插值、Mann-Kendall检验、小波分析等方法,研究青海省近50 a生长季降水量变化特点。结果显示:①50 a间降水量总体趋势为增加,倾斜率为2.12 mm/a,变化周期主要有22、8、4 a三个尺度,突变点为1974年、1986年、1997年、2008年,其中1986年和2008年由丰变枯,1974年和1997年由枯变丰。预测2019—2020年会出现降水量从枯到丰的转变,降水量的变化趋势也将表现为增加。②空间变化特征显示青海省生长季降水量仍然保持增加,通过转变节点划分阶段,1969—1986年间青海省南部降水增加趋势明显,1986—2008年间高海拔地区降水增加趋势强度大,2008—2018年间正处在降水枯期,降水量表现为一定的减少趋势。

关键词: 降水, 时空变化, 趋势分析, 小波分析, ANUSPLIN插值, 生长季, 青海省

Abstract: The trend of precipitation has always been a hotspot of global climate change research.The characteristics of precipitation in growing season (from May to September) in Qinghai Province are analyzed via ANUSPLIN interpolation, Mann-Kendall test, and wavelet analysis based on the measured values of precipitation of weather stations from 1969 to 2018. Results demonstrate that: (1) Precipitation from 1969 to 2018 displayed an overall growth trend with a slope rate of 2.12 mm/a and three change cycles, namely 22 a, 8 a and 4 a. Abrupt changes occurred in 1974, 1986, 1997 and 2008, among which 1986 and 2008 witnessed a declining of precipitation while 1974 and 1997 an increment. It is expected that a transition of increasing precipitation will happen from 2019 to 2020. (2) In terms of spatial scale, precipitation in the growing season of Qinghai Province also showed an increasing trend. From 1969 to 1986, precipitation rose evidently in the south of Qinghai, while from 1986 to 2008, precipitation augmented intensively in high-altitude areas, and from 2008 to 2018, which is a dry period, the precipitation underwent reductions.

Key words: precipitation, temporal and spatial changes, trend analysis, wavelet analysis, ANUSPLIN interpolation, growing season, Qinghai

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