主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2025, Vol. 41 ›› Issue (2): 30-36.doi: 10.3969/j.issn.1673-503X.2025.02.004

• 论文 • 上一篇    下一篇

1970—2021年大连市冻土深度变化及其对气候变暖的响应

周龙, 杨佳怡, 宋秀瑜, 宋军, 满永恒   

  1. 大连市气象装备保障中心, 辽宁大连 116201
  • 收稿日期:2023-10-11 修回日期:2024-02-27 出版日期:2025-04-28 发布日期:2025-06-20
  • 通讯作者: 宋军,女,高级工程师,E-mail:henlunna0809@163.com。 E-mail:henlunna0809@163.com
  • 作者简介:周龙,男,1987年生,高级工程师,主要从事综合气象观测相关研究,E-mail:295015571@qq.com。
  • 基金资助:
    大连市科技创新基金项目(2023JJ13FG077)资助。

Changes in frozen soil depth in Dalian city from 1970 to 2021 and its response to climate warming

ZHOU Long, YANG Jiayi, SONG Xiuyu, SONG Jun, MAN Yongheng   

  1. Dalian Meteorological Equipment Support Center, Dalian 116201, China
  • Received:2023-10-11 Revised:2024-02-27 Online:2025-04-28 Published:2025-06-20

摘要: 选用1970年10月至2021年4月大连市6个气象站的冻土观测资料、逐日平均地温、逐日平均气温及极端最低气温等资料,应用小波分析、线性回归分析、M-K检验等方法,分析近51 a大连市最大冻土深度的时空变化特征,并探讨其对气候变暖的响应。结果表明:1970—2021年大连市最大冻土深度的气候倾向率为-6.9 cm/10 a,年平均冻土持续时间为117 d,年变化为减少趋势,气候倾向率为-7.2 d/10 a;冻土开始日期推迟、结束日期提前,平均开始日期和结束日期分别为11月20日和3月18日。冻土最大冻结深度具有4类尺度的周期变化特征,其中以16~26 a的周期变化最显著。相关关系分析表明,近51 a大连市地温、气温、极端最低气温与最大冻土深度均为显著的负相关关系,地温对冻土最大深度的影响最为显著。

关键词: 冻融时间, 冻土最大深度, M-K检验, 小波分析

Abstract: Based on frozen soil observation data,daily average ground temperature,daily average air temperature,and extreme minimum air temperature from six meteorological stations in Dalian city from October 1970 to April 2021,this study analyze the spatiotemporal variation characteristics of maximum frozen soil depth in Dalian over the past 51 years and explore its response to climate warming using wavelet analysis,linear regression analysis,and the Mann-Kendall (M-K) test.The results show that the maximum frozen soil depth was at a climate tendency rate of -6.9 cm/10 a,the average annual duration of frozen soil is 117 days,with a decreasing trend at the climate tendency climate tendency rate of -7.2 days/10 a.The onset of freezing is increasingly delayed,while the end date advances,with the average onset and end dates being November 20 and March 18,respectively.The maximum frozen soil depth exhibited periodic variation characteristics at 4 scales,with the 16-26 year period being the most significant.Correlation analysis reveals that ground temperature,air temperature,and extreme minimum temperature are all significantly negatively correlated with maximum frozen soil depth,with ground temperature exerting the strongest influence.

Key words: Freeze-thaw duration, Maximum frozen soil depth, M-K test, Wavelet analysis

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