中国东北兴安岭地区年冻融频次的分布规律  

Distribution law of annual freeze-thaw frequency in Xing’anling region of Northeast China

作　　者：魏豪 张泽 Andrey MELNIKOV[4] 金豆豆 高思如 冯文杰 WEI Hao;ZHANG Ze;Andrey MELNIKOV;JIN Doudou;GAO Siru;FENG Wenjie(State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;School of Civil Engineering/Institute of Cold Regions Science and Technology,Northeast Forestry University,Harbin 150040,China;Northeast-China Observatory and Research-Station of Permafrost Geo-Environment of the Ministry of Education/Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China(CIC-PERCM),Northeast Forestry University,Harbin 150040,China;Melnikov Permafrost Institute,Siberian Branch,Russian Academy of Sciences,Yakutsk 117997,Russia;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000 [2]东北林业大学土木工程学院/寒区科学与工程研究院,黑龙江哈尔滨150040 [3]东北林业大学东北多年冻土区地质环境系统教育部野外科学观测研究站/东北多年冻土区环境、道路建设与养护协同创新中心,黑龙江哈尔滨150040 [4]俄罗斯科学院西伯利亚分院梅尔尼科夫冻土研究所,俄罗斯联邦雅库茨克117997 [5]中国科学院大学,北京100049

出　　处：《冰川冻土》2022年第2期415-426,共12页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金委员会(NSFC)与俄罗斯基础研究基金会(RFBR)合作交流项目(42011530083);国家自然科学基金项目(41771078,41871061,41601073);中国地质调查局发展研究中心项目“找矿哲学研究”(D219043);高端外国专家引进计划项目(G2021131003L)资助。

摘　　要：冻融循环是影响寒区工程和环境变化的重要因素之一,而年冻融频次(冻融循环的年累计量)是可以直接标定冻融循环对寒区工程和环境造成影响大小的物理量,对寒区环境下年冻融频次的调查有重要意义。以中国东北兴安岭地区为研究对象,选取兴安岭地区18个气象站点1990—2017年地表温度数据进行整理,得出兴安岭地区各个站点的年冻融频次,并在空间分布和时间序列上分析了年冻融频次的变化情况。结果表明:年冻融频次在中国东北兴安岭地区随着纬度增加逐渐增多,随着经度的增加逐渐减少,随着海拔升高而逐渐增多,且均具有良好的线性趋势;年冻融频次在1990—2017年呈明显的减少趋势,在2004年前后发生突变。进一步分析发现,在影响年冻融频次空间分布的3个因素中,经纬度影响较大,海拔影响相对较小;在时间上年冻融频次变化与东北地区NDVI变化情况呈现良好的负相关性,表明年冻融频次在一定程度上与当地植被覆盖度有关,且随植被覆盖度的增加而减少。Freeze-thaw cycle is one of the important factors affecting rock strength and environment change in cold region engineering.Annual freeze-thaw frequency,namely the annual accumulated amount of freeze-thaw cycle,can directly determine the impact of freeze-thaw cycle on cold region engineering and environment.Thus,it has a great significance to investigate annual freeze-thaw frequency in cold region.Xing’anling(Khingan)region has the largest intact primeval forest in China,with a forest coverage rate of 80.95%.The region covers northern part of Heilongjiang Province and northeast part of Inner Mongolia Autonomous Region.It belongs to the temperate continental monsoon climate,and due to the high latitude,there is seasonally frozen soil,island permafrost and discontinuous permafrost.In this paper,Xing’anling region of Northeast China is taken as the research object,and surface temperature data of 18 meteorological stations in Xing’anling region in the past 30 years from 1990 to 2017 are selected for collation,and annual freeze-thaw frequency of each station is obtained.Then,the variation of annual freeze-thaw frequency of each station is studied and analyzed in spatial distribution and time series.The results show that annual freeze-thaw frequency increases with the increase of latitude,decreases with the increase of longitude,and increases with the increase of altitude in Xing’anling region of Northeast China,and all have good linear trend.In the long-term dimension,annual freeze-thaw frequency showed an obvious downward trend from 1990 to 2017,and a sudden change occurred around 2004.Further analysis shows that among the three factors affecting the spatial distribution of annual freeze-thaw frequency,latitude and longitude have a greater influence,while altitude has a relatively small influence.There was a good negative correlation between annual freeze-thaw frequency and NDVI in Xing’anling region of Northeast China,indicating that annual freeze-thaw frequency was related to local vegetation coverage to

关 键 词：年冻融频次 兴安岭 中国东北 经度 纬度 海拔 

分 类 号：P642.14[天文地球—工程地质学]