摘要
全球气候变暖对冰雪覆盖的显著影响亟待量化研究。基于国际全球导航卫星系统服务数据,利用全天候、高时空分辨率的全球导航卫星系统反射(Global Navigation Satellite System-Reflection, GNSS-R)技术,分析加拿大西北部地区近10年雪深变化及其与气象参数的关系。通过线性趋势和相关性分析发现:年平均温度和积雪天数的拟合后相关系数为0.254 7;加拿大西北部地区积雪天数大致在160~280 d之间,平均积雪天数为218 d,呈轻微减小趋势;年最大积雪深度和年平均温度的相关系数为0.546 9,年最大积雪深度大致在0.7~1 m之间变化,也呈轻微减小趋势,这可能与全球气候异常和全球气候变暖导致的气温升高有关。
The significant impact of global warming on snow and ice cover urgently requires quantitative research.Based on the data from the International Global Navigation Satellite System Service,the Global Navigation Satellite System-Reflection(GNSS-R)technology,which offers all-weather and high spatio-temporal resolution capabilities,is utilized to analyze the snow depth changes in northwestern Canada over the past decade and their relationships with meteorological parameters.Through linear trend and correlation analysis,it is found that:the correlation coefficient between the annual average temperature and the number of snow-covered days after fitting is 0.2547;the number of snow-covered days in northwestern Canada is approximately between 160 and 280 days,with an average of 218 days,showing a slight decreasing trend;the correlation coefficient between the maximum annual snow depth and the annual average temperature is 0.5469,and the maximum annual snow depth varies approximately between 0.7 and 1 m,also showing a slight decreasing trend,which may be related to the temperature increase caused by global climate anomalies and global warming.
作者
郭恩泽
孙志芸
吴海宾
刘文凯
郑嘉豪
陈晓
陈军
GUO En-ze;SUN Zhi-yun;WU Hai-bin;LIU Wen-kai;ZHENG Jia-hao;CHEN Xiao;CHEN Jun(College of Geography and Oceanography,Minjiang University,Fuzhou Fujian 350108,China;College of Geological Engineering and Geomatics,Chang'an University,Xi'an Shaanxi 710054,China)
出处
《现代测绘》
2025年第4期14-20,共7页
Modern Surveying and Mapping
基金
发树慈善基金会捐赠资金研究专项(理工科类一般项目)。
