过去2000年北半球代表性冰川变化数据集研发

Dataset of Glaciers Changes in the Northern Hemisphere in the Past 2000 Years

全球气候波动显著影响冰川变化。作为气候变化的记录器,冰川变化反映了全球百年、千年乃至更长时间尺度上的气候变化。因此,冰川变化数据集的研制对研究气候变化具有重要意义。北半球冰川分布范围较广,主要分布在青藏高原、阿尔卑斯山、格陵兰、阿拉斯加等地。本数据集基于温度或温度与降水量耦合关系、冰芯包裹气体氧同位素记录、“冰-湖”联动系统等方法,构建了过去2,000年北半球代表性冰川变化数据集。数据时间分辨率为年,数据存储为.shp、docx和.xlsx格式,由10个数据文件组成,数据量为136 KB(压缩为1个文件87.6 KB)。结果显示,受气候变化的影响,北半球不同地区冰川在过去2,000年不同时段均出现了若干次冰川前进和退缩的现象,但近几十年来总体呈现加剧退缩的趋势。

Global climate change has a significant impact on the glacier.Glaciers record the climate change in the global on a century,millennium,and even longer time scales,which is of great significance to the study of climate change.Glaciers in the northern hemisphere cover a large area and are mainly distributed in the Tibetan Plateau,the Alps,Greenland,Alaska,and other places.The dataset of glaciers changes in the northern hemisphere in the past 2,000 years was reconstructed based on temperature or the coupling relationship between temperature and precipitation,oxygen isotopes in air bubblies of ice core,and the linkage of“glacier-lake”.The temporal resolution of the data is one year.The dataset is archived in.shp,.docx,and.xlsx data formats,and consists of 10 data files with a data size of 136 KB(Compressed into one single file with 87.6 KB).The results show that under the influence of climate change,glaciers in different regions of the northern hemisphere have experienced advanced or retreated in different periods in the past 2,000 years.On the whole,however,it shows that all glaciers have had a retreat trend during the last several decades.