中蒙俄经济走廊气候背景及变化数据集（V1.0）（1981-2019）

在全球增暖的背景下，中蒙俄经济走廊面临的安全问题十分突出，主要表现为冻土层退化和土地沙漠化问题日趋严重。冻土退化使中蒙俄交通管线沿线区域泥石流、水毁、冰雪害等灾害频发，同时引起水土流失，进而造成冻土管道露管等严重问题。沙漠化则使研究区生态环境更为脆弱，水土流失、沙尘暴等复合危害频繁发生。因此，本数据集将为中蒙俄经济走廊气候变化及其对冻土、沙漠化等影响研究提供基础气候数据。数据选取了ERA5气候再分析数据的陆地表面气候再分析数据集（ERA5-Land）（来源：https://cds.climate.copernicus.eu）。本数据集采用反距离权重（IDW）法对原始数据进行插值，使其空间分辨率达到10km。基于该数据集，可得到过去40年中蒙俄经济走廊区气候要素时空分布格局。

Against the backdrop of global warming, security issues faced by the China-Mongolia-Russia Economic Corridor (CMREC) are highly prominent, mainly manifested as the increasingly severe permafrost degradation and land desertification. Permafrost degradation causes frequent disasters such as debris flows, water damage, snow and ice disasters in the areas along the traffic and pipeline corridors of the CMREC, while also triggering soil erosion, which further leads to serious problems such as exposed permafrost pipelines. Desertification renders the ecological environment of the study area more fragile, with frequent combined hazards including soil erosion and sandstorms. Therefore, this dataset will provide basic climatic data for studies on climate change in the CMREC and its impacts on permafrost, desertification and other related aspects. The dataset adopts the Land Surface Climate Reanalysis Dataset (ERA5-Land) from the ERA5 climate reanalysis data (source: https://cds.climate.copernicus.eu). This dataset uses the Inverse Distance Weighting (IDW) method to interpolate the original data, so that its spatial resolution reaches 10 km. Based on this dataset, the temporal and spatial distribution patterns of climatic factors in the CMREC over the past 40 years can be derived.