ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost ground temperature for the Northern Hemisphere, v2.0

This dataset contains permafrost ground temperature data produced as part of the European Space Agency's (ESA) Climate Change Initiative (CCI) Permafrost project. It forms part of the first version of their Climate Research Data Package (CRDP v1). It is derived from a thermal model driven and constrained by satellite data. Grid products of CDRP v1 are released in annual files, covering the start to the end of the Julian year. This corresponds to average annual ground temperatures and is provided for specific depths (surface, 1m, 2m, 5m , 10m). Case A: It covers the Northern Hemisphere (north of 30°) for the period 2003-2017 based on MODIS Land Surface temperature merged with downscaled ERA5 reanalysis near-surface air temperature data. Case B: It covers the Northern Hemisphere (north of 30°) for the period 1997-2002 based on downscaled ERA5 reanalysis near-surface air temperature data which are bias-corrected with the Case A product for the overlap period 2003-2018 using a pixel-specific statistics for each day of the year.

本数据集收录多年冻土地面温度数据，系欧洲空间局（ESA）气候变化倡议（CCI）多年冻土项目的产出成果，属于其《气候研究数据包第一版》（CRDP v1）的组成部分。该数据集源自一套由卫星数据驱动并加以约束的热模型。CRDP v1的格网产品以年度文件形式发布，覆盖儒略年的完整时段，提供对应特定深度（地表、1米、2米、5米、10米）的年均地面温度数据。案例A：数据集覆盖2003-2017年期间北纬30°以北的北半球区域，其数据基于中分辨率成像光谱仪（MODIS）地表温度产品与降尺度后的ERA5再分析近地表气温数据融合得到。案例B：数据集覆盖1997-2002年期间北纬30°以北的北半球区域，所用降尺度ERA5再分析近地表气温数据，通过针对年中每日逐像素的统计方法，以2003-2018年重叠时段的案例A产品为基准进行偏差校正。

搜集汇总

背景与挑战

背景概述

该数据集提供了北半球(north of 30°)1997-2017年间的永久冻土地面温度数据，包含不同深度的平均年度温度测量。数据来源于卫星观测和再分析数据的融合，采用热模型计算生成，是研究气候变化对永久冻土影响的重要资源。