Data asssociated with manuscript entitled as "Constrained simulation of permafrost thermal changes from 1980 to 2018 on the Qinghai-Tibet Plateau"

Constrained simulation of permafrost thermal changes from 1980 to 2018 on the Qinghai-Tibet PlateauHailong Ji1, Zhuotong Nan1,2*, Xiaobo Wu31 Key Laboratory of Ministry of Education on Virtual Geographic Environment, Nanjing Normal University, Nanjing, 210023, China2 Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China3 College of Resources, Sichuan Agricultural University, Chengdu, 611130, China*Correspondent author: Zhuotong Nan, [e-mail]<br><br>This is a brief introduction to the experimental data involved in the manuscript titled "Constrained Simulation of Permafrost Thermal Changes from 1980 to 2018 on the Qinghai-Tibet Plateau". The data files are named according to their corresponding content and numbered based on their order of appearance in the manuscript for easy reference.<br>1. Data of parameter sensitivity ranking.xlsx The parameter rankings for sensitivity (IVARS50) for three sites (TGL, WQ, GZ), three depth layers (TOP, MID, BOT), and two variables (ST, SM) are stored in the Rank_Matrix Sheet. The final rankings are stored in the Rank_Final Sheet.<br>2. Data of objective function iteration.xlsx Iterations in the objective function during three parameter calibration experiments are stored in the CaliTGL, CaliTSH, and CaliMAP Sheets, respectively. For each Sheet, "ID" represents the iteration number, "NSE" or "Kappa" represents the corresponding objective function value, "Best" indicates the current best objective function value, "ID-Ens" denotes the iteration number corresponding to the 13 sets selected for parameter-ensemble simulation, and "ID-Default" denotes the iteration number corresponding to the default parameters.<br>3. Data of spatial validation ranking.xlsx Results of independent spatial validation for four experiments (annual means and change rates of ALT, TTOP, and GT10m), with RMSE sorted by site/survey area.<br>4. Data of spatial validation for CaliMAP.xlsx Detailed results of independent spatial validation for the CaliMAP experiment, where the observations sourced from Zhao et al., 2021 (https://doi.org/10.5194/essd-13-4207-2021)<br>5. Data of permafrost area voting.xlsx Cell-by-cell permafrost type changes (permafrost versus seasonally frozen ground) based on the CaliMAP experiment, derived from 13 ensemble simulation voting.<br>6. Data of ALT trend.xlsx Cell-by-cell ALT trends and their p-values based on the CaliMAP experiment.<br>7. Data of TTOP trend.xlsx Cell-by-cell TTOP trends and their p-values based on the CaliMAP experiment.<br>8. Data of DZAA trend.xlsx Cell-by-cell DZAA trends and their p-values based on the CaliMAP experiment.<br>9. Data of MAGT trend.xlsx Cell-by-cell MAGT trends and their p-values based on the CaliMAP experiment.<br>10. Data of permafrost variables time series.xlsx Time series of permafrost area, seasonally frozen ground area, and ALT, TTOP, DZAA, and MAGT based on the CaliMAP experiment. Note, the permafrost area were calculated under an area-equal projection after excluding glacier and lake area.<br>11. Data of discrepancies of site-based calibrations.xlsx Percentage discrepancies in permafrost area, ALT, TTOP, and DZAA in 2010 and phased trends of CaliFree, CaliTGL, and CaliTSH, compared to the CaliMAP simulations.

本数据集为学术论文《1980-2018年青藏高原多年冻土热变化约束模拟》的配套实验数据。作者：季海龙1，南卓铜1,2*，吴小波3。单位：1 南京师范大学虚拟地理环境教育部重点实验室，南京 210023，中国；2 江苏省地理信息资源开发与应用协同创新中心，南京 210023，中国；3 四川农业大学资源学院，成都 611130，中国；*通讯作者：南卓铜，[e-mail]。

所有数据文件按其对应内容命名，并依据在论文中出现的顺序编号，便于检索引用。具体数据说明如下：
1. 参数敏感性排序数据.xlsx：该文件的Rank_Matrix工作表存储了3个站点（TGL、WQ、GZ）、3个深度层（TOP、MID、BOT）以及2个变量（ST、SM）对应的敏感性参数排序（IVARS50）数据，Rank_Final工作表存储最终排序结果。
2. 目标函数迭代数据.xlsx：3次参数校准实验的目标函数迭代过程分别存储于CaliTGL、CaliTSH和CaliMAP工作表中。各工作表中，“ID”代表迭代编号，“NSE”或“Kappa”代表对应目标函数值，“Best”表示当前最优目标函数值，“ID-Ens”指代用于参数集合模拟的13组参数对应的迭代编号，“ID-Default”指代默认参数对应的迭代编号。
3. 空间验证排序数据.xlsx：包含4组独立空间验证实验结果，即活动层厚度（ALT）、冻融界面温度（TTOP）、10米深度地温（GT10m）的年平均值与变化率，数据按站点/调查区域对均方根误差（RMSE）进行排序。
4. CaliMAP空间验证数据.xlsx：CaliMAP实验的独立空间验证详细结果，所用观测数据源自Zhao等，2021（https://doi.org/10.5194/essd-13-4207-2021）。
5. 多年冻土类型投票数据.xlsx：基于CaliMAP实验，通过13组集合模拟投票得到的逐网格多年冻土类型变化数据（多年冻土vs季节冻土）。
6. 活动层厚度（ALT）趋势数据.xlsx：基于CaliMAP实验得到的逐网格活动层厚度（ALT）变化趋势及其p值。
7. 冻融界面温度（TTOP）趋势数据.xlsx：基于CaliMAP实验得到的逐网格冻融界面温度（TTOP）变化趋势及其p值。
8. DZAA趋势数据.xlsx：基于CaliMAP实验得到的逐网格DZAA变化趋势及其p值。
9. 多年冻土平均地温（MAGT）趋势数据.xlsx：基于CaliMAP实验得到的逐网格多年冻土平均地温（MAGT）变化趋势及其p值。
10. 多年冻土变量时间序列数据.xlsx：基于CaliMAP实验得到的多年冻土面积、季节冻土面积以及活动层厚度（ALT）、冻融界面温度（TTOP）、DZAA、多年冻土平均地温（MAGT）的时间序列数据。注：多年冻土面积是在排除冰川与湖泊面积后，采用等面积投影计算得到的。
11. 站点校准差异数据.xlsx：相较于CaliMAP模拟结果，2010年多年冻土面积、活动层厚度（ALT）、冻融界面温度（TTOP）、DZAA的百分比差异，以及CaliFree、CaliTGL和CaliTSH的阶段性变化趋势。