Dataset and codes for 'Climatic control on seasonal variations of glacier surface velocity' by Nanni et al., submitted in TC

This repository contains the codes and processed data used to retrieve 10-day changes in glacier surface velocity over the Western Pamir. The supp_CODES.zip contains all details and codes to use COSI-CORR (http://www.tectonics.caltech.edu/slip_history/spot_coseis/) to process a large batch of satellite images. The images can be downloaded directly via https://earthexplorer.usgs.gov/ or https://scihub.copernicus.eu. Please read the Methods and Data section of the associated manuscript for details. The Matrix_velocities.zip contains, for each of the 48 investigated glaciers, the DEM, X, Y (NANNI_2022_supp_glacier_centreline_DEM_XY_1px_30m_1.txt) as well as a matrix of n*m with m the distance along flow and n the number of time step over which the velocity is calculated (NANNI_2022_supp_glacier_centreline_vel_matrix_1px_30m_1.txt), ans the associated figure that show the multi year velocity changes together with the one year average and the along centreline profiles. An example is shown in the two figures for glacier 48 in the main repository. The NANNI_2022_supp_glacier_characteristics file contains the glacier characteristics (48*8), as shown in the associated figures. The NANNI_2022_supp_pickedpoints_migration_AUTUMN/SPRING contains the automatically picked points for the onset of the acceleration in Spring and Autmun for each glacier. The headers contains the information, and the files contains is shown in the associated figure. the temperature profiles used to calculate the Iso 0C are in NANNI_2022_supp_temp_perday_fedchenko_2400m The position of each 48 glacier is shown in the associated figure. Please contact me for any question.

本仓库收录了用于获取西帕米尔高原冰川表面10日尺度速度变化的代码与处理后数据集。其中supp_CODES.zip包含批量处理卫星影像所需的全部细节，以及COSI-CORR工具（http://www.tectonics.caltech.edu/slip_history/spot_coseis/）的使用代码。卫星影像可直接通过https://earthexplorer.usgs.gov/ 或https://scihub.copernicus.eu 下载获取。详细实验流程与数据说明请参阅相关论文的方法与数据章节。
Matrix_velocities.zip内含48条研究冰川的配套数据集：每条冰川对应数字高程模型（DEM）、沿流动方向的X、Y坐标（对应文件为NANNI_2022_supp_glacier_centreline_DEM_XY_1px_30m_1.txt），以及一个n×m的速度矩阵（其中m代表沿流动方向的距离维度，n为计算速度所用的时间步长总数，对应文件为NANNI_2022_supp_glacier_centreline_vel_matrix_1px_30m_1.txt），同时附带展示多年速度变化、年平均速度及沿中心线剖面的配套可视化图表。主仓库中以第48号冰川为例，配有两张展示上述内容的示意图。
NANNI_2022_supp_glacier_characteristics文件收录了48条冰川的特征参数（共48组×8项），相关可视化结果见配套图表。NANNI_2022_supp_pickedpoints_migration_AUTUMN/SPRING文件夹内含各冰川春、秋两季加速起始点的自动拾取点数据，文件头包含相关元数据说明，文件内容的可视化效果见配套图表。用于计算0℃等温线的逐日温度剖面数据存储于NANNI_2022_supp_temp_perday_fedchenko_2400m文件中。48条冰川的空间分布位置详见配套图表。如有任何疑问，请联系作者。