A Semi-Empirical Framework for Ice Sheet Response Analysis under Oceanic Forcing in Antarctica and Greenland

Supplementary material for Luo, X. & Lin, T. (2022). “A Semi-Empirical Framework for Ice Sheet Response Analysis under Oceanic Forcing in Antarctica and Greenland.” Climate Dynamics, in press. https://doi.org/10.1007/s00382-022-06317-x This repository contains data and scripts that are used to facilitate the analysis of Greenland and Antarctica ice sheet melting induced by ocean warming. The GCM directory contains ocean potential temperature time series for both Antarctica ice shelves near open sea retrieved from FGOALS-s2 under RCP 6.0 and Greenland store glacier retrieved from MIROC5 under RPC8.5 and HadGEM3-GC31-MM projections under update of RCP8.5 based on SSP5. The raw data are accessed from CMIP5 (https://esgf-node.llnl.gov/search/cmip5/) and CMIP6 (https://esgf-node.llnl.gov/search/cmip6/) projects respectively and the processed data deposited here are stored in Excel format. The WOD directory contains the NetCDF files of Present-Day ocean conditions including temperature, salinity, depth, and other variables retrieved from World Ocean Database (WOD). The data are deposited as NetCDF format. The Analysis directory contains 3 subdirectories that illustrates the analysis workflow for both Greenland and Antarctica. The Antarctica subdirectory contains the analysis codes to reproduce Antarctica ice shelf melting response and future projection. Antarctica_analysis.m is the main routine for computation and plotting, and the other files are input files including PISM/PICO simulations outputs and ocean temperature time series retrieved from CMIP5 project that can be found on the previous GCM directory. The Greenland subdirectory contains the main routine store_analysis.m for Greenland Store glacier computation and plotting, the response time series (store.mat), perturbed response time series (store_pert.mat), ocean temperature projection (store_temp.mat) generated by MIROC5, and subglacial runoff time series (store_runoff.mat) estimated from annual basin surface runoff using MAR data forced by MIROC5 under RCP8.5. The Historical subdirectory contains the data and scripts used for the historical analyses in the main text. AIS_melt_historical.m is the main script of the analysis, along with two other plotting functional scripts including plot_melt_rate.m and plot_ocean_temp.m. The input files include the PISM/PICO simulations outputs, which are the same files in Antarctica subdirectory, and other 2 input files that contain the temperature time series from 6 CMIP5 GCMs.本数据集为Luo,X.与Lin,T.于2022年发表（已预印收录于《Climate Dynamics》）的论文《A Semi-Empirical Framework for Ice Sheet Response Analysis under Oceanic Forcing in Antarctica and Greenland》的补充材料，原文DOI：10.1007/s00382-022-06317-x。 本仓库包含用于辅助分析南极与格陵兰冰盖因海洋变暖引发的消融现象的数据集与脚本代码。 【全球气候模式（General Circulation Model，GCM）目录】包含两类海洋位温时间序列数据：一是基于典型浓度路径6.0（Representative Concentration Pathway，RCP 6.0）情景下从FGOALS-s2模式提取的南极近海冰架相关数据；二是基于RCP 8.5情景下从MIROC5模式提取的格陵兰储冰川数据，以及基于共享社会经济路径5（Shared Socioeconomic Pathways 5，SSP5）框架下更新的RCP8.5情景、从HadGEM3-GC31-MM模式获取的对应数据。 本仓库的原始数据分别取自第五次耦合模式比较计划（Coupled Model Intercomparison Project Phase 5，CMIP5，https://esgf-node.llnl.gov/search/cmip5/）与第六次耦合模式比较计划（Coupled Model Intercomparison Project Phase 6，CMIP6，https://esgf-node.llnl.gov/search/cmip6/），经处理后的数据集以Excel格式存储于此。 【WOD目录】包含从世界海洋数据库（World Ocean Database，WOD）提取的现代海洋环境网络通用数据格式（Network Common Data Form，NetCDF）文件，涵盖温度、盐度、深度及其他相关变量，数据以NetCDF格式存储。 【分析目录】包含3个子目录，分别展示南极与格陵兰地区的分析工作流程。 【南极子目录】包含用于复现南极冰架消融响应及未来预估的分析代码。其中Antarctica_analysis.m为计算与绘图的主程序，其余文件为输入文件，包括并行冰盖模式（Parallel Ice Sheet Model，PISM）及其配套冰架模块PICO的模拟输出结果，以及可从前述GCM目录中获取的、取自CMIP5计划的海洋温度时间序列数据。 【格陵兰子目录】包含用于格陵兰储冰川计算与绘图的主程序store_analysis.m，以及各类结果数据：包括MIROC5模式生成的响应时间序列文件store.mat、扰动响应时间序列文件store_pert.mat、海洋温度预估文件store_temp.mat，还有基于RCP8.5情景下MIROC5驱动的区域大气模式（Modèle Atmosphérique Régional，MAR）数据估算的流域年地表径流得到的冰下径流时间序列文件store_runoff.mat。 【历史分析子目录】包含用于复现正文历史分析的数据集与脚本代码。其中AIS_melt_historical.m为本次分析的主脚本，另有两个绘图功能脚本：plot_melt_rate.m与plot_ocean_temp.m。输入文件包括与南极子目录中完全一致的PISM/PICO模式模拟输出结果，以及另外两个包含6个CMIP5全球气候模式温度时间序列的输入文件。