Output from the Glacier Energy and Mass Balance (GEMB beta) forced with 3-hourly ERA5 fields and gridded to 5km, Antarctica 1992-2019

These model output of firn air content (FAC) and surface mass balance (SMB) are from version beta (0.0) of the open-source Glacier Energy and Mass Balance model. GEMB is a column model of ice sheet and glacier surface-atmospheric energy and mass exchange as well as firn state. GEMB has been integrated into the open-source Ice-Sheet and Sea-level System Model which can be downloaded at https://issm.jpl.nasa.gov/. Here, GEMB is forced with 3-hourly ERA5 output from 1979 through end of 2019, and run under ISSM development version r24739. The GEMB output is bilinearly interpolated onto a 5km grid, from the native ISSM grid, and the output is given monthly. SMB in units m/yr ice and FAC in units m. The projection is EPSG:3031 - WGS 84 / Antarctic Polar Stereographic.

本研究中的粒雪空气含量（firn air content, FAC）与表面质量平衡（surface mass balance, SMB）的模型输出结果，均来自开源冰川能量与质量平衡模型（Glacier Energy and Mass Balance, 简称GEMB）的0.0 beta版本。GEMB是一款用于模拟冰盖与冰川-大气界面能量、物质交换过程以及粒雪状态的柱式模型。该模型已集成至开源冰盖与海平面系统模型（Ice-Sheet and Sea-level System Model, 简称ISSM），其官方下载地址为https://issm.jpl.nasa.gov/。本研究中，GEMB以1979年至2019年底的逐3小时ERA5再分析数据作为强迫驱动场，并基于ISSM的r24739开发版本运行。GEMB的输出结果从ISSM原生网格通过双线性插值重采样至5公里分辨率的网格，且输出时间分辨率为月尺度。其中表面质量平衡（SMB）的单位为米/年（冰当量），粒雪空气含量（FAC）的单位为米。数据投影采用EPSG:3031坐标系——WGS 84/南极极立体投影（Antarctic Polar Stereographic）。