Modèle Atmosphérique Régional (MAR) version 3.12 regional climate model pseudo-global warming experiment output, 2000-2019, Greenland domain, 20 kilometer (km) horizontal resolution.

### Access

Data files can be accessed via: https://arcticdata.io/data/10.18739/A2TT4FV6W/

### Overview

The Modèle Atmosphérique Régional (MAR) regional climate model is fully coupled to the Soil Ice Snow Vegetation Atmosphere Transfer (SISVAT) one-dimensional surface-atmosphere energy and mass transfer scheme (Fettweis et al., 2005, 2020; Lefebre et al., 2005). SISVAT simulates meltwater production, percolation, refreeze, and the impact of snow metamorphism on albedo via a multilayered snowpack model, CROCUS (Brun et al., 1989; Brun et al., 1992). Through extensive verification, MAR has proved to be well-suited for analyses of Greenland Ice Sheet (GrIS) surface mass balance (SMB) (Fettweis et al., 2011; Fettweis et al., 2020; Lefebre et al. 2005; Mattingly et al. 2020). This dataset contains the results of a model experiment that utilized the pseudo-global warming method of dynamical downscaling in MAR version 3.12. It includes a control run, in which MARv3.12 was forced with European Centre for Medium-Range Weather Forecasts Reanalysis v5 (ERA5) global reanalysis to simulate the historical GrIS SMB from 2000 to 2019, and two pseudo-global warming simulations: PGW1, in which we estimate the impact of the change in the thermodynamic background state under anthropogenic warming to GrIS surface mass loss and PGW2 in which we isolate the influence of changing sea-surface conditions.The naming convention for each file is explained using the example below:

File name format: ICE_experiment_year_month_start day_end day of month.nc

Example: ICE_b03_2009_09_01_30.nc

experiment: specifies one of the following labels for each of the model experiments: "a02" indicates output from the PGW1 run, "b03" indicates PGW2 output, "c01" marks the 2000-2019 control run, and "c02" contains control data for a 1980-1989 reference period when the mass balance of the Greenland Ice Sheet was relatively stable.

year: indicates the model year

month: indicates the model month

start day and end day: indicate the first and last days of the model month

### 数据访问
数据文件可通过以下链接获取：https://arcticdata.io/data/10.18739/A2TT4FV6W/

### 数据集概览
区域大气模式（Modèle Atmosphérique Régional，MAR）与土壤-冰-雪-植被-大气传输（Soil Ice Snow Vegetation Atmosphere Transfer，SISVAT）一维地表-大气能量与质量传输方案完全耦合（Fettweis等，2005、2020；Lefebre等，2005）。SISVAT通过多层积雪模式CROCUS模拟融水生成、渗流、再冻结过程，以及积雪变质作用对反照率的影响（Brun等，1989；Brun等，1992）。经大量验证，MAR已被证实适用于格陵兰冰盖（Greenland Ice Sheet，GrIS）表面质量平衡（surface mass balance，SMB）的相关分析（Fettweis等，2011；Fettweis等，2020；Lefebre等，2005；Mattingly等，2020）。本数据集包含基于MAR 3.12版本，采用伪全球变暖（pseudo-global warming）动力降尺度方法开展的模式试验结果。数据集包含一组对照试验与两组伪全球变暖模拟试验结果：其一为对照试验，以欧洲中期天气预报中心第五代再分析资料（European Centre for Medium-Range Weather Forecasts Reanalysis v5，ERA5）作为强迫场，模拟2000-2019年历史时期格陵兰冰盖表面质量平衡；其二为PGW1模拟试验，用于评估人为变暖下热力学背景态变化对格陵兰冰盖表面物质损失的影响；其三为PGW2模拟试验，用于分离海表条件变化的影响。
各文件的命名规则如下文示例所示：
文件命名格式：ICE_试验代号_年份_月份_起始日_月末日.nc
示例：ICE_b03_2009_09_01_30.nc
试验代号：用于标识以下四类模式试验：
"a02"：对应PGW1模拟试验的输出结果；
"b03"：对应PGW2模拟试验的输出结果；
"c01"：对应2000-2019年的对照试验；
"c02"：对应格陵兰冰盖质量平衡相对稳定的1980-1989年参考时段的对照试验数据。