FaIR v1.6.2 calibrated and constrained parameter set

These .json files provides the 2237 ensemble members that are used to run the FaIR simple climate model in the IPCC's Sixth Assessment Report contributions to Working Group 1 and Working Group 3. v1.1 of this dataset includes two versions of the files: the original full parameter set `fair-1.6.2-wg3-params.json` as in v1.0 reduced file size versions `fair-1.6.2-wg3-params-slim.json` and `fair-1.6.2-wg3-params-common.json` where only the parameters that vary between ensemble members are included in the former and everything else is in the latter. This is optimised for running the Working Group 3 climate assessment. Drawn from an initial prior ensemble of 1 million, the following constraints are placed upon the results: representation of observed warming from 1850-2019, within observational uncertainty representation of observed ocean heat content change 1971-2018, within observational uncertainty reproduction of near-present day atmospheric concentrations of CO2 from the carbon cycle airborne fraction of CO2 with a distribution similar to the assessed range of Chapter 5, IPCC Working Group 1 AR6 equilibrium climate sensitivity with a similar distribution to Chapter 7, IPCC Working Group 1, AR6 transient climate response with a similar distribution to Chapter 7, IPCC Working Group 1, AR6 projected future warming that is of a similar distribution to the SSP scenarios of Chapter 4, IPCC Working Group 1, AR6, when run with prescribed concentrations <strong>Changelog</strong> v1.1: inclusion of lightweight parameter sets. v1.0: original upload full parameter sets.本数据集包含2237个集合成员样本，用于运行政府间气候变化专门委员会（Intergovernmental Panel on Climate Change，IPCC）第六次评估报告（Sixth Assessment Report，AR6）第一工作组与第三工作组相关章节所采用的FaIR简单气候模型（FaIR Simple Climate Model）。本数据集v1.1版本包含两类文件：其一为v1.0版本中留存的完整参数集文件`fair-1.6.2-wg3-params.json`；其二为压缩文件体积的两个衍生文件`fair-1.6.2-wg3-params-slim.json`与`fair-1.6.2-wg3-params-common.json`，其中前者仅保留集合成员间存在差异的参数，后者则包含其余全部参数。该数据集专为第三工作组气候评估运行场景进行了优化。其样本源自初始规模为100万的先验集合，且对结果施加了如下约束：需在观测不确定性范围内重现1850-2019年的观测升温过程；需在观测不确定性范围内重现1971-2018年的观测海洋热含量变化；需复现基于碳循环的近当前大气CO₂浓度；CO₂大气留存份额的分布需与IPCC第一工作组AR6第五章的评估范围相符；平衡气候敏感度（Equilibrium Climate Sensitivity）的分布需与IPCC第一工作组AR6第七章的对应分布一致；瞬变气候响应（Transient Climate Response）的分布需与IPCC第一工作组AR6第七章的对应分布一致；在采用给定浓度场景运行时，未来预估升温的分布需与IPCC第一工作组AR6第四章的共享社会经济路径（Shared Socioeconomic Pathways，SSP）情景分布相符。<strong>更新日志</strong>v1.1：新增轻量级参数集文件。v1.0：首次上传的完整参数集版本。