GFDL_R30_SRES_A2

Project: IPCC Data Distribution Centre : Third Assessment Report data sets - The Intergovernmental Panel on Climate Change (IPCC) has been established by WMO und UNEP to assess scientific, technical and socio-economic information, relevant for the understanding of climate change, its potential impacts and option for adaption and migration. Projection of future trends for a number of key variables are provided through this section of the DDC (http://ipcc-data.org/sim/gcm_clim/SRES_TAR ). This information contained in either IS92 emission scenarios (IPCC 1992), the Special Report on Emission Scenarios (IPCC 2000, SRES) or published model studies using data from these scenarios. Six alternative IPCC scenarios (IS92a to f) were published in the 1992 Supplementary Report to the IPCC Assessment. These scenarios embodied a wide array of assumption affecting how future greenhouse gas emissions might evolve in the absence of climate policies beyond those already adoped. The SRES scenarios have been constructed to explore future developments in the global enviromental with special reference to the production of greenhouse gases and aerosol precursor emission. A set of four scenario families (A1, A2, B1, B2) have been developed that each of this storylines describes one possible demographic, polito-economic, societal and technological future. Model experiments, also using different forcing scenarios, were calculated at other modeling centres. Emissions Scenarios. 2000 ,Special Report of the Intergovernmental Panel on Climate Change Nebojsa Nakicenovic and Rob Swart (Eds.) Cambridge University Press, UK. pp 570 Summary: The SRES data sets were published by the IPCC in 2000 and classified into four different scenario families (A1, A2, B1, B2). SRES_A2 storyline describes a very heterogeneous world with the underlying theme of self-reliance and preservation of local identities. It results in this scenario a continous increasing population together with a slower economic growth and technological change. The atmospheric component solves the primitive equations using a spectral transform method, GFDL_R30 means a rhomboidal 30 truncation and the ocean component solves the primitive equation of motion using the Boussinesq, rigid-lid and hydrostatic approximation and based on GFDL Modular Ocean Model version 1. The changes of anthropogenic emissions of CO2, CH4, N2O and sulphur dioxide are prescribed according to the above mentioned scenario.项目：政府间气候变化专门委员会（Intergovernmental Panel on Climate Change, IPCC）数据分发中心：第三次评估报告数据集——世界气象组织（World Meteorological Organization, WMO）与联合国环境规划署（United Nations Environment Programme, UNEP）联合设立政府间气候变化专门委员会，旨在评估与理解气候变化、其潜在影响以及适应与迁移方案相关的科学、技术与社会经济信息。本数据分发中心的该板块（http://ipcc-data.org/sim/gcm_clim/SRES_TAR）提供了若干关键变量的未来趋势预测结果。 这些信息要么源自IS92排放情景（IPCC 1992）、《排放情景特别报告》（IPCC 2000, SRES），要么来自基于上述情景数据开展的已发表模型研究。IPCC于1992年发布的评估报告补充报告中公布了6种备选情景（IS92a至IS92f），这些情景涵盖了一系列假设条件，用于刻画在未实施额外气候政策的前提下，未来温室气体排放的演化路径。 SRES情景的构建旨在探究全球环境的未来发展态势，尤其聚焦于温室气体与气溶胶前体物的排放情况。研究团队构建了包含4类情景族（A1、A2、B1、B2）的框架，每类情景均对应一种可能的人口、政治经济、社会与技术发展未来。其他建模中心也基于不同的强迫情景开展了模型实验。 *《排放情景》，2000年，政府间气候变化专门委员会特别报告*，主编：Nebojsa Nakicenovic与Rob Swart，英国剑桥大学出版社，第570页。 **摘要**：SRES数据集由IPCC于2000年发布，共分为4类情景族（A1、A2、B1、B2）。SRES_A2情景的叙事主线描绘了一个高度异质性的世界，其核心主题为自给自足与本土身份认同的保留。该情景下，人口持续增长，而经济增长与技术变革速度相对放缓。 大气分量模块采用谱变换方法求解原始方程，其中GFDL_R30指菱形30波截断；海洋分量模块基于GFDL模块化海洋模型第1版（GFDL Modular Ocean Model version 1），采用布辛涅斯克近似（Boussinesq）、刚性盖近似与静力学近似求解原始运动方程。二氧化碳（CO₂）、甲烷（CH₄）、一氧化二氮（N₂O）与二氧化硫的人为排放变化均依据前述情景设定。