Chapter 8 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 8.14 (v20220718)

Data for Figure 8.14 from Chapter 8 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6). Figure 8.14 shows projected long-term relative changes in seasonal mean precipitation. --------------------------------------------------- How to cite this dataset --------------------------------------------------- When citing this dataset, please include both the data citation below (under 'Citable as') and the following citation for the report component from which the figure originates: Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, and O. Zolina, 2021: Water Cycle Changes. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 1055–1210, doi:10.1017/9781009157896.010. --------------------------------------------------- Figure subpanels --------------------------------------------------- The figure has multiple panels. Data is provided in panel-specific sub-directories. --------------------------------------------------- List of data provided --------------------------------------------------- This dataset contains: - Global maps of projected relative changes (%) in seasonal mean of precipitation averaged across 29 CMIP6 models in the SSP2-4.5 scenario (2081–2100 relative to the 1995–2014). --------------------------------------------------- Data provided in relation to figure --------------------------------------------------- There are two NetCDF files per panel: one for the main field (*pr_means*.nc), which is represented with colors, the other for the confidence information (*pr_agreement-fraction-on-sign*.nc), based on agreement fraction of models about signal change sign, which is represented by diagonal lines as specified by the so called AR6 simple hatching scheme. Each datafile has NetCDF attributes which clearly describe the data. CMIP6 is the sixth phase of the Coupled Model Intercomparison Project. SSP245 is the Shared Socioeconomic Pathway which represents the median of radiative forcing and development scenarios, consistent with RCP4.5. --------------------------------------------------- Sources of additional information --------------------------------------------------- The following weblinks are provided in the Related Documents section of this catalogue record: - Link to the figure on the IPCC AR6 website - Link to the report component containing the figure (Chapter 8) - Link to the Supplementary Material for Chapter 8, which contains details on the input data used in Table 8.SM.1 - Link to the code for all figures in Chapter 8, archived on Zenodo. - Link to the documentation for CAMMAC, the tool used for AR6 analysis.

本数据集为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（Working Group I, WGI）贡献内容中第8章图8.14的配套数据。图8.14展示了季节平均降水量的长期相对变化预测。
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引用本数据集时，请同时使用下方“可引用标识”项下的数据引用格式，以及该图表所属报告章节的如下引用：Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, 及 O. Zolina, 2021: 水循环变化。收录于《气候变化2021：物理科学基础》：政府间气候变化专门委员会（IPCC）第六次评估报告第一工作组贡献内容 [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, 及 B. Zhou 主编]。英国剑桥剑桥大学出版社及美国纽约州纽约市，第1055–1210页，doi:10.1017/9781009157896.010。
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该图表包含多个子面板，数据按子面板专属子目录进行存储与提供。
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本数据集包含：在SSP2-4.5情景下，29个耦合模式比较计划第六阶段（Coupled Model Intercomparison Project Phase 6, CMIP6）模式平均的季节平均降水相对变化（百分比）全球分布图，时段为2081–2100年，参照基准期为1995–2014年。
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每个子面板对应2个NetCDF（Network Common Data Form）文件：一个为核心场文件（*pr_means*.nc），以色彩表征数据分布；另一个为置信度信息文件（*pr_agreement-fraction-on-sign*.nc），基于模式对信号变化符号的一致性占比，采用AR6简易 Hatch 方案（AR6 simple hatching scheme）指定的斜线进行可视化。所有数据文件均附带清晰描述数据内容的NetCDF属性。耦合模式比较计划第六阶段（CMIP6）是耦合模式比较计划的第六个迭代阶段。SSP2-4.5为共享社会经济路径（Shared Socioeconomic Pathway, SSP），代表辐射强迫与发展情景的中位数，与典型浓度路径4.5（Representative Concentration Pathway 4.5, RCP4.5）相一致。
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本目录记录的相关文档板块提供了以下网页链接：
- IPCC AR6官网中的该图表专属链接
- 包含该图表的第8章报告章节链接
- 第8章补充材料链接，其中包含表8.SM.1所用输入数据的详细信息
- 存档于Zenodo的第8章所有图表代码链接
- 本次AR6分析所用工具CAMMAC的官方文档链接