Chapter 8 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 8.15 (v20220718)

Data for Figure 8.15 from Chapter 8 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6). Figure 8.15 shows projected long-term relative changes in daily precipitation statistics. --------------------------------------------------- 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 data of projected seasonal mean relative changes (%) averaged across CMIP6 models in the SSP1-2.6, SSP2-4.5 and SSP5-8.5 scenarios, in: - Number of dry days (e.g. days with less than 1 mm of rain) - Daily precipitation intensity (in mm/ day–1, estimated as the mean daily precipitation amount on wet days – e.g. days with intensity above 1 mm/ day–1) --------------------------------------------------- Data provided in relation to figure --------------------------------------------------- There are two NetCDF files per panel : - One for the main field, which is represented with colors and has 'rchange' or 'rmeans' in the filename - The other for the confidence information, based on fraction of models which agree about signal change sign, which is represented in figures by diagonal lines as specified by the so called AR6 simple hatching scheme; it has 'agreement' or 'slashes' in the filename Each datafile has NetCDF attributes which clearly describe the data. CMIP6 is the sixth phase of the Coupled Model Intercomparison Project. SSP126 is the Shared Socioeconomic Pathway which represents the lower boundary of radiative forcing and development scenarios, consistent with RCP2.6. SSP245 is the Shared Socioeconomic Pathway which represents the median of radiative forcing and development scenarios, consistent with RCP4.5. SSP585 is the Shared Socioeconomic Pathway which represents the upper boundary of radiative forcing and development scenarios, consistent with RCP8.5. --------------------------------------------------- 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）贡献章节第8章的图8.15配套数据。图8.15展示了日降水统计量的长期预估相对变化。
--------------------------------------------------- 数据集引用说明 ---------------------------------------------------
引用本数据集时，请同时使用下方「可引用标注」中的数据引用，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, 以及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第六次评估报告第一工作组贡献报告 [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, 以及B. Zhou (编)]。剑桥大学出版社（英国剑桥、美国纽约州纽约市），第1055–1210页，doi:10.1017/9781009157896.010。
--------------------------------------------------- 图表子面板说明 ---------------------------------------------------
本图表包含多个子面板，数据按子面板专属子目录提供。
--------------------------------------------------- 提供的数据清单 ---------------------------------------------------
本数据集包含全球尺度的预估季节平均相对变化（%）数据，该数据为SSP1-2.6、SSP2-4.5与SSP5-8.5情景下耦合模式比较计划第六阶段（Coupled Model Intercomparison Project Phase 6, CMIP6）多模式集合平均结果，涵盖以下两类指标：
- 无雨日数（例如日降雨量小于1 mm的天数）
- 日降水强度（单位：mm/日，定义为湿日（即日降水量大于1 mm/日的天数）的日均降水量）
--------------------------------------------------- 与图表关联的数据说明 ---------------------------------------------------
每个子面板对应2个网络通用数据格式（NetCDF）文件：
1. 主场文件：以色彩表征数据，文件名包含'rchange'或'rmeans'字段；
2. 置信信息文件：基于模式对信号变化符号的一致性占比生成，采用IPCC AR6标准斜纹填充方案（即图中以对角线斜线标识的置信区域），文件名包含'agreement'或'slashes'字段。
所有数据文件均附带NetCDF属性，可清晰描述数据内容。
CMIP6为耦合模式比较计划第六阶段。SSP1-2.6为共享社会经济路径（Shared Socioeconomic Pathway），代表辐射强迫与发展情景的下限，与RCP2.6兼容；SSP2-4.5为共享社会经济路径，代表辐射强迫与发展情景的中位数，与RCP4.5兼容；SSP5-8.5为共享社会经济路径，代表辐射强迫与发展情景的上限，与RCP8.5兼容。
--------------------------------------------------- 额外信息来源 ---------------------------------------------------
本目录记录的「相关文档」板块提供以下链接：
- IPCC AR6官网的该图表链接
- 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
- 用于AR6分析的CAMMAC工具文档链接