Editing IPCC:AR6/WGI/Chapter-Atlas (section)

=== Atlas.1.1 Purpose ===

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The Atlas is the final chapter of this Working Group I (WGI) Sixth Assessment Report (AR6) and comprises the Atlas Chapter and an online interactive tool, the Interactive Atlas. The Atlas assesses fundamental aspects of observed, attributed and projected changes in regional climate in coordination with other WGI chapters (Chapters 2, 3, 4, 6, 8, 9, 10, 11 and 12). In particular, it provides analyses and assessments of regional changes in mean climate (specifically surface temperature, precipitation and some cryospheric variables, such as snow cover and surface mass balance) and expands on and integrates results from other chapters across different spatial and temporal scales. The Atlas considers multiple lines of evidence including assessment of different global and regional observational datasets, attribution of observed trends and multiple model simulations from the Coupled Model Intercomparison Projects CMIP5 (K.E. [[#Taylor--2012|]] [[#Taylor--2012|Taylor et al., 2012]] ) and CMIP6 ( [[#Eyring--2016|Eyring et al., 2016]] ; [[#O’Neill--2016|O’Neill et al., 2016]] ), and the Coordinated Regional Downscaling Experiment (CORDEX; [[#Gutowski%20Jr.--2016|Gutowski Jr. et al., 2016]] ). The Atlas chapter also assesses model performance and summarizes cross-referenced findings from other chapters relevant for the different regions.

The Interactive Atlas is a novel product of this Report that allows for a flexible spatial and temporal analysis of the results presented in the Atlas and other chapters, the Technical Summary (TS) and the Summary for Policymakers (SPM), supporting and expanding on their assessments. The Interactive Atlas includes two components. The first component (Regional Information) includes information from global observational (and paleoclimate simulation) datasets assessed in [[IPCC:Wg1:Chapter:Chapter-2|Chapter 2]] and projections of relevant extreme indices (used in Chapter 11) and climatic impact-drivers (CIDs, used in Chapter 12) allowing for a regional analysis of the results (Section [[#Atlas.2.2|Atlas.2.2]] ). It provides information on CIDs relevant to sectoral and regional chapters of the Working Group II (WGII) report, being informed by and complementing the work of [[IPCC:Wg1:Chapter:Chapter-12|Chapter 12]] in creating a bridge to WGII. The second component (Regional Synthesis) provides synthesis information about changes in CIDs in several categories such as heat and cold, wet and dry, or coastal and oceanic, supporting exploration of the regional assessment findings summarized in the TS and the SPM. An overview of the main components of the Atlas chapter is provided in Figure Atlas.1. The Interactive Atlas is described in [[#Atlas.2|Atlas.2]] and is available online at [http://interactive-atlas.ipcc.ch interactive-atlas.ipcc.ch] .

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[[File:8e2533d4c5d8a64a9df75096676c4836 IPCC_AR6_WGI_Atlas_Figure_1.png]]

'''Figure Atlas.1''' '''|''' '''Visual guide to the Atlas chapter with (lower right) a screenshot from the online Interactive Atlas.'''

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