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

=== Atlas.2.1 Why an Online Interactive Atlas in AR6? ===

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The idea of an online interactive Atlas was first discussed in the IPCC Expert Meeting on Assessing Climate Information for the Regions ( [[#IPCC--2018a|IPCC, 2018a]] ). The meeting stressed the need for the AR6 regional Atlas to go beyond the AR5 experience in supporting and expanding the assessment of key variables/indices and datasets conducted in all chapters, ensuring traceability, and facilitating the ‘handshake’ between WGI and WGII. One of the main limitations of previous products, including the AR5 WGI Atlas ( [[#IPCC--2013a|IPCC, 2013a]] ), is their static nature with inherent limited options and flexibility to provide comprehensive regional climate information for different regions and applications. For instance, the use of standard seasons limits the assessment in many cases, such as regions affected by monsoons or seasonal rainband migrations or other phenomena-driven seasons. The limited number of variables which can be treated on a printed Atlas also prevents the inclusion of relevant extreme indices and CIDs. The development of an online Interactive Atlas for AR6 was proposed as a solution to overcome these obstacles, facilitating the flexible exploration of key variables/indices and datasets assessed in all chapters through a wide range of maps, graphs and tables generated in an interactive manner, and thus also providing support to the TS and SPM. One of the main concerns raised by this new online interactive product was the potential danger of having an unmanageable number of final products impossible to assess following the IPCC review process. This was addressed by designing the Interactive Atlas with limited and predefined functionality and granularity, thus facilitating the review process and including use of open-source tools and code for traceability and reproducibility of results.

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