Editing IPCC:AR6/WGI/Chapter-10 (section)

==== 10.1.2.1 Spatial Scales and Definition of Regions ====

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Large-scale climate and the associated phenomena have been defined in [[IPCC:Wg1:Chapter:Chapter-2|Chapter 2]] (e.g., Cross-Chapter Box 2.2) as ranging from global and hemispheric, to ocean basin and continental scales. The definition of the regional scale is case specific in the AR6 WGI Report. [[IPCC:Wg1:Chapter:Chapter-1#1.4.5|Section 1.4.5]] provides definitions of the different regional types adopted by the different chapters. In this chapter, regional scales are defined as ranging from the size of sub-continental areas (e.g., the Mediterranean basin) to local scales (e.g., coastlines, mountain ranges and cities) without prescribing any formal regional boundaries. These spatial length scales range from a few thousand down to a few kilometres and the relevant driving modes and processes at regional scales are summarized in Figure 10.3. In contrast to Chapters 11, 12 and Atlas, which make a region-by-region assessment of climate change, this chapter does not necessarily restrict itself to the use of the AR6 WGI Reference Regions ( [[IPCC:Wg1:Chapter:Chapter-1#1.4.5|Section 1.4.5]] and Atlas.1.3). Different regional definitions have been used in sections 10.4 and 10.6, selected for their adequacy to illustrate methodological aspects (e.g., for the attribution of long-term regional trends, regions that display such trends have been selected). Typological regions ( [[IPCC:Wg1:Chapter:Chapter-1#1.4.5|Section 1.4.5]] and Atlas.1.3) are used in Box 10.3 and Cross-Chapter Box 10.4.

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'''Figure 10.3 | Schematic diagram''' '''to display interacting spatial and temporal scales relevant to regional climate change information.''' Figure adapted from [[#Orlanski--1975|Orlanski (1975)]] . The processes included in the different models and model components considered in Chapter 10 are indicated as a function of these scales. The various types of models (including global and regional climate models) for constructing regional climate information are assessed in [[#10.3.1|Section 10.3.1]] and Box 10.3.

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