Editing IPCC:AR6/WGI/Chapter-4 (section)

====== Seasonal warming patterns ======

The warming pattern shows distinct seasonal characteristics. The majority of models show a stronger hemispheric winter than summer warming over land poleward of about 55°N and 55°S (Figure 4.20) and thereby a reduced amplitude of the temperature cycle ( [[#Dwyer--2012|Dwyer et al., 2012]] ; [[#Donohoe--2013|Donohoe and Battisti, 2013]] ). On the other hand, over most of the subtropics and mid-latitudinal land regions except for parts of Asia, models project stronger warming in hemispheric summer than winter ( [[#Donohoe--2013|Donohoe and Battisti, 2013]] ; [[#Santer--2018|Santer et al., 2018]] ), leading to an amplification of the seasonal cycle. This phenomenon has been studied particularly in the case of the amplified summer warming over the Mediterranean region ( [[#Seager--2014a|Seager et al., 2014a]] ; [[#Kröner--2017|Kröner et al., 2017]] ; [[#Brogli--2019|Brogli et al., 2019]] ).

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'''Figure 4.20''' '''|''' '''Difference of surface temperature change between June–July–August (JJA) and December–January–February (DJF).''' Displayed are spatial patterns of multi-model mean difference in projected warming in JJA minus warming in DJF in 2081–2100 relative to 1995–2014 for '''(left)''' SSP1-2.6 and '''(right)''' SSP3-7.0. Diagonal lines mark areas where fewer than 80% of the models agree on the sign of change, and no overlay where at least 80% of the models agree. Further details on data sources and processing are available in the chapter data table (Table 4.SM.1).

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