The Influences of the Model Configuration on the Simulation of Stratospheric Northern-Hemisphere Polar Vortex in the CMIP5 Models

Table 3

The median value of the model rankings of the mean temperatures in the stratospheric polar vortex region, classified into 6 pairs of groups: HT/LTOP models, with/without nonorographic wave drag, high/low vertical resolution in the stratosphere, ESM/GCM, interactive/noninteractive chemistry, and high/low horizontal resolution.

		Ranking	Number of models
Lid top	HT	15.1	20
	LT	22.55	22
Nonorographic wave	Y	14.40	21
	N	23.90	21
Interactive chemistry	Y	18.3	14
	N	20.1	28
GCM/ESM	ESM	17.3	23
	GCM	23.9	19
Horizontal resolution	H	18.7	22
	L	19.4	20
Vertical resolution	H	14.65	18
	L	24.2	24