Table 4.

Sampled cirrus cloud frequency of occurrence for each 30-degree latitude zone, and also for the entire globe (last line) during 2008 and 2013.

Occurrence of selected conditions (%) during 2008 (Dec 2007 to Nov 2008)
	DJF	MAM	JJA	SON
60N-82N	0.49	0.2	0.21	0.22
30N-60N	0.74	0.96	0.60	0.73
0N-30N	1.58	1.90	2.02	1.70
30S-0S	1.58	1.46	0.75	1.07
60S-30S	0.25	0.39	0.47	0.36
82S-60S	0.16	0.19	0.31	0.72
Full globe	0.81	0.86	0.73	0.80

Occurrence of selected conditions (%) during 2013 (March 2013 to Feb 2014)
	DJF	MAM	JJA	SON
60N-82N	0.61	0.31	0.16	0.24
30N-60N	0.90	0.98	0.56	0.65
0N-30N	1.43	1.82	1.86	1.76
30S-0S	1.58	1.47	0.79	1.05
60S-30S	0.30	0.36	0.46	0.35
82S-60S	0.09	0.20	0.42	0.61
Full globe	0.82	0.86	0.71	0.78