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SW: →Snow and snow cover: Typo
The other 11 months are summarized more succintly: "Over the 1966 to 2004 interval, mean Northern Hemisphere snow cover trended downward in spring and summer, but not substantially in winter." [ISPM 2.2b]. 10 of those months showed decrease in NH snow cover and five were statistically significant (March, April, June, July and August). [AR4 Table 4.2]
Moreover, the trends for the two available months other than October in the interval 1922 to 2004 (March and April) are not mentioned at all in the ISPM. They show a significant decrease. [AR4 Table 3.2]
====Arctic ice====
