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====Snow and snow cover====
The ISPM summary states: "There is no globally-consistent pattern in snow-covered area or snow depth." [ISPM 2.2b] This represents a marked contrast to the AR4 chapter summary which states: "Snow cover has decreased in most regions, especially in spring and summer." [AR4 4 ES]
In discussing overall northern hemisphere (NH) snow cover trends the ISPM pays special attention to the month of October: "Over the 1966 to 2004 interval, mean Northern Hemisphere snow cover in October showed a statistically insignificant decline. But over the entire span of available data
(1922 to 2004) the mean Northern Hemisphere snow cover in October shows a statistically significant increase." [ISPM 2.2b]
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 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====
==External links==
