For example: (a) In 1919, the statistical means crosses zero - value; or, in other words, all previous years are
colder; all later years are warmer; (b) Between 1917 and 1928, the increase
during the summer
season is of +0.9 °
C per 10 years, and in winter, of +8.3 °
C, in February, of +11.0 °
C; (
c) It seems that the changes are coming from the North.