” Septembers in 1961-2008 using the
1961-1990 median as the threshold was only 40%. Even more strikingly, the probability of
“very dry” Septembers increased from 10% to 23%. Thus, the division of monthly
precipitation totals to different categories is in some cases disturbingly sensitive to the
baseline period used for the classification. 1961-2008 would probably be a more
representative baseline than
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