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--- tools:actools:cmaq_reduced [2017/02/10 11:50]
ctena [8h_max]
+++ tools:actools:cmaq_reduced [2017/02/14 15:41] (current)
ctena [8h_max]
@@ Line 132: / Line 132: @@
 That's the most complex reduced type.
-==== day_mean ====
+The result is one value for each cell and each day.
+This result is the maximum daily 8 hour mean.
-==== day_max ====
+DIRECTIVE 2008/50/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL
+Maximum daily eight-hour mean: the maximum daily eight-hour mean concentration shall be selected by examining eight-hour running averages, calculated from hourly data and updated each hour. Each eight -hour average so calculated shall be assigned to the day on which it ends. i.e. the first calculation period for any one day will be the period from 17:00 on the previous day to 01:00 on that day; the last calculation  period for any one day will be the period from 16:00 to 24:00 on the day.
+==== day_mean ====
+The mean of each day
+==== day_max ====
+The maximum value of each day