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Heat/cold degree days and Chill hours: Difference between revisions
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Heat/cold degree days and Chill hours (view source)
Revision as of 14:12, 30 November 2012
, 30 November 2012→Setting the threshold
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So if for each day of June, there were 3 hours above the threshold, the total for the month would be 90 hours reported as 3 days.
=Setting the threshold=
[[File:NOAA_Setup_extract.jpg]]The thresholds for '''Heat and Cold Degree days''' are set in the ''NOAA Setup'' option within the ''Configuration'' menu. The picture shows just parts of the setup screen. It allows you to specify the two thresholds in the units you have selected to use in your implementation of Cumulus. Cumulus stores your selected threshold values in '''Cumulus\Cumulus.ini''', Heating and Cooling Degree Days are stored in dayfile.txt, and are available via heating/cooling degree days web tags.
CAUTION: Think carefully, about what threshold to use. If you later change the threshold, only subsequent calculations use the new threshold. All retrospective calculations remain based on the old threshold, so values shown on a NOAA report for a month or a year with a threshold change will be rubbish, and need to be manually recalculated. The figures are on the reports, so make any edits directly on past reports.
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