5,838
edits
Heat/cold degree days and Chill hours: Difference between revisions
Heat/cold degree days and Chill hours (view source)
Revision as of 15:18, 11 June 2021
, 15:18, 11 June 2021→Air Frost: Cumulus 1 software
m (→Calculation of Chill Hours: 3.12.0 updates) |
m (→Air Frost: Cumulus 1 software) |
||
| Line 31: | Line 31: | ||
However, the way it can be configured on Cumulus will allow you to track air frost (defined as when temperature at the standard measuring height is below the freezing point for water) hours, ground frost (temperature close to ground level is below freezing) hours or any other measure being below the threshold parameter. Sometimes the term 'grass frost' is used for whan the air temperature goes below 4 degrees Celsius, it roughly corresponds to when grass looks white due to frozen dew (water is more dense below 4 degress than above 4 degrees so the cold moisture falls onto the grass). | However, the way it can be configured on Cumulus will allow you to track air frost (defined as when temperature at the standard measuring height is below the freezing point for water) hours, ground frost (temperature close to ground level is below freezing) hours or any other measure being below the threshold parameter. Sometimes the term 'grass frost' is used for whan the air temperature goes below 4 degrees Celsius, it roughly corresponds to when grass looks white due to frozen dew (water is more dense below 4 degress than above 4 degrees so the cold moisture falls onto the grass). | ||
To see the number of '''Air Frost days''', use the View menu to select 'This Month', 'This Year' or 'This Period' and choose the precise period of interest using the drop down selectors. (As at build 1058, there are no web tags to give air frost day counts). | To see, in the legacy Cumulus 1 software only, number of '''Air Frost days''', use the View menu to select 'This Month', 'This Year' or 'This Period' and choose the precise period of interest using the drop down selectors. (As at build 1058, there are no web tags to give air frost day counts). | ||
The Chill hours web tag with a threshold of 0 degrees Celsius (32 Fahrenheit) will give '''air frost hours''' since the starting month. | The Chill hours web tag with a threshold of 0 degrees Celsius (32 Fahrenheit) will give '''air frost hours''' since the starting month. | ||