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Climate data measured by automatic Thies weather station of the working group B2.

The data are quality checked by a standardised method.

Climate Parameter Quality Check for site Cajanuma Horst
Checking modules:

1. Does a value exist?
Quality flag is set to 
"d = missing"

2. Checking of site specific threshold value.
If the value is not inbetween the thresholds the quality flag is set to "c = out of range":
Windspeed max = 20
Global Radiation max = 1300
Air temperature in 2m max = 20
Air temperature in 2m min = 2
Air temperature in 30cm max = 25
Air temperature in 30cm min = 0
Air humidity in 2m max = 100
Air humidity in 2m min = 10
Air humidity in 30cm max = 100
Air humidity in 30cm min = 10

3. Checking the plausibility of air temperature and air humidity within the measurement intervals by comparing the previous and current values.
If the temperature amplitude is higher then 10°C and humidity amplitude is higher than 30% the plausibility of this variation is checked by comparing to the variation of the other parameter.  
The quality flag is set to "e = variation implausible".

4. Precipitation check
If precipitation is more than 20 mm then quality flag is set to "c = out of range"
If precipitation is more than 15 mm and air temperature increases more than 0.2 °C inbetween a temporal interval then quality flag is set to "e = variation impossible".

5. Wind direction and soil moisture is not quality checked and flag is set to "nqc = not quality checked"

All other values are set to "a = valid".