Quality Flags

For a detailed description of the methodology behind the quality flags we refer to:

Dorigo, W.A. , Xaver, A. Vreugdenhil, M. Gruber, A., Hegyiová, A. Sanchis-Dufau, A.D., Zamojski, D. , Cordes, C., Wagner, W., and Drusch, M. (2013). Global Automated Quality Control of In Situ Soil Moisture data from the International Soil Moisture Network. Vadose Zone Journal, 12, 3, doi:10.2136/vzj2012.0097

!! This paper shall be cited when you use the quality flags for your research. !!

variable

flag category

flag

flag is set if following condition is met

soil moisture

C - reported value exceeds output format field size

C01

soil moisture < 0.0 m3/m3

 

 

C02

soil moisture > 0.6 m3/m3

 

 

C03

soil moisture > saturation point (derived from HWSD parameter values)

 

D - questionable/dubious - geophysical based

D01

in situ soil temperature(*) < 0°C

 

 

D02

in situ air temperature < 0°C

 

 

D03

GLDAS soil temperature(*) < 0°C

 

 

D04

soil moisture shows peaks without precipitation event (in situ) in the preceeding 24 hours

 

 

D05

soil moisture shows peaks without precipitation event (GLDAS) in the preceeding 24 hours

 

D - questionable/dubious - spectrum based

D06

a spike is detected in soil moisture spectrum

 

 

D07

a negative jump is detected in soil moisture spectrum

 

 

D08

a positive jump is detected in soil moisture spectrum

 

 

D09

low constant values (for a minimum time of 12 hours) occur in soil moisture spectrum

 

 

D10

saturated plateau (for a minimum time length of 12 hours) occurs in soil moisture spectrum

 

 

 

(*) at corresponding depth layer

soil temperature

C - reported value exceeds output format field size

C01

soil temperature < -60°C

 

 

C02

soil temperature > 60°C

soil surface temperature

C - reported value exceeds output format field size

C01

soil surface temperature < -60°C

 

 

C02

soil surface temperature > 60°C

air temperature

C - reported value exceeds output format field size

C01

air temperature < -60°C

 

 

C02

air temperature > 60°C

precipitation

C - reported value exceeds output format field size

C01

precipitation < 0 mm/h

 

 

C02

precipitation > 100 mm/h

soil suction

C - reported value exceeds output format field size

C01

soil suction < 0 kPa

 

 

C02

soil suction > 2500 kPa

snow water equivalent

C - reported value exceeds output format field size

C01

snow water equivalent < 0 mm

snow depth

C - reported value exceeds output format field size

C01

snow depth < 0 mm

all dynamic variables

 

M

parameter value missing

 

 

G

good