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