See also: ICA&D KNMI Climate Explorer
 
 

Daily data > Data dictionary > Elements

 
 

Elements

Different countries estimate daily average temperatures using different methods and formulae. Also, the time intervals for observing minimum and maximum temperature differ and the time interval for accumulating 24h rainfall differ. The table below describes the different "Ele ID" values available for each element in the database. These recording characteristics are included when downloading the daily data.

 

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Element

Ele ID

Description

Unit

MAXIMUM TEMPERATURE (TX)

 

TX1

Maximum temperature unknown interval

0.1 °C

 

TX2

Maximum temperature 20-20 UT

0.1 °C

 

TX3

Maximum temperature over last 12 hours or 24 hours (GTS values)

0.1 °C

MINIMUM TEMPERATURE (TN)

 

TN1

Minimum temperature unknown interval

0.1 °C

 

TN2

Minimum temperature 20-20 UT

0.1 °C

 

TN3

Minimum temperature over last 12 hours or 24 hours (GTS values)

0.1 °C

MEAN TEMPERATURE (TG)

 

TG1

Mean temperature unknown interval

0.1 °C

 

TG2

Mean temperature calculated as average of TN and TX

0.1 °C

 

TG3

Mean temperature 20-20 UT

0.1 °C

PRECIPITATION AMOUNT (RR)

 

RR1

Precipitation amount unknown interval

0.1 mm

 

RR2

Precipitation amount 20-20 UT

0.1 mm

 

RR3

Precipitation amount 6-6 UT (sum of 6-hourly, 12-hourly or 24-hourly values)

0.1 mm

SEA LEVEL PRESSURE (PP)

 

PP1

Sea level pressure at 12 UT

0.1 hPa

 

PP2

Mean sea level pressure 20-20 UT

0.1 hPa

 

PP3

Mean sea level pressure 0-0 UT

0.1 hPa

RELATIVE HUMIDITY (HU)

 

HU1

Relative humidity unknown interval

%

 

HU2

Relative humidity 20-20 UT

%

 

HU3

Relative humidity 0-0 UT

%

CLOUD COVER (CC)

 

CC1

Cloud cover average of 8:30, 14:30 and 18:30 LT

oktas

 

CC2

Cloud cover 0-0 UT

oktas