See also: KNMI Climate Explorer ICA&D C3S2_311_Lot3
 
 

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 18-18 UT

0.1 °C

 

TX3

Maximum temperature 0-0 UT

0.1 °C

 

TX5

Maximum temperature morning previous day 06,07,08 until morning today (shifted 1 day back by ECA staff)

0.1 °C

 

TX6

Maximum temperature morning today 06,07,08 until morning next day

0.1 °C

 

TX7

Maximum temperature between 06 and 18 UT today

0.1 °C

 

TX8

Maximum temperature 21-21 CET

0.1 °C

 

TX9

Maximum temperature morning previous day 09 h GMT until morning today (shifted 1 day back by ECA staff)

0.1 °C

 

TX10

Maximum temperature from 21:30 previous day until 21:30 CET

0.1 °C

 

TX11

Maximum temperature morning today 9 UTC until morning next day

0.1 °C

 

TX12

Maximum temperature 19-19 UTC

0.1 °C

 

TX13

Maximum temperature within 00-24, 12-12 or 06-06

0.1 °C

 

TX14

Maximum temperature 0-0 LT based on hourly intervals

0.1 °C

 

TX15

Maximum temperature 17-17 CET

0.1 °C

 

TX16

Maximum temperature 22-22 or 23-23 UT

0.1 °C

 

TX17

Maximum temperature 18-18 CET

0.1 °C

 

TX18

Maximum temperature 15-15 UTC

0.1 °C

 

TX19

Maximum temperature 22-21 UT

0.1 °C

 

TX20

Maximum temperature 19-19 CET

0.1 °C

 

TX21

Maximum temperature 0-0 UT aggregated from 5,10,15 or 30 minute values

0.1 °C

MINIMUM TEMPERATURE (TN)

 

TN1

Minimum temperature unknown interval

0.1 °C

 

TN2

Minimum temperature 18-18 UT

0.1 °C

 

TN3

Minimum temperature 0-0 UT

0.1 °C

 

TN5

Minimum temperature morning previous day 06,07,08 until morning day

0.1 °C

 

TN6

Minimum temperature between 18 UT previous day and 06 UT today

0.1 °C

 

TN8

Minimum temperature 21-21 CET

0.1 °C

 

TN9

Minimum temperature morning previous day 09 h GMT until morning today

0.1 °C

 

TN10

Minimum temperature from 21:30 previous day until 21:30 CET

0.1 °C

 

TN11

Minimum temperature 19-19 UTC

0.1 °C

 

TN12

Minimum temperature within 00-24, 12-12 or 18-18

0.1 °C

 

TN13

Minimum temperature 0-0 LT based on hourly intervals

0.1 °C

 

TN14

Minimum temperature 17-17 CET

0.1 °C

 

TN15

Minimum temperature 22-22 or 23-23 UT

0.1 °C

 

TN16

Minimum temperature 15-15 UTC

0.1 °C

 

TN17

Minimum temperature 22-21 UT

0.1 °C

 

TN18

Minimum temperature 19-19 CET

0.1 °C

 

TN19

Minimum temperature 0-0 UT aggregated from 5,10,15 or 30 minute values

0.1 °C

MEAN TEMPERATURE (TG)

 

TG1

Mean temperature unknown interval

0.1 °C

 

TG3

Mean temperature 0-0 UT

0.1 °C

 

TG5

Mean temperature calculated as average of TN and TX

0.1 °C

 

TG6

Mean temperature calculated as weighted average of TN, TX and observations at 06, 12 and 18 UT (5 values)

0.1 °C

 

TG7

Mean temperature calculated as average of 3 or more observations each day

0.1 °C

 

TG8

Mean temperature calculated as weighted average of 06, 13 and 20 (twice) UTC

0.1 °C

 

TG9

Mean temperature 06-06 UTC

0.1 °C

 

TG10

Mean temperature calculated as weighted average of 07:30, 14:30 and 21:30 (twice) CET

0.1 °C

 

TG11

Mean temperature 18-18 UT

0.1 °C

 

TG12

Mean temperature calculated as average of 00, 06, 12, 18 UTC

0.1 °C

 

TG13

Mean temperature calculated as average of 01, 07, 13 and 19 UT

0.1 °C

 

TG14

Mean temperature calculated as average of 07, 14, 21, 21 CET

0.1 °C

 

TG15

Mean temperature calculated as average of 8 observations

0.1 °C

 

TG16

Mean temperature calculated as average of 07, 14, 21 CET

0.1 °C

 

TG17

Mean temperature calculated as average of 09 LT, 21 LT, Tmax and Tmin

0.1 °C

 

TG18

Mean temperature calculated as average of 08 LT, 19 LT, Tmax and Tmin

0.1 °C

 

TG19

Mean temperature calculated as average of 21, 03, 09 and 15UTC

0.1 °C

 

TG20

Mean temperature calculated as average of 18, 21, 00, 03, 06, 09, 12 and 15UTC

0.1 °C

 

TG21

Mean temperature calculated as average of 24 hourly values (0 - 0 UTC)

0.1 °C

 

TG22

Mean temperature calculated as average of 24 hourly values 23-22 UT

0.1 °C

 

TG23

Mean temperature 0 - 0 local time (with changes to winter and summer time)

0.1 °C

 

TG24

Mean temperature 0-0 UT average from 5,10,15 or 30 minute values

0.1 °C

SUNSHINE (SS)

 

SS1

Daily sunshine

0.1 Hours

 

SS2

Daily sunshine, unknown interval

0.1 Hours

 

SS3

Daily sunshine, 0-0 UT

0.1 Hours

 

SS4

Daily sunshine 18-18 UT

0.1 Hours

 

SS5

Daily sunshine 21-21 CET

0.1 Hours

 

SS6

Daily sunshine 0 - 0 local time (with changes to winter and summer time)

0.1 Hours

SNOW DEPTH (SD)

 

SD1

Mean daily snow depth, 0-0 UT

1 cm

 

SD2

Mean daily snow depth, unknown interval

1 cm

 

SD3

Snow depth at 6,7,8 am (local time)

1 cm

 

SD4

Snow depth at 07:30 CET

1 cm

 

SD5

Snow depth at 6 UTC

1 cm

 

SD6

Snow depth at 12 UTC

1 cm

 

SD7

Snow depth at 05:40 UTC

1 cm

 

SD8

Snow depth at 9 UTC

1 cm

 

SD9

Mean daily snow depth, 22 UT-21 UT (24 values)

1 cm

 

SD10

Snow depth at 07:00 CET

1 cm

 

SD11

Mean snow depth 6 - 6 UTC next day

1 cm

 

SD12

Average Snow depth 0 - 0 UT

cm

PRECIPITATION AMOUNT (RR)

 

RR1

Precipitation amount unknown interval

0.1 mm

 

RR2

Precipitation amount morning previous day 06,07,08,09 until morning today (shifted 1 day back by ECA staff)

0.1 mm

 

RR3

Precipitation amount morning today 06,07,08 until morning next day

0.1 mm

 

RR4

Sum of 12-hourly precipitation of observations at 06 and 18 UT (2 values). Date of 18 UT

0.1 mm

 

RR5

Precipitation amount morning today 07:30 CET until morning next day

0.1 mm

 

RR6

Precipitation amount 18-18 UT (sum of 4 values)

0.1 mm

 

RR7

Precipitation amount 0 - 0 UT

0.1 mm

 

RR8

Sum of 12-hourly precipitation of observations at 18 UT today and 6 UT tomorrow (2 values)

0.1 mm

 

RR9

Precipitation amount morning today 06:00 UTC until morning next day

0.1 mm

 

RR10

Precipitation amount within 00-24, 07-07 or 08-08

0.1 mm

 

RR11

Precipitation amount morning today 05:40 UTC until morning following day

0.1 mm

 

RR12

Precipitation amount 12 UT yesterday until 12 UT today

0.1 mm

 

RR13

Precipitation amount 22-22 or 23-23 UT

0.1 mm

 

RR14

Precipitation amount 18 UT yesterday until 18 UT today

0.1 mm

 

RR15

Precipitation amount 21 UT yesterday until 21 UT today

0.1 mm

 

RR16

Precipitation amount 15 UTC yesterday until 15 UTC today

0.1 mm

 

RR17

Precipitation amount from 24 hourly values, 22-21 UT

0.1 mm

 

RR18

Precipitation amount morning today 07:00 CET until morning next day

0.1 mm

 

RR19

Precipitation amount 0 - 0 local time (with changes to winter and summer time)

0.1 mm

 

RR20

Precipitation amount from 12:00 pm to 12:00 pm next day in UTC

0.1 mm

 

RR21

Precipitation 0-0 UT from 5,10,15 or 30 minute values

0.1 mm

 

RR22

Precipitation amount morning previous day 09 until morning today (shifted 1 day back by ECA staff)

0.1 mm

GLOBAL RADIATION (QQ)

 

QQ2

Global radiation amount 0 - 0 UTC

W/m2

 

QQ3

Mean of 24 hourly global radiation measurements

W/m2

 

QQ4

Mean of 1440 one-minute global radiation measurements

W/m2

 

QQ5

24-hour average of global radiation

W/m2

 

QQ1

Global radiation amount 0 - 0 UTC

W/m2

 

QQ6

Global radiation amount 0 - 0 UTC derived from sunshine duration

W/m2

 

QQ7

Mean global radiation 0 - 0 local time (with changes to winter and summer time)

W/m2

SEA LEVEL PRESSURE (PP)

 

PP1

Sea level pressure at 12 UT

0.1 hPa

 

PP2

Mean sea level pressure, 0-0 UT

0.1 hPa

 

PP3

Mean sea level pressure calculated as weighted average of observations at 00, 06, 12 and 18 UT (4 values)

0.1 hPa

 

PP4

Sea level pressure at 06 UT

0.1 hPa

 

PP5

Sea level pressure, mean of 13, 20 UT previous day and 7 UT current day (shifted 1 day back by ECA staff)

0.1 hPa

 

PP7

Mean sea level pressure calculated as weighted average of observations at 00, 07, 13 and 18 UT (4 values)

0.1 hPa

 

PP8

Mean sea level pressure unknown interval

0.1 hPa

 

PP9

Sea level pressure, mean of 06, 13 and 20 UTC of the current day

0.1 hPa

 

PP10

Sea level pressure, mean of 7:30, 14:30 and 21:30 CET

0.1 hPa

 

PP11

Sea level pressure, mean 18-18 UT

0.1 hPa

 

PP12

Sea level pressure, mean of 8:00 and 13:00 local time

0.1 hPa

 

PP13

Mean sea level pressure, 21-21 UTC (8 values)

0.1 hPa

 

PP14

Mean sea level pressure, 23-22 UTC (24 values)

0.1 hPa

 

PP15

Mean sea level pressure, mean of 7, 13, 20 UT current day

0.1 hPa

 

PP16

Mean sea level pressure, mean of daily minimum and maximum pressure

0.1 hPa

 

PP17

Mean sea level pressure, average of 7, 14 and 19 UT

0.1 hPa

 

PP18

Mean sea level pressure, average of 6, 12 and 18 UT

0.1 hPa

 

PP19

Mean sea level pressure calculated as average of 8 observations

0.1 hPa

 

PP20

Mean sea level pressure, mean of 7, 14, 21 UT current day

0.1 hPa

 

PP21

Mean sea level pressure calculated as average of observations at 07, 13 and 18 UT (3 values)

0.1 hPa

 

PP22

Sea level pressure at 9 AM LT

0.1 hPa

 

PP23

Mean sea level pressure, 0-0 UTC (8 values)

0.1 hPa

 

PP24

Mean sea level pressure, mean of 9, 15, 21 LT

0.1 hPa

 

PP25

Mean sea level pressure, mean of 8, 14, 19 LT

0.1 hPa

 

PP26

Mean sea level pressure, mean of 21, 03, 09 and 15UTC

0.1 hPa

 

PP27

Mean sea level pressure, mean of 18, 21, 00, 03, 06, 09, 12 and 15UTC

0.1 hPa

 

PP28

Mean sea level pressure, average of 7, 14 and 19 CET

0.1 hPa

 

PP29

Mean sea level pressure 0 - 0 local time (with changes to winter and summer time)

0.1 hPa

 

PP30

Mean sea level pressure 0 - 0 UT average from 5,10,15 or 30 minute values

0.1 hPa

HUMIDITY (HU)

 

HU1

Relative humidity, mean of 0,7,13 18 UT current day

1 %

 

HU2

Relative humidity, unknown interval

1 %

 

HU3

Mean relative humidity, 0-0 UT

1 %

 

HU4

Relative humidity, average of 07:30, 14:30 and 21:30 CET

1 %

 

HU5

Relative humidity, mean of 7, 14 and 21 UTC

1 %

 

HU6

Relative humidity, mean 18-18 UT

1 %

 

HU7

Relative humidity, mean of 7, 14 and 21 CET

1 %

 

HU8

Relative humidity, 23-22 UTC (24 values)

1 %

 

HU9

Relative humidity, mean of 7, 14 and 19 UT

1 %

 

HU10

Relative humidity at 9.00 AM

1 %

 

HU11

Relative humidity at 21.00

1 %

 

HU12

Relative humidity at 9 AM LT calculated from dewpoint and air temperature

1 %

 

HU13

Mean relative humidity, 0-0 UTC (8 values)

1 %

 

HU14

Relative humidity, mean of 9, 15, 21 LT

1 %

 

HU15

Relative humidity, mean of 8, 14, 19 LT

1 %

 

HU16

Relative humidity, mean of 21, 03, 09 and 15UTC

1 %

 

HU17

Relative humidity, mean of 18, 21, 00, 03, 06, 09, 12 and 15UTC

1 %

 

HU18

Relative humidity, mean of 7, 14 and 19 CET

1 %

 

HU19

Mean relative humidity 0 - 0 local time (with changes to winter and summer time)

1 %

 

HU20

Mean relative humidity 0 - 0 UT average from 5,10,15 or 30 minute values

1 %

 

HU21

Mean relative humidity 0-0 UT average from 5,10,15 or 30 minute values

1 %

WIND GUST (FX)

 

FX1

Maximum 3 second wind gust, 0-0 UT

0.1 m/s

 

FX2

Maximum 2 second wind gust, 0-0 UT

0.1 m/s

 

FX3

Maximum 10 second wind gust, 18-18 UT

0.1 m/s

 

FX4

Maximum value of wind gust speeds 18 - 18 UT

0.1 m/s

 

FX5

Maximum 3 second wind gust, 18-18 UT

0.1 m/s

 

FX6

Average wind gust from 23 UT previous day - 22 UT today (24 values)

0.1 m/s

 

FX7

Maximum value of 15-min wind speed measurements, 0-0 LT

0.1 m/s

 

FX8

Maximum 3 second wind gust, 9-9 LT

0.1 m/s

 

FX9

Maximum 3 second wind gust, 15-15 UTC

0.1 m/s

 

FX10

Maximum wind gust 22 UT - 21 UT

0.1 m/s

 

FX11

Maximum wind gust 0-0 CET

0.1 m/s

 

FX12

Maximum 3 second wind gust 0 - 0 local time (with changes to winter and summer time)

0.1 m/s

 

FX13

Maximum value of 5,10,15 or 30 minut wind speed measurements, 0-0 UT

0.1 m/s

 

FX14

Maximum value of 1 second wind gust, 0-24CET

0.1 m/s

 

FX15

Maximum wind gust, unknown interval

0.1 m/s

WIND SPEED (FG)

 

FG1

Average wind speed of 24 hourly measurements of 10-min average (0-0 UT)

0.1 m/s

 

FG2

Average wind speed of measurements at 06, 12, 18, (00) UTC

0.1 m/s

 

FG3

Average wind speed of 3 measurements at 06.30, 13.30 and 20.30 UTC

0.1 m/s

 

FG4

Average wind speed, mean of 7, 14 and 21 CET

0.1 m/s

 

FG5

Average wind speed 18 - 18 UT, 8 3-hourly observations

0.1 m/s

 

FG6

Average wind speed, mean of 4 10-min averages of 00, 07, 13 and 18 UT

0.1 m/s

 

FG7

Average wind speed of 24 hourly measurements (6 10-min average per hour) 0-0 UT

0.1 m/s

 

FG8

Average 10-minute wind speed from 23 UT previous day - 22 UT today (24 values)

0.1 m/s

 

FG9

Average from 07h to 07h through a mechanical counter

0.1 m/s

 

FG10

Average wind speed of 24 hourly measurements of 15-min average (0-0 LT)

0.1 m/s

 

FG11

wind speed at 9 AM LT

0.1 m/s

 

FG12

Average wind speed of 8 measurements of 10-min average (0-0 UT)

0.1 m/s

 

FG13

Average wind speed, mean of 9, 15 and 21 LT

0.1 m/s

 

FG14

Average wind speed, mean of 8, 14 and 19 LT

0.1 m/s

 

FG15

Average wind speed of measurements at 21, 03, 09 and 15UTC

0.1 m/s

 

FG16

Average wind speed of measurements at 18, 21, 00, 03, 06, 09, 12 and 15UTC

0.1 m/s

 

FG17

Average wind speed unknown interval

0.1 m/s

 

FG18

Average wind speed, mean of 7, 14 and 19 CET

0.1 m/s

 

FG19

Average wind speed 0 - 0 local time (with changes to winter and summer time)

0.1 m/s

 

FG20

Average windspeed 0-0 UT average from 5,10,15 or 30 minute values

0.1 m/s

WIND DIRECTION (DD)

 

DD1

Average vectorial wind direction calculated from 3 measurements at 06, 12 and 18 UTC.

degrees

 

DD2

Wind direction at time of maximum gust

degrees

 

DD3

Average vectorial wind-speed-weighted wind direction calculated from 3 measurements at 06.30, 13.30 and 20.30 UTC

degrees

 

DD4

Wind direction at 12 UTC

degrees

 

DD5

Average wind direction, mean of 00, 07, 13 and 18UT

degrees

 

DD6

Average vectorial 10-minutes wind direction, 0 - 0 UTC

degrees

 

DD7

Average vectorial 2-minute wind direction from 23 UT previous day - 22 UT today (24 values)

degrees

 

DD8

Wind direction at 14 LT

degrees

 

DD9

Wind direction at 9 AM LT

degrees

 

DD10

Wind direction at 15 LT

degrees

 

DD11

Mean wind direction 0 - 0 local time (with changes to winter and summer time)

degrees

 

DD12

Mean wind direction 0 - 0 UT

degrees

 

DD13

Average wind direction, unknown interval

degrees

 

DD14

Prevailing wind direction, 0-24CET

degrees

CLOUD COVER (CC)

 

CC1

Mean daily cloud cover, 0-0 UT

oktas

 

CC2

Mean daily cloud cover, mean of 7, 13, 18 UT current day

oktas

 

CC3

Mean daily cloud cover, unknown interval

oktas

 

CC4

Mean daily cloud cover, mean of 7, 13, 20 UT current day

oktas

 

CC5

Mean daily cloud cover, average of 07:30, 14:30 and 21:30 CET

oktas

 

CC6

Mean daily cloud cover, mean of 7, 14 and 21 UTC

oktas

 

CC7

Mean daily cloud cover, 18-18 UT

oktas

 

CC8

Mean daily cloud cover, average of 00, 13 and 18 UT

oktas

 

CC9

Mean daily cloud cover, average of 0, 6, 12 and 18 UTC

oktas

 

CC10

Mean daily cloud cover, 23-23 UTC (24 values)

oktas

 

CC11

Mean daily cloud cover, average of 3-hourly values, 0-0 UTC

oktas

 

CC12

Mean daily cloud cover, average of 7, 14 and 19 UT

oktas

 

CC13

Mean daily cloud cover, average of 6, 12 and 18 UTC

oktas

 

CC14

Mean daily cloud cover, mean of 7, 14, 21 CET

oktas

 

CC15

Mean daily cloud cover, mean of 8, 14 CET

oktas

 

CC16

Mean daily cloud cover, mean of 9, 15 CET

oktas

 

CC17

Mean daily cloud cover, average of 3,6,9,12,15,18,21,24 UT

oktas

 

CC18

Mean daily cloud cover, average of 9, 15, 21 LT

oktas

 

CC19

Mean daily cloud cover, average of 8, 14, 19 LT

oktas

 

CC20

Cloud cover measured at 9 AM LT

oktas

 

CC21

Mean daily cloud cover, 00-21 LT (8 values)

oktas

 

CC22

Mean daily cloud cover, 21 UT-18 UT (8 values)

oktas

 

CC23

Mean daily cloud cover, average of 7, 14 and 19 CET

oktas