Variables
Table of Contents
- Historical Archive 2021
- Historical Archive 2020
- Historical Archive 2018
- Climate indices
- Percentiles
- Return levels
- Notes
Operational updates version 21.09(21.10) (historical archive available on Zenodo, click on the DOIs)
| VAR | nc | description | Time period | DOI | daily updates | unit |
|---|---|---|---|---|---|---|
| TG | tg | Mean temperature (yesterday at 06 UTC / today at 06 UTC) | 1957-2020 |  |
2021-01-01, today | Celsius degrees |
| TM | tm | Mean temperature (today at 00 UTC / today at 24 UTC) | 1957-2020 |  |
none | Celsius degrees |
| TX | tx | Maximum temperature consistent with TG/TN (yesterday at 18 UTC / today at 18 UTC) | 1957-2020 |  |
2021-01-01, today | Celsius degrees |
| TXa | txa | Maximum temperature without checking for consistency with TG/TM/TN | 1957-2020 |  |
none | Celsius degrees |
| TXb | txb | Maximum temperature consistent with TM/TN | 1957-2020 |  |
none | Celsius degrees |
| TN | tn | Minimum temperature consistent with TG/TX (yesterday at 18 UTC / today at 18 UTC) | 1957-2020 |  |
2021-01-01, today | Celsius degrees |
| TNa | tna | Minimum temperature without checking for consistency with TG/TM/TX | 1957-2020 |  |
none | Celsius degrees |
| TNb | tnb | Minimum temperature consistent with TM/TX | 1957-2020 |  |
none | Celsius degrees |
| RR | rr | Daily total of precipitation (precipitation day definition: yesterday at 06 UTC / today at 06 UTC) | 1957-2020 |  |
2021-01-01, today | mm/day |
| RRa | rra | Daily total of precipitation without adjustment for the wind undercatch | 1957-2020 | |
none | mm/day |
Archive version 20.05 (available on Zenodo, click on the DOIs)
| VAR | nc | description | Time period | DOI | daily updates | unit |
|---|---|---|---|---|---|---|
| TG | tg | Mean temperature (yesterday at 06 UTC / today at 06 UTC) | 1957-2019 |  |
none | Celsius degrees |
| TX | tx | Maximum temperature (yesterday at 18 UTC / today at 18 UTC) | 1957-2019 |  |
none | Celsius degrees |
| TX alt | txa | Maximum temperature without checking for consistency with TG/TN | 1957-2019 | |
none | Celsius degrees |
| TN | tn | Minimum temperature (yesterday at 18 UTC / today at 18 UTC) | 1957-2019 |  |
none | Celsius degrees |
| TN alt | tna | Minimum temperature without checking for consistency with TG/TX | 1957-2019 | |
none | Celsius degrees |
| RR | rr | Daily total of precipitation (precipitation day definition: yesterday at 06 UTC / today at 06 UTC) | 1957-2019 |  |
none | mm/day |
| RR alt | rra | Daily total of precipitation without adjustment for the wind undercatch | 1957-2019 | |
none | mm/day |
Archive version 18.12 (available on Zenodo, click on the DOIs)
| VAR | nc | description | Time period | DOI | daily updates | unit |
|---|---|---|---|---|---|---|
| TG | tg | Mean temperature (yesterday at 06 UTC / today at 06 UTC) | 1957-2017 |  |
none | Celsius degrees |
| TX | tx | Maximum temperature (yesterday at 18 UTC / today at 18 UTC) | 1957-2017 |  |
none | Celsius degrees |
| TN | tn | Minimum temperature (yesterday at 18 UTC / today at 18 UTC) | 1957-2017 |  |
none | Celsius degrees |
| RR | rr | Daily total of precipitation (precipitation day definition: yesterday at 06 UTC / today at 06 UTC) | 1957-2017 |  |
none | mm/day |
Climate Change Indices. The definitions of the core indices can be found at ETCCDI web page.
Percentile classes for daily aggregated values. Based on the reference time period 1991-2020 and version 21.09. Summary of the calculation procedure. Consider: one daily variable (RR, TG, TX or TN),
| VAR | nc | description | Reference time period | DOI | daily updates | unit |
|---|---|---|---|---|---|---|
| RRQ | rrq | daily total precipitation percentile class. Classes are: 1 = smaller than 75%, 2 = between 75% and 90%, 3 = between 90% and 95%, 4 = between 95% and 99%, 5 = greater than 99% | 1991-2020 | - | 2022-04-01, today | 1 |
| TGQ | tgq | mean daily air temperature percentile class. Classes are: 1 = smaller than 1%, 2 = between 5% and 10%, 3 = between 10% and 25%, 4 = between 25% and 50%, 5 = between 50% and 75%, 6 = between 75% and 90%, 7 = between 95% and 99%, 8 = greater than 99% | 1991-2020 | - | 2022-04-01, today | 1 |
| TXQ | txq | maximum daily air temperature percentile class. Classes are: 1 = smaller than 1%, 2 = between 5% and 10%, 3 = between 10% and 25%, 4 = between 25% and 50%, 5 = between 50% and 75%, 6 = between 75% and 90%, 7 = between 95% and 99%, 8 = greater than 99% | 1991-2020 | - | 2022-04-01, today | 1 |
| TNQ | tnq | minimum daily air temperature percentile class. Classes are: 1 = smaller than 1%, 2 = between 5% and 10%, 3 = between 10% and 25%, 4 = between 25% and 50%, 5 = between 50% and 75%, 6 = between 75% and 90%, 7 = between 95% and 99%, 8 = greater than 99% | 1991-2020 | - | 2022-04-01, today | 1 |
Return levels for daily precipitation totals based on version 20.05.
| VAR | nc | description | Reference time period | file | daily updates | unit |
|---|---|---|---|---|---|---|
| M5rr1d | M5 | 5-year return level | 1991-2020 | M5rr1d-nc | - | mm |
| M10rr1d | M10 | 10-year return level | 1991-2020 | M10rr1d-nc | - | mm |
| M50rr1d | M50 | 50-year return level | 1991-2020 | M50rr1d-nc | - | mm |
- "nc" is the abbreviation used in the netcdf files
- The observations undergo an automatic quality control procedure TITAN.
- The precipitation observations are adjusted for the wind-induced undercatch, unless otherwise specified.