NGCD indices access

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This is the download page for the indices derived from the NGCD v19.03 dataset. The datafiles below provide several climate indices (ETCCDI indices marked with *) derived using daily minimum temperature (TN), daily maximum temperature (TX) and daily precipitation sum (RR). They cover Fennoscandia (Finland, Sweden and Norway) with a spatial resolution of 1 x 1 km over the period 1971-01-01 - 2018-12-31. The data files are in NetCDF-4 format, separated in four sets per index: annual, half-yearly, monthly and seasonal. Seasonal indices are calculated from the monthly indices, where for December-January-February (DJF) the December of the previous year is used: Dec(1971)-Jan(1972)-Feb(1972).

More details on the calculation of the indices can be found here.

Terms of use

The NGCD indices dataset is available under the Norwegian Licence for Open Government Data (NLOD) 1.0.

Indices files

Click on an item to view the download links for those indices (Source: MET Norway Thredds Service).

Two different spatial interpolation approaches are applied to produce two versions of the indices dataset. NGCD type 1 of mean, minimum and maximum temperature is based on a residual kriging approach applying five explanatory variables. The weights of the explanatory variables in the trend expression are estimated from long term climatology on a monthly scale. Precipitation is estimated by triangulation with a terrain adjustment.

NGCD type 2 is based on Bayesian spatial interpolation methods. For temperature a two-step scale separation optimal interpolation is applied. The precipitation data is based on a multi-scale optimal interpolation over a cascade of (reducing) spatial scales.

No. of frost days (FD)* Maximum no of consecutive frost days (CFD)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Ice Days (ID)* Heating degree days (HD17*)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Cold Spell Duration Index (WSDI)* Alternative Cold Spell Duration Index (altCSDI)
Annual Annual
No. of cold nights (TN10p)* No. of cold day-times (TX10p)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Minimum of daily minimum temperature (TNn)* Minimum of daily maximum temperature (TXn)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Growing season length (GSL)*
Annual
No. of summer days (SU)* No. of tropical nights (TR)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Maximum of daily maximum temperature (TXx)* Maximum of daily minimum temperature (TNx)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
No. of warm nights (TN90p)* No. of warm day-times (TX90p)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Warm Spell Duration Index (WSDI)* Alternative Warm Spell Duration Index (altWSDI)
Annual Annual
Consecutive summer days (CSU)
Annual
Half-yearly
Monthly
Seasonal
Mean of diurnal temperature range (DTR)* Huglin Index (HI)
Annual Annual
Half-yearly
Monthly
Seasonal
Maximum no. of consecutive dry days (CDD)* Alternative Maximum no. of consecutive dry days (altCDD)
Annual Annual
3-month Standardized Precipitation Index (SPI3) 6-month Standardized Precipitation Index (SPI6)
Monthly Monthly
Highest 1-day precipitation amount (RX1day)* Highest 5-day precipitation amount (RX5day)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Simple Daily Intensity (SDII)* No. of wet days (R1mm)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Heavy precipitation days (R10mm)* Very heavy precipitation days (R20mm)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Maximum no. of consecutive wet days (CWD)* Alternative Maximum no. of consecutive wet days (altCWD)
Annual Annual
Precipitation due to moderate wet days (R75pTOT) Fraction of precipitation due to moderate wet days (R75pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to very wet days (R95pTOT)* Fraction of precipitation due to very wet days (R95pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to extremely wet days (R99pTOT)* Fraction of precipitation due to extremely wet days (R99pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to wet days (PRCPTOT)*
Annual
Half-yearly
Monthly
Seasonal


No. of frost days (FD)* Maximum no of consecutive frost days (CFD)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Ice Days (ID)* Heating degree days (HD17*)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Cold Spell Duration Index (WSDI)* Alternative Cold Spell Duration Index (altCSDI)
Annual Annual
No. of cold nights (TN10p)* No. of cold day-times (TX10p)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Minimum of daily minimum temperature (TNn)* Minimum of daily maximum temperature (TXn)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Growing season length (GSL)*
Annual
No. of summer days (SU)* No. of tropical nights (TR)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Maximum of daily maximum temperature (TXx)* Maximum of daily minimum temperature (TNx)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
No. of warm nights (TN90p)* No. of warm day-times (TX90p)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Warm Spell Duration Index (WSDI)* Alternative Warm Spell Duration Index (altWSDI)
Annual Annual
Consecutive summer days (CSU)
Annual
Half-yearly
Monthly
Seasonal
Mean of diurnal temperature range (DTR)* Huglin Index (HI)
Annual Annual
Half-yearly
Monthly
Seasonal
Maximum no. of consecutive dry days (CDD)* Alternative Maximum no. of consecutive dry days (altCDD)
Annual Annual
3-month Standardized Precipitation Index (SPI3) 6-month Standardized Precipitation Index (SPI6)
Monthly Monthly
Highest 1-day precipitation amount (RX1day)* Highest 5-day precipitation amount (RX5day)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Simple Daily Intensity (SDII)* No. of wet days (R1mm)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Heavy precipitation days (R10mm)* Very heavy precipitation days (R20mm)*
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Maximum no. of consecutive wet days (CWD)* Alternative Maximum no. of consecutive wet days (altCWD)
Annual Annual
Precipitation due to moderate wet days (R75pTOT) Fraction of precipitation due to moderate wet days (R75pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to very wet days (R95pTOT)* Fraction of precipitation due to very wet days (R95pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to extremely wet days (R99pTOT)* Fraction of precipitation due to extremely wet days (R99pFRAC)
Annual Annual
Half-yearly Half-yearly
Monthly Monthly
Seasonal Seasonal
Precipitation due to wet days (PRCPTOT)*
Annual
Half-yearly
Monthly
Seasonal

News

24 October 2019
10 October 2019
Monthly E-OBS update released
7 October 2019
E-OBS v20.0e has been extended with global radiation fields
7 October 2019
E-OBS v20.0e released
30 September 2019
NGCD v19.09 released
23 September 2019
12 September 2019
Monthly E-OBS update released
26 August 2019
21 August 2019
Tables with observed temperature extremes have been added
21 August 2019
Monthly E-OBS update released
22 July 2019
15 July 2019
Monthly E-OBS update released
8 July 2019
Figures for Indices based on APGD have been added
25 June 2019
24 June 2019
13 June 2019
Monthly E-OBS update released
29 May 2019
Access page for the long-term Alpine precipitation reconstruction (LAPrec) has been created
29 May 2019
13 May 2019
Monthly E-OBS update released