Daily observations in 1km*1km grid

Interpolation

Daily weather station observations have been interpolated into 1km*1km grid using external predictors (e.g., elevation) as covariates (kriging with external drift KED).

Reference: New gridded daily climatology of Finland: Permutation-based uncertainty estimates and temporal trends in climate by Juha Aalto, Pentti Pirinen & Kirsti Jylhä; JGR Atmospheres 07 Apr 2016 (https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JD024651)

Daily gridded evapotranspiration data for Finland for 1981–2020 by Pirinen, P., Lehtonen, I., Heikkinen, R. K., Aapala, K., Aalto, J., (2022) Daily gridded evapotranspiration data for Finland for 1981–2020. FMIs Clim. Bull. Res. Lett. 4. (https://doi.org/10.35614/ISSN-2341-6408-IK-2022-11-RL)

Content

Horizontal resolution 1.0 km.

Projection: epsg:3067 (ETRS89 / TM35FIN(E,N) – Finland)

Data

Daily data is in annual netcdf files. The files are produced by R:s Raster package.

Data will be updated once a year until Jan 2022 and after 8.2.2022 once a month (day number 8 each month)

ET0_FAO	Daily potential evapotranspiration from 12cm high grass according FAO instructions
Globrad	Global radiation sum	kJ/m²
Psea	Sea level air pressure	hPa
RRday	Daily precipitation sum	mm	Value for today: From 06 UTC today to 06UTC tomorrow
Rh	Relative humidity	%	Daily mean 00UTC, 03UTC,…, 18UTC, 21UTC
Snow	Snow depth	cm	Snow depth at 06 UTC
Tday	Daily mean temp.	℃	Daily mean 00UTC, 03UTC,…, 18UTC, 21UTC
Tmax	Daily maximum temp.	℃	Value for today: max from 06 UTC today to 06UTC tomorrow
Tmin	Daily minimum temp	℃	Value for today: min from 06 UTC today to 06UTC tomorrow
Tgmin	Min temp near ground	℃	Value for today: min from 18 UTC yesterday to 06UTC today.

Accessing the Data on AWS

The data is uploaded into an AWS S3 Bucket:

fmi-gridded-obs-daily-1km

Files are named with a convention (using all lower case letters):

<measurand>_<year>.nc

For example:

globrad_1998.nc
rh_2011.nc

The data is stored with the following prefixes:

Netcdf/<measurand>/

For example the file that contains the interpolated snow depth values for the year 1985 has the key Netcdf/Snow/snow_1985.nc

Content of the bucket can be browsed here:

http://fmi-gridded-obs-daily-1km.s3-website-eu-west-1.amazonaws.com/

SNS

The following public Amazon SNS topic is available for every new object added to the Amazon S3.

arn:aws:sns:eu-west-1:462069092803:new-fmi-opendata-gridded-observations-netcdf

For more information on subscribing to SNS topics, visit http://docs.aws.amazon.com/sns/latest/dg/SubscribeTopic.html.

For more information on Amazon S3 event message structure, visit http://docs.aws.amazon.com/AmazonS3/latest/dev/notification-content-structure.html.

More Information

Some usage examples: https://github.com/fmidev/opendata-resources/tree/master/examples/python