Better weather & sea current data

[SteffenME]

If we manage to introduce better weather data with finer resolutions we can expect better results and a simulation with smaller time steps.

[julled]

There is better data in grib2 format from

https://dwd-geoportal.de/products/G_D5M/

we could try to make this useable via

1. grib 2 netCDF converter
   https://confluence.ecmwf.int/display/OIFS/How+to+convert+GRIB+to+netCDF#HowtoconvertGRIBtonetCDF-NCARcommandlanguage(NCL)

or

2. use GRIB2 in OpenDrift: Grib2 files OpenDrift/opendrift#425

[svenseeberg]

We could check if yr.no does provide NetCDF weather data.

• edit: they do, but they only cover the regions around Norway.

[svenseeberg]

https://dwd-geoportal.de/products/G_D5M/

Provides the following data, that is probably interesting for us and covers most of the Mediterranean Sea:

• V - V-Component of Wind
• U - U-Component of Wind

We need to check if OpenDrift can work with this data. An explanation about u and v components can be found here: http://colaweb.gmu.edu/dev/clim301/lectures/wind/wind-uv

[julled]

https://dwd-geoportal.de/products/G_D5M/

Provides the following data, that is probably interesting for us and covers most of the Mediterranean Sea:

* `V - V-Component of Wind`

* `U - U-Component of Wind`

We need to check if OpenDrift can work with this data. An explanation about u and v components can be found here: http://colaweb.gmu.edu/dev/clim301/lectures/wind/wind-uv

OpenDrift/opendrift#425 (comment)

here someone is using U and V wind via grib2 files in opendrift.

[SteffenME]

An explanation is also in their documentation of the model: p. 29:

I tried to download the Data and to me its not straight forward to use them. The reader would not accept it right away, plus i am not sure what to download.

1. But dwd has a help for its open data: opendata@dwd.de I think we should write to them.

2. Someone already wrote tools to download the files, maybe we can use some of it: https://github.com/guidocioni/icon_globe, https://github.com/guidocioni/icon_forecasts

3. Other providers are using the data too and maybe release it in a handy way. For example the university of athens (who also have their own model): https://openskiron.org/en/icon-gribs However this looks like not all the area is supported

[svenseeberg]

2. Someone already wrote tools to download the files, maybe we can use some of it: https://github.com/guidocioni/icon_globe, https://github.com/guidocioni/icon_forecasts

This looks very promising.

[khaliso]

I asked the norwegian weather service (Yr.no) for access to weather data of the mediterranean sea and they pointed me to the MAPS archive at the ECMWF. Normal access costs about 3000€ a year, but I wrote an e-mail to Mr. Manuel Reiter at [EZMW.comprep@dwd.de], as he's listed as the contact person for germany at [https://www.ecmwf.int/en/about/contact-us/computing-representatives].
Sent the mail on the 26th of december 2022, but have not gotten a reply yet.

He works for the DWD as well, so sending an additional mail to opendata@dwd.de might be a good idea

[SteffenME]

I asked the norwegian weather service (Yr.no) for access to weather data of the mediterranean sea and they pointed me to the MAPS archive at the ECMWF. Normal access costs about 3000€ a year, but I wrote an e-mail to Mr. Manuel Reiter at [EZMW.comprep@dwd.de], as he's listed as the contact person for germany at [https://www.ecmwf.int/en/about/contact-us/computing-representatives]. Sent the mail on the 26th of december 2022, but have not gotten a reply yet.

He works for the DWD as well, so sending an additional mail to opendata@dwd.de might be a good idea

I could not find any MAPS archive, only a MARS Catalogue?
Plus what data do they provide?

+1 Sending a Mail to opendata@dwd.de

[svenseeberg]

https://confluence.ecmwf.int/display/UDOC/MARS+content

[svenseeberg]

We want:

• Wind from DWD ICON model. There are global and European models.
• Currents from ECMWF

OpenDrift works best with cf-compliant netCDF

The data can be combined with the Python library xarray