Issue with MERRA2 data from June 2021 to September 2021!

Dear windPRO online-data user

NASA has notified us about an issue with the MERRA2 data from a four month period ranging from June 2021 to September 2021. The issue is caused by an error in the MERRA2 pre-processing of ocean buoys observations of near-surface temperatures - resulting in significant near-surface temperature biases in various regions.

It is currently not clear to EMD if other parameters than near-surface temperatures are also influenced, and if so, to which degree. As a consequence, MERRA2 data from June-September 2021 has now been removed from the windPRO online-data services. For users who have downloaded these MERRA2 containing the four months above, we recommend that you consider taking the following actions with your windPRO project:

  • Remove the MERRA2-data for the months of June 2021 - September 2021
  • Redo any calculations or reports where you have used these months

We will send out a new notification when corrected MERRA2 data for June 2021 - September 2021 has become available from NASA sources. According to NASA, the corrected data is likely to be released during mid-December 2021. More information is available at the windPRO wiki: here.

Best regards,
The windPRO online data team
support@emd.dk