Detailed information on the YOPP SiteMIP activity is available at https://www.polarprediction.net/key-yopp-activities/yoppsitemip/. The focus of this information is how to provide YOPP SiteMIP data, observations and model output, to the YOPP data portal. These data will be hosted by the Norwegian Meteorological Institute and served through a THREDDS Data Server enabling OPeNDAP access to the data.

From the YOPP news section at https://www.polarprediction.net/news/:

MET Norway and the YOPP International Coordination Office are publishing the first of a series of video tutorials on how data can be searched in the YOPP Data Portal. YOPP maintains this metadata portal as an overview archive for Arctic and Antarctic data generated during the Year of Polar Prediction. The community is invited to find YOPP data from a specific area or time to use for their various purposes.

Bauer, P., Sandu, I., Magnusson, L. et al. ECMWF global coupled atmosphere, ocean and sea-ice dataset for the Year of Polar Prediction 2017–2020. Sci Data 7, 427 (2020). https://doi.org/10.1038/s41597-020-00765-y

The Iceland Greenland Seas Project (IGP) has added 4 datasets. These are served from contributing data centres and further information is available at https://yopp.met.no/metadata_search/?quid=3143132bf3a94052d2dfbf17cbe15fb3c0e37f26f7429a25194c21ef6cba24c61598977038.

First week of July the search interface and results tabulation was updated. The search interfaces has received

• improved support in the map search (including map projections),
• the list of institutions is made more manageable,
• all fileds are expanded by default but can be collapsed by the user,

results tabulation now includes

• a map presentation of location of datasets
• improved visualisation of time series which now includes dynamic plotting (including readout of values)
• improved data dump to CSV

The YOPP Guidance for Data Centres manual has been updated. The updated manual is available at here. Specific elements that are updated include how to link datasets hosted external to the YOPP data portal to the catalogue. Options to connect datasets that are not served through discovery metadata interoperability interfaces are described.

DWD ICON data are now added to the catalogue of YOPPSiteMIP datasets. Direct reference to the searchable metadata is provided at https://yopp.met.no/metadata_search/?quid=7b96d8aa15d869c2a2c974b0099d3… and the data are directly available at https://thredds.met.no/thredds/catalog/alertness/YOPP_supersite/icon-dw….

The Norwegian Meteorological Institute has uploaded YOPPSiteMIP data for YOPP supersites Ny-Ålesund and Sodankylä that are within the geographical domain of the Arome-Arctic model. Data are searchable and also directly available at:

https://thredds.met.no/thredds/catalog/alertness/YOPP_supersite/AROME-A…

The HydroMeteorological research Center of Russia has made YOPPSiteMIP data from the SL-AV model available for YOPP supersites.

https://yopp.met.no/metadata_search/?quid=07afe109d494f4062371a197ff5d4…

Environment and Climate Change Canada (ECCC) has developed the Canadian Arctic Prediction System (CAPS). CAPS has been runned in operation at the Canadian Meteorological Service in experimental mode since February 2018. Prior to the 28th of June 2018 (included), CAPS was runned uncoupled, whereas since the 29th of June 2018 (included), CAPS was coupled with the Canadian Regional Ice and Ocean Prediction system (RIOPS).