The first PAMIP data are now available through https://pcmdi.llnl.gov/CMIP6/ArchiveStatistics/esgf_data_holdings/. These data are important for PPP and YOPP. Further information is available in https://www.geosci-model-dev.net/12/1139/2019/.

CNRM, University de Toulouse, Météo-France, CNRS, Toulouse, France has provided YOPP Model Site Intercomparison data for the Arctic Supersites. These data are indexed in the catalogue and the results are available through https://yopp.met.no/metadata_search/?quid=3d5a7b4b0a927c64ef1d0f6d5759b… (push "search").

The Norwegian Meteorological Institute is extracting public data from WMO GTS and converting these to NetCDF/CF. This is being done for SYNOP, TEMP and SHIP data. Some of these data have been indexed in the catalogue with discovery metadata (SYNOP), but not all. Furthermore, work is in progress on the TEMP data to support high resolution profiles.

Several of the YOPP modelling teams have been working on extraction of data over YOPP supersites. Information from two models in the Arctic, ARPEGE and ECCC-CAPS are now available in NetCDF/CF through a THREDDS Data Server. Work is in progress to make these data searchable through the YOPP catalogue. The data is available at http://thredds.met.no/thredds/catalog/alertness/YOPP_supersite/catalog.html.

A working group has been identifying YOPP supersites where numerical simualtions can be compared with extensive observations. Background material is provided in the YOPP supersite Model Intercomparison project (YOPPSiteMIP) paper.

PANGAEA is hosting YOPP data. Information on these datasets are regularly harvested from the YOPP Data Portal and ingested. YOPP datasets hosted by PANGAEA are attached to the YOPP project which is available at https://www.pangaea.de/?f.project=YOPP. Several of the datasets have parent/child relationships. Maintenance of these parent/child relationships is attempted in the searchable YOPP catalog.

British Antarctic Survey (BAS) is collecting radiosonde data that were produced during YOPP Southern Hemisphere Special Observing Period (SOP). These data are stored on a FTP server by BAS which is available at ftp://ftp.bas.ac.uk/src/YOPP-SH/radiosondes/.

Following an upgrade of the front- and backend services of the catalogue, the catalogue search engine was restructured yesterday and reindexing of datasets initiated. During the evening of November 21 a hardware outage prevented completion of the reindexing process. Due to this, the catalogue is yet not properly populated. This work will continue once hardware issues have been fixed.

An interactive service that can be used to validate NetCDF/CF and ACDD files have been added to the Support section. This is available through https://yopp.met.no/dataset_validation/form.

This weekend the YOPP Data Portal backends were updated to take advantage of a number of improvements in the search interface. In this process,  synoptic weather station information extracted from WMO GTS have been added to the catalogue. These stations are normally presented as time series at stations. The search interface now allows plotting and transformation of these data on the fly. As this is a net centric service, beware that depending on the network traffic and the response time of the contributing data centres web services this may take some seconds.