• Extended temporal coverage and scenario diversity
  The historical stream now spans from 1950 to the near present, and the projections stream has been extended to the year 2100 (previously 2065). The ensemble of global climate models has increased from three to six, and the number of Shared Socioeconomic Pathways (SSPs) from one to four, enhancing the robustness of long-term climate scenario analysis.

• Improved bias adjustment using GWA2
  Wind speed data are now bias-corrected using Global Wind Atlas version 2 (GWA2), replacing the COSMO-REA6 dataset used in PECDv4.1. This change improves alignment with local wind climatology and enhances the reliability of wind power simulations.

• Updated offshore bidding zones
  A revised shapefile for offshore bidding zones (PEOF) has been adopted, following requests by several TSOs to ENTSO-E. This update ensures consistency with evolving national boundaries used for operational and planning purposes.

• Enhanced energy conversion models
  Both the wind and solar photovoltaic (PV) models have been improved. The PV model now accounts for four PV technologies, while the wind model supports two different deployment scenarios for wind power plants. These enhancements lead to more realistic and flexible capacity factor simulations.

• New spatial aggregation level for cities
  A new CITY-level aggregation has been introduced for the 2 m temperature variable, allowing daily urban temperature data to be extracted for selected key cities across Europe. These are provided in CSV format.

• Monthly updates for historical data
  As requested by ENTSO-E, the historical stream will be kept up to date. In line with ECMWF's policy on data production, interim files are generated monthly for the current year. At the end of each year, the twelve monthly files are consolidated into a single annual file to ensure consistency with the rest of the database.

• Transition to yearly file format
  PECDv4.2 replaces the monthly file format of PECDv4.1 with a yearly file structure, simplifying data handling and enabling more efficient analysis of long-term trends.

For gridded data, the spatial resolution is the same as in PECDv4.1 (0.25°x0.25°).

For timeseries data, the aggregation levels are the same as for PECDv4.1 

Data are regionally aggregated to NUTS 0 (country level); NUTS 2 (subcountry level); PEON and PEOF (pan-European onshore and offshore zones, respectively); SZON and SZOF (onshore and offshore bidding zones, respectively).

For the TA variable, data are also provided at the CITY level. This is not the result of an aggregation procedure, but rather consists of time series of TA values extracted from the grid cells closest to the coordinates of selected cities. The list of cities is not user-customizable; it was provided by ENTSO-E following a specific request from MedTSOs.

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Workflows, Historical stream, Projection stream

Gridded data: 0.25° x 0.25°

Timeseries data: regionally aggregated to NUTS 0 (country level); NUTS 2 (subcountry level); PEON and PEOF (pan-European onshore and offshore zones, respectively); SZON and SZOF (onshore and offshore bidding zones, respectively)

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