Source: https://tendernation.io/opportunities/01a140a5-db3a-72da-b257-4e916ea7d910/germany-research-and-development-services-and-related-consultancy-services-c

closed DE open procedure Suitable for SMEs

# Research and development services and related consultancy services – C3S2\_620 Improved treatment of the stratosphere in C3S reanalyses

[European Centre for Medium Range Weather Forecasts (ECMWF)](https://tendernation.io/buyers/european-centre-for-medium-range-weather-forecasts-ecmwf)

Estimated value

€1,900,000

Published

21 Nov 2025

Deadline

Closed

21 Jan 2026

## Who can bid

- Buyer says suitable for SMEs

    The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid.
- Open procedure

    Anyone can submit a full tender; there is no shortlisting stage.

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## About this tender

ECMWF, as the Entrusted Entity for the Copernicus Climate Change Service (C3S), invites Tenders for development activities to assess and improve the treatment of the stratosphere in climate reanalyses. This will be achieved by completing developments in the ECMWF Integrated Forecasting System (IFS) and performing assimilation experiments with observations of upper atmospheric temperature and humidity. This work will assess the quality of ERA6 temperature and humidity in the upper atmosphere shortly after production and evaluate a method for correcting model biases in the stratosphere in early periods of future reanalyses using information from the data-rich modern era. To support the validation of these developments, high-quality in-situ observation data records shall be acquired. ECMWF intends to award a single Framework Agreement for a period of maximum 30 months, which shall be implemented via a single Service Contract expected to commence in Q2 2026.

## CPV classification

Research and development services and related consultancy services

Source

Tenders Electronic Daily (EU) · Notice 773690-2025

[View official notice](https://ted.europa.eu/en/notice/773690-2025)

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