C3S2_620 Improved treatment of the stratosphere in C3S reanalyses

Published

12 January 2026

Submission deadline

4 February 2026

Estimated value

€1,900,000

Procedure

open

Lots

1

Notice number

00018649-2026

Reference

749137e1-212c-4d7e-b4f3-50449a0b8d2d

Official source

Official source

CPV codes

• 73000000Servicios de investigación y desarrollo y servicios de consultoría conexos

Description

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.

Frequently asked questions

What is the deadline to bid for this tender?

The submission deadline is 4 February 2026. Check the official source, as dates can be modified.

What is the estimated value of this tender?

The estimated value published by the buyer is €1,900,000.

Who is the buyer of this tender?

The contracting authority is European Centre for Medium Range Weather Forecasts (ECMWF) (European Union).