Terms and Conditions – ESoWC 2022


The ECMWF Summer of Weather Code Programme (“ESOWC” or “the Programme”) is organized by the European Centre for Medium Range Weather Forecast (ECMWF), an inter-governmental organisation acting through its duty station at Robert-Schumann-Platz 3, 53175 Bonn, Germany and regulated by these terms (“the Agreement”). 


The aim of the ESOWC is to develop innovative software and technologies that address the challenges of handling large amount of data and transform it into information. For that purpose, ECMWF will publicly announce a number of challenges under three different streams. The challenges can be responded to by qualified candidates, typically on the basis of written reports describing an open-software-based solution to the challenge (“Proposals”).  

2. From among all Proposals submitted to each stream ECMWF has the right, but no obligation, to select ten or less Proposals. If a Proposal is selected, its author will create the software or technology described in the Proposal. If the challenge for which the Proposal included the requirement of cloud processing services, its author will be eligible to apply for cloud credits either from the European Weather Cloud implemented by ECMWF and EUMETSAT or the European Union’s Copernicus DIAS reference service WEkEO. Upon acceptance of the complete software or technology, along with the necessary documentations (jointly referred to as “Deliverables”) by ECMWF, ECMWF agrees to pay a one-off payment of 5,000 GBP (“Stipend”) for each of the ten Deliverables. 


1. Participation in the Programme is free of charge. The Programme is open to natural persons, either applying alone or jointly with others, filling in the required information and agreeing to these terms. Each person must (i) at the time of application be minimum 18 years old or have the age required by applicable law in their country of residence to validly enter this Programme, whichever is higher, (ii) and hold a bank account in their country of tax residence, (iii) have access to all necessary hardware and software to submit a proposal and (iv) have sufficient software development experience (“Participants”). For ECMWF funded challenges, nationals of all countries are eligible to participate, however priority is given to nationals from ECMWF Member States. For Copernicus funded challenges, only nationals from European Union (EU) Member States and countries associated with EU’s Space Programme (currently Iceland and Norway) are eligible to participate. Participants can apply for more than one challenge. Participants proposing to work jointly with others must designate a representative, who will register on behalf of the team and provide name, surname, email address, country of residence and nationality of each team member. Stipends are payable per Deliverable, irrespective of the number of Participants behind it. 

2. All Participants will be asked to go to https://esowc.ecmwf.int (“the Programme Website”) and go to “Submit your application”. All Participants must accept these terms. There is no right to participate.


ESOWC is divided into four general phases:

1. Phase: Registration Phase

Date: Between 1st March 2022 (12:00 UTC) and 15th April 2022 (23:59 UTC). 

Object: Every person wishing to participate can register and submit their Proposal online at the Programme Website.  

Proposals received before 1st March or after 15th April 2022 will not be considered, answered or returned. All Participants must provide the following information: last name, first name, country of residence during ESoWC’s coding phase, nationality and email. They also must adequately demonstrate previous software development experience (e.g. through professional profiles such as GitHub or LinkedIn). 


Each Participant warrants that the information entered during her/his application to ESOWC is complete and accurate. Any false, incorrect or incomplete information may result in the application being rejected. The Participants are responsible to notify ECMWF of any changes to their personal information. ECMWF reserves the right to reject applications at any time. 


Prior to obtaining access to ECMWF IT systems, each Participant must also complete, sign, and return a form acknowledging ECMWF Policies governing his/her work. A scanned copy of the original or an electronically signed document is sufficient. 


Each Participant is invited to read about the challenges proposed by ECMWF on GitHub.

2. Phase: Projects Review

Date: 16th April 2022 (12:00 UTC) to 28th April 2022 (12:00 UTC) 

Purpose: ECMWF to review the submitted Proposals and select up to ten which will be part of the ESOWC Programme for 2022. The selected Proposals will be announced on the Programme Website by 29th April 2022 at 12:00 UTC.  

3. Phase: Coding Period

Date: From 2nd May 2022 at 12:00 UTC until 31st August 2022 at 12:00 UTC 

Purpose: to develop innovative open-source software, which addresses the challenges of handling large amount of data and transform it into information. 

4. Phase: Presentation of the Project

Date: Wednesday, 28th September 2022 

Place: Hybrid with an in-person event in Bonn or online only, depending on the Covid-19 situation. This will be confirmed on the project website at a later stage. 

Purpose: After the Coding Period, the projects will be presented at an appropriate workshop. 

ARTICLE 5 - Intellectual Property Rights

1. Each Participant warrants that their Proposals have been created by them and are free from rights of third parties. 

2. All Participants grant to ECMWF a free, non-exclusive, worldwide, non-transferable, license for each Proposal for the purpose of selecting winning Proposals. ECMWF shall retain no rights in proposals which were not selected. For Copernicus funded challenges, this license is granted to the EU as well.  

3. Each Participant shall own Deliverables that have been created by them and all intellectual property rights contained in such Deliverables. All Participants grant to ECMWF a free, non-exclusive, irrevocable, worldwide, transferable, sub-licensable and perpetual license for his/her Deliverables. For Copernicus funded challenges, this license is granted to the EU. The Participant warrants to be entitled to grant such rights. 

4. For the Participant’s pre-existing intellectual property rights or rights that the Participant may have developed or acquired independently of the performance of his/her obligations, the Participant grants ECMWF a free, non-exclusive, irrevocable, worldwide, transferable, sub-licensable and perpetual license to use all such intellectual property rights as are necessary for the use of the Deliverables, including for their maintenance, modification, and replacement by or on behalf of ECMWF. For Copernicus funded challenges, this license is granted to the EU as well. The Participant warrants to be entitled to grant such licenses.


After the Coding Period, ECMWF will undertake acceptance testing of the Deliverables to check them against the Proposals and to assess their overall functionality. Upon acceptance, for ECMWF funded challenges, Trust-IT Services Ltd will, on behalf of ECMWF, pay the Stipend as a one-off money transfer into a personal account as communicated by the selected Participants. For Copernicus funded challenges, ECMWF will pay the Stipend as a one-off money transfer into a personal account as communicated by the selected Participants. All money transfer shall be executed until no later than 15 December 2022. Any fees charged by the Participant’s bank are borne by the Participant. If no proper bank account is communicated, Trust-IT Services or ECMWF will hold the Stipend as a fiduciary until the account is properly named. If the amount cannot be paid within twelve months, it is considered as forfeited. No interest will be paid. 


There is no right to participate in the Programme or to receive a Stipend payment short of delivery and acceptance of the Deliverables. 


1. There is no right to participate in the Programme or to receive a Stipend payment short of delivery and acceptance of the Deliverables.  

2. ECMWF can terminate, shorten, extend, modify or otherwise change the Programme at any time prior to the selection of winning Proposals without cause and with immediate effect. All Participants have to be sent appropriate notifications for such changes to become effective. In case of termination of the Programme, all Agreements are deemed terminated with immediate effect. ECMWF does not owe any payment to the Participants and will return and/or delete all received proposals.  

3. The Participant can terminate this Agreement at any time prior to submission of his/her Proposal with immediate effect. Such Participants will not be entitled to any portion of the Stipend. 

4. ECMWF can terminate this Agreement at any time with immediate effect if a Participant violates any of the Agreement’s terms. In particular, ECMWF can terminate this Agreement if it has reasonable grounds to believe that the Participant has submitted any other but his/her own work as a Proposal or has, in any way, shape or form, violated applicable provisions governing Intellectual Property Regulations or criminal provisions in his/her country of origin or where ECMWF is located in conjunction with the submission of his/her Proposal. ECMWF can also terminate the Agreement if the Deliverables do not meet the criteria outlined in the Proposal. In case of a termination, ECMWF does not owe any portion of the Stipend.


The ESOWC Privacy Statement applies to all personal data provided by the Participants in order to register and submit their Proposals. 


Until one or more Proposals have been selected, all Proposals and all information related thereto are to be treated confidentially among the parties, unless ECMWF agrees otherwise in writing. After selection, Proposals not selected are relieved of such requirements.  


1. The Programme Website or any of its content may be unavailable from time to time for scheduled maintenance or due to unforeseen circumstances. 

2. Other than in cases of intentional or grossly negligent breaches of duty by its staff or representatives or claims resting on an injury to life, body or health, ECMWF shall not be responsible or liable to any Participant for any loss or damage of any sort incurred in connection with the Programme.  

3. ECMWF shall not be responsible or liable for the accuracy, usefulness or availability of any content of the Programme Website. Any content made available for download or use through or within the Programme Website is supplied "as is" without further warranties of any kind, either express or implied, including, but not limited to, the quality, performance, merchantability or fitness for a particular use or purpose. Subject to the aforesaid, ECMWF shall not be liable for any damages, including but not limited to direct, indirect, special, incidental, punitive, exemplary or consequential damages arising out of the use or the inability to use content. 

4. ECMWF shall not be liable and accept no representation or responsibility for the functionality or contents of external websites, services or software products hyperlinked from the Programme Website.  

5. ECMWF disclaims all warranties related to the provision of the Programme.


Participants acknowledge and agree that ECMWF may report on ESOWC to the general public and name selected Participants in any such communication.  


For the challenges funded by Copernicus, the European Commission, Copernicus and ECMWF shall be recognized in communications by the participants.  


1. Nothing in or relating to this Agreement shall be deemed a waiver of any of the privileges and immunities conferred upon ECMWF by virtue of its Convention and Protocol on the Privileges and Immunities.  

2. Any dispute between ECMWF and interested parties arising out of, or relating to, the Programme shall be resolved amicably by negotiation. If the dispute cannot be so settled, the parties agree to first enter into mediation in good faith to settle such a dispute and will do so in accordance with the Centre for Effective Dispute Resolution (CEDR) Model Mediation Procedure. Unless otherwise agreed between the parties within fourteen (14) days of notice of the dispute, the mediator will be nominated by CEDR. To initiate the mediation a party must give notice in writing to the other party to the dispute, referring the dispute to mediation. A copy of the referral should be sent to CEDR. Unless otherwise agreed, the mediation will start not later than twenty-eight (28) days after the date of the notice referred to in this Article.  

3. If the dispute cannot be settled in accordance with Article 12.2, it shall be finally settled under the Rules of Arbitration of the International Chamber of Commerce by three arbitrators appointed in accordance with the said rules; sitting in London, England. The proceedings shall be in the English language. The right of appeal by either party to any national courts is hereby agreed to be excluded. 

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