The following questionnaire, intended to evaluate the user-friendliness of and identify potential improvements for the Sea Ice Portal, was prepared by REKLIM, Regional Climate Change and Humans research network, at the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany. Related data processing is carried out by the REKLIM project team at the Sea Ice Portal. Dr Renate Treffeisen [renate.treffeisen@awi.de] is responsible for data processing. Access to the data is restricted to the Sea Ice Portal project team. The evaluation data will not be deleted and will be used for continuous improvement of the Sea Ice Portal as well as scientific publications on the project. As the survey is conducted anonymously, questionnaire responses cannot be traced back to individuals. Therefore, individual data cannot be deleted retroactively. The anonymously submitted data will be permanently stored for statistical purposes. Participants under 14 years of age require the knowledge or consent of their legal guardians to participate in the evaluation. By participating in this survey, you agree to the data processing described above.