This research campaign was carried out on vessel / platform: from land / without research vessel. Information on the campaign: The objectives of this project were to identify the key processes in the nitrogen cycle in the estuarine and coastal waters using stable N isotopes and to quantify these processes. As parameter the nutrient loads and stable isotopes values of nitrogen were measured.. The campaign was carried out in the context of the following project(s): Helmholtz-YIG. The data of this campaign is partially published at https://doi.org/10.1594/PANGAEA.865348