The decision support system Nest was initially developed within the MISTRA-funded MARE research program, which was completed in 2007. Nest was then successfully used for the development of the Eutrophication segment of the HELCOM Baltic Sea Action Plan, where nutrient load reductions needed to reach a healthy Baltic Sea were calculated, as were the allocations between countries. Nest is also used in many research programs. The maintenance and support of Nest has continued within the Baltic Nest Institute at Stockholm University Baltic Sea Centre. Documentation:

Fredrik Wulff, Alexander Sokolov and Oleg Savchuk. Nest – a decision support system for management of the Baltic Sea. A user manual. Baltic Nest Institute, Stockholm University Baltic Sea Centre, Technical Report No. 10. 2013. ISBN: 978-91-86655-09-9


2022-06-19: New version





2021-07-01: provides online access to the EMEP MSC-W modelled air concentrations and depositions provided by the Norwegian Meteorological institute, see

2021-05-02: SANBALT: added two load scenarios based on PLC-6 (2008-2012) and PLC-7 (2013-2017). Nest software should be reinstalled

2021-04-18: Baltsem model is updated to version 9.4 and Nest software should be reinstalled