Analysis tools and models High-quality scientific software is essential for modern research. Developing software that is usable, maintainable, and well documented is an increasingly important part of modern science and is particularly critical as part of large collaborative projects. Research software can no longer be tailored to each individual researcher, but must be usable by the wider community, both the scientific community outside and the society that ultimately finances the research. Most of our research is publicly available. Do you want access to products, data or more information about our research? Contact the relevant research group for more information. Processing tools for satellite dataAt the Nansen Center, processing tools have been developed for earth observation data from various satellite sensors, data from measurements on the surface or in the sea, and data from our models. Software packages for climate dataObtaining and using historical climate data from large datasets can be a time-consuming and complicated process. We have contributed to the development of a solution that makes it easier to retrieve data from the global climate data sets, ERA5 and ERA5-Land, which are available through the Copernicus Climate Service. Sea-ice modelsSea ice data is of great importance for safe navigation in Arctic regions. At the Nansen Center, two tools have been developed which are used to predict changes in the sea ice in the near future for the North Atlantic and the Arctic; the data assimilation system TOPAZ and the sea-ice model neXtSIM. Software packages for underwater conditionsProduction of organic material through photosynthesis takes place both on land and in the sea. In the ocean, there are very small phytoplankton species that account for the majority of marine primary production, - that is, the formation of organic material from the photosynthesis of carbon dioxide (CO2) and water with the help of sunlight. Climate modelsGlobal climate models such as NorESM take into account all the elements our globe is made of, and which affect each other: atmosphere, ocean, ice, soil, and ecosystem. With such models, it is possible to look at what causes climate change and how the development could be. Software packages for data assimilationWe have two data assimilation software packages available for free use. Ocean modelsAt the Nansen Center, we are developing the data assimilation system TOPAZ which is based on the ocean model HYCOM, the ecosystem model ECOSMO, the sea-ice model CICE, and our own developed data assimilation method Ensamble Kalman Filter.