The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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As atmospheric carbon dioxide rises, Earth’s oceans are absorbing more carbon, changing the chemistry of ocean water. Observations from satellites can be used to measure parameters that indicate changing ocean water, such as temperature, salinity and chlorophyll content. Satellite and in-situ surface observations are combined using a machine learning technique to generate global monthly maps that characterise the changing chemistry of the ocean. Ocean acidification is shown by the steady fall in seawater pH values over the last 30 years.
Read full story: Satellites highlight a 30-year rise in ocean acidification