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
Go to topicThank you for liking
You have already liked this page, you can only like it once!
With the initial images from each of the instruments aboard ESA’s EarthCARE satellite now in hand, it's time to reveal how these four advanced sensors work in synergy to measure how clouds and aerosols influence the heating and cooling of our atmosphere.
The animation, which features data from 18 September 2024, shows the multispectral imager mapping different types of cloud and first features a thunderstorm over Milan, Italy, and then low marine clouds over the Baltic Sea and high-altitude cirrus cloud over Sweden. The broadband radiometer registers the reflected solar radiation as measured at the top of the atmosphere, where red corresponds to high values and blue to low values. The measured thermal radiation emitted from Earth is not shown in the animation. The cloud profiling radar takes a full vertical profile of the bulk of the thundercloud as it is more sensitive to water droplets and precipitation, while the cirrus cloud made of ice particles does not give a strong signal. However, these are detected by the atmospheric lidar, which clearly captures ice particles suspended at the top of both clouds. Both instruments are needed to retrieve the full top to bottom cloud profile as the synergy slide shows, overlapping all areas. With this at hand, EarthCARE’s synergistic data products are enabled, such as the total water content in the atmosphere.
The overall heating effect of cirrus clouds, particularly in their upper layers, is evident where the clouds absorb both solar radiation as well as thermal radiation from the Earth’s surface. This warming effect is interrupted where the cloud thickens and larger ice particles form, blocking the thermal radiation being emitted from Earth’s surface. In these denser regions, the cloud top cools by emitting thermal radiation into space. Despite these localised cooling effects, cirrus clouds contribute to the overall warming of the atmosphere.
Read full story: EarthCARE synergy reveals the power of clouds and aerosols