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Optical observations of thunderstorms from the International Space Station: recent results and perspectives

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NPJ MICROGRAVITY
卷 9, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41526-023-00257-4

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The International Space Station is an ideal platform for observing thunderstorms and their electrification. In the coming years, meteorological satellites in geostationary orbit and Earth-observing satellite instruments in both geostationary and low-Earth orbit will provide even more advanced observations. These new observations can greatly contribute to our understanding of thunderstorms' effects on atmospheric dynamics and climate change.
The International Space Station (ISS) is in the lowest available orbit at similar to 400 km altitude, bringing instruments as close to the atmosphere as possible from the vantage point of space. The orbit inclination is 51.6 degrees, which brings the ISS over all the low- and mid-latitude regions of the Earth and at all local times. It is an ideal platform to observe deep convection and electrification of thunderstorms, taken advantage of by the Lightning Imaging Sensor (LIS) and the Atmosphere Space Interaction Monitor (ASIM) experiments. In the coming years, meteorological satellites in geostationary orbit (similar to 36,000 km altitude) will provide sophisticated cloud and lightning observations with almost complete coverage of the Earth's thunderstorm regions. In addition, Earth-observing satellite instruments in geostationary- and low-Earth orbit (LEO) will measure more atmospheric parameters at a higher resolution than we know today. The new infrastructure in space offers an opportunity to advance our understanding of the role of thunderstorms in atmospheric dynamics and climate change. Here, we discuss how observations from the ISS or other LEO platforms with instruments that view the atmosphere at slanted angles can complement the measurements from primarily nadir-oriented instruments of present and planned missions. We suggest that the slanted viewing geometry from LEO may resolve the altitude of electrical activity and the cloud structure where they occur, with implications for modelling thunderstorms' effects on the atmosphere's radiative properties and climate balance.

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