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The lightning flash - the fireworks of nature

Inträffade 04 juni 2019 kl. 18:30
Publicerades 24 sep. 2019

Each second about 100 lightning flashes strike inside the Earth’s atmosphere. Out of this about 20 - 30 flashes strike the ground (ground flashes) and the rest takes place inside the cloud (cloud flashes).

During a lightning strike the air is heated to a temperature of about 200000 C and the energy dissipated globally by lightning flashes in the atmosphere is about 200 Terawatt hours each year. More recently, the crew of the Space Shuttle discovered lightning-like-discharges that strike from cloud tops to the upper atmosphere. These are called upper atmospheric lightning discharges. Some of these discharges had lengths reaching up to 100 km and diameters of about 10 km.



Vernon Cooray
Professor, Ångströmlaboratoriet, UU

Praktisk information

4 juni 2019 kl. 18:30