EUROPEAN ASTROBIOLOGY INSTITUTE 

EAI on-line seminar: CLIMATE BISTABILITY OF TERRESTRIAL EXOPLANETS 

Julie Noivaková, Charles University Prague; Czech Republic

20 October 2020, 16:00 CEST (14:00 UTC)


From medieval Japanese folk tales to modern science fiction, people have always imagined whether there could be life outside of the Earth. But only recent decades brought us the means to "go where no one has gone before" and test it. How has older and contemporary fiction imagined life on Venus, Mars, Europa or in other star systems entirely, and what can current science say about that?

Author, biologist and educator Julie Nekola Nováková will lead us on this journey through space and time and show the way science fiction can help us understand and communicate science, such as in the e-book anthology Strangest of All, edited for the European Astrobiology Institute.


To join follow the following link:

https://www.gotomeet.me/EAI_online

EAI on-line seminar: CLIMATE BISTABILITY OF TERRESTRIAL EXOPLANETS 

Antonello Provenzale, CNR, Italy

22 September 16:00 CEST (14:00 UTC)


Planetary climates are complex systems that include a multitude of stabilizing (negative) and destabilizing (positive) feedback loops. One of them, the ice-albedo feedback, is thought to be responsible for the existence of multiple stable states of the Earth’s climate, with the alternation between ice-covered conditions (the most extreme being the so-called Snowball) and warm states. Here, we explore the possible presence of bistability in the climate of Earth-like planets, using a simple one-dimensional climate model called ESTM. During the talk, we will consider the role of ice-albedo feedback for a wide range of orbital and planetary parameters such as distance from the star, ellipticity, obliquity and atmospheric pressure. Other possible mechanisms for bistability will also be mentioned, such as the vegetation-albedo and the vegetation-moisture feedbacks. Implications on planetary habitability will finally be discussed. The recording of the seminar is available at Youtube here.


This will be the first seminar in a series of EAI on-line seminars. To join follow the following link:

https://www.gotomeet.me/europeanastrobiologyinstitute/eai-webtalk1