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SUMMARY:Was Venus ever habitable? - Tereza Constantinou
DTSTART:20231025T121500Z
DTEND:20231025T124000Z
UID:TALK207676@talks.cam.ac.uk
CONTACT:107642
DESCRIPTION:Venus' geodynamic and climatic history is uncertain\, particul
 arly whether the surface ever hosted liquid water and habitable conditions
 . Large D/H ratios measured from Pioneer Venus could indicate the existenc
 e of a large water reservoir on Venus. However\, it is unclear whether thi
 s water ever existed in a liquid form on the surface\, allowing for habita
 ble conditions\, or if it solely existed as gas or clouds in the atmospher
 e. The presence of surface water on Venus is still unknown due to a large 
 global volcanic surfacing event 0.2-3 billion years ago that has obscured 
 much of its history. Venus may now be uninhabitable\, but in the lead-up t
 o its current hot and dry state\, two climatic paths have been proposed\, 
 the "dry Venus" scenario: slow magma ocean solidification\, early desiccat
 ion\, hellish environment & the "temperate Venus" scenario: habitable past
 \, with a lasting temperate climate\, shallow oceans and plate tectonics. 
 In this talk I will present how we constrain Venus' climatic past and whet
 her the planet had surface oceans\, with a direct observational test that 
 speaks to Venus' climate past.  
LOCATION:The Hoyle Lecture Theatre + Zoom 
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