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   SK53 (sk53@en.osm.town)'s status on Sunday, 26-Nov-2023 07:58:00 JST SK53

   Antarctica for day 2️⃣ 5️⃣ of #30DayMapChallenge : a fanciful conjecture based on NISDC bedrock data. Subsidiary title should read "nor isostatic rebound nor sea level rise".

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     Brendan Jones (brendanjones@fosstodon.org)'s status on Sunday, 26-Nov-2023 07:57:53 JST Brendan Jones

     in reply to

     • legraLeGra

     @SK53 @atthenius Is it without ice really such an archipelago at current sea levels? I had always assumed it was a bit more … solid.

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     Brendan Jones (brendanjones@fosstodon.org)'s status on Sunday, 26-Nov-2023 21:19:37 JST Brendan Jones

     in reply to

     • legraLeGra

     @atthenius @SK53 very cool (the concepts, not the sea level rise), thanks for the explanation.

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     legraLeGra (atthenius@fediscience.org)'s status on Sunday, 26-Nov-2023 21:19:38 JST legraLeGra

     in reply to

     • Brendan Jones

     @Brendanjones @SK53

     The grounding line in many spots in Antarctica is below sea level: scary :-/

     But, given enough time (millennia), the land would ‘rise’ w/o the load of ice on top of it (isostatic rebound*)… but, w/o that ice-load, seas would be 50’s meters-ish higher.

     Isostatic rebound: think about it like continents floating on a sea of mantle (so they must have keels)… and ice sheets are like huge foam blocks on top, pushing the whole boat below ‘surface’. That’ll rebound in time.