{"id":5346,"date":"2021-11-02T12:19:18","date_gmt":"2021-11-02T20:19:18","guid":{"rendered":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/?p=5346"},"modified":"2021-11-02T12:19:20","modified_gmt":"2021-11-02T20:19:20","slug":"planetary-self-regulation-and-the-role-of-interior-processes-for-habitability","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/2021\/11\/02\/planetary-self-regulation-and-the-role-of-interior-processes-for-habitability\/","title":{"rendered":"&#8220;Planetary Self-Regulation and The Role of Interior Processes for Habitability&#8221;"},"content":{"rendered":"\n<p><a href=\"https:\/\/washington.zoom.us\/j\/91879649766?pwd=czNKVy9oYkcvaFMvM2JxQ1hhQ2RsQT09\">Zoom Link<\/a> for Colloquium 11\/16\/2021 3:00pm PST.<\/p>\n\n\n\n<p>Please email <a href=\"mailto:astrobio@uw.edu\">astrobio@uw.edu<\/a> for zoom presentation password<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2>Presented By <a href=\"https:\/\/profiles.rice.edu\/staff\/johnny-d-seales\">Johnny Seales<\/a>, Rice University<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>Planetary habitability depends on two energy sources: solar and interior. How a planet taps its internal energy determines how it cools, which influences planetary volcanism. Volcanic and magmatic activity connects a planet&#8217;s interior to its surface environment. One would suspect that a planet with decaying heat sources would experience a decay in magmatic activity over its lifetime until it inevitably ceased. However, Earth data suggest that Earth&#8217;s magmatic potential leveled off over the most recent few billion years. Using data-constrained models, I will argue that this leveling off resulted from the Earth locking into a self-regulated mode of planetary evolution. The combined effect of the deep-water cycling and planetary cooling on mantle viscosity produced this self-regulating behavior. However, not all planets will experience self-regulating behavior. For example, data-constrained models for Mars suggest that it did not. Different magmatic histories can play a role in determining the onset of planetary scale habitability. To explore this potential, I will extend the modeling of magmatic evolution by coupling it to simple climate models. I will show that for a population of Earth-like planets, a planet could have entered the habitable zone over a window spanning billions of years. The extent of this window varies depending on the planet&#8217;s distance from its host star. Given that Earth provides our most data rich planet, this suggests that the binary <em>yes<\/em> or <em>no<\/em> of habitability may lead us astray. Approaching habitability from a probabilistic perspective results in more nuanced expectations in the search for life. The more nuanced view remains a testable one with forthcoming data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zoom Link for Colloquium 11\/16\/2021 3:00pm PST. Please email astrobio@uw.edu for zoom presentation password Presented By Johnny Seales, Rice University&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[40,13,12],"tags":[120],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/5346"}],"collection":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/comments?post=5346"}],"version-history":[{"count":2,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/5346\/revisions"}],"predecessor-version":[{"id":5411,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/5346\/revisions\/5411"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/media?parent=5346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/categories?post=5346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/tags?post=5346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}