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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221206T120000
DTEND;TZID=America/Chicago:20221206T130000
DTSTAMP:20260423T123138
CREATED:20220916T230945Z
LAST-MODIFIED:20221202T193916Z
UID:2720-1670328000-1670331600@cleverplanets.org
SUMMARY:Seminar - Prof. Jon Wade
DESCRIPTION:Speaker: Prof. Jon Wade\, Department of Earth Sciences\, University of Oxford \nTitle: The irony of planetary habitability \nAbstract: Planetary habitability – how conducive a planet is to both support and initiate life – has often been interpreted as whether a planet can support liquid water on its surface\, and hence its distance from the parent star.  However\, we show that the abundance of iron in the planet’s rocky portion\, and its bioavailability through geological time\, is crucial to planetary habitability. Synthesised at the end of a star’s life\, most of our planet’s iron resides in its metallic core\, which in turn generates the magnetic field which protects surface life from harmful solar radiation. Importantly\, iron is the only major elemental component of rocks that undergoes valence changes on planetary surfaces\, a fact extensively exploited by life.  The quantity of iron available to life therefore places a significant constraint on potential habitability. This is determined in the very earliest phases of planetary building\, by the conditions under which a planet’s metallic core segregates from its rocky silicate host.  The subsequent rise of atmospheric oxygen over 2 billion years ago –  the first great ‘pollution’ event – resulted in significant reduction in oceanic iron\, placing severe stress on nascent life.  However\, this catastrophic loss of iron from the ancient seas provided the impetus for life to develop a variety of coping strategies\, including multicellularity and more aggressive mechanisms of iron acquisition.  We suggest that the evolution of complex life is intrinsically linked to changes in iron bioavailability and\, given the cosmochemical abundance of iron\, any complex life in the Universe is likely to be ‘red in tooth and claw’. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-prof-jon-wade/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221129T120000
DTEND;TZID=America/Chicago:20221129T130000
DTSTAMP:20260423T123138
CREATED:20220916T230806Z
LAST-MODIFIED:20221128T195329Z
UID:2715-1669723200-1669726800@cleverplanets.org
SUMMARY:Seminar - Claire Guimond
DESCRIPTION:Speaker: Claire Guimond\, Department of Earth Sciences\, Cambridge University \nTitle: Marble planet propensity: Insights from fundamental geophysics \nAbstract: Undetectable differences in how water is distributed on rocky planets will make or break whether they could support dry land\, with big consequences for long-term climate stability and the chemical origin of life. Our sample of one marbled world reveals little about the cosmic probability of this planetary form. Indeed\, Earth’s land/ocean fraction reflects complex\, indeterministic systems tied to its particular tectonic regime. Nevertheless\, we can identify more intrinsic processes which promote land or oceans on any rocky planet\, and which clue us to their propensity to host both. On one hand\, topography increases land area by hollowing out ocean basins\, a container for surface water. Geophysical scalings of RMS elevation with planet mass thus tell us the minimum ocean volume that would inundate a planet. On the other hand\, silicate mantles will also be a large reservoir for water (i.e.\, as structurally-bound hydrogen in minerals)\, with a thermodynamically-limited total capacity predictable from planet mass and bulk composition. All else equal\, planets with low capacity for interior water storage could more likely end up covered by deep oceans\, if this water cannot be contained elsewhere. Finally\, volcanic outgassing links these interior and surface water reservoirs\, but as I discuss\, determining its actual fluxes is difficult. Overall\, the results I show in this talk illustrate how we can leverage geophysical models to understand aspects of rocky worlds not amenable to observation. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-claire-guimond/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221115T120000
DTEND;TZID=America/Chicago:20221115T130000
DTSTAMP:20260423T123138
CREATED:20220916T230507Z
LAST-MODIFIED:20221110T152916Z
UID:2714-1668513600-1668517200@cleverplanets.org
SUMMARY:Seminar - Dr. Yoshinori Miyazaki
DESCRIPTION:Speaker: Dr. Yoshinori Miyazaki\, Caltech Center for Comparative Planetary Evolution\, California Institute of Technology \nTitle: Volatile degassing from the planetary interior and its implication for habitability \nAbstract: A large amount of volatiles could be stored in the planetary interior\, and volatile partitioning between the surface and interior plays a crucial role in characterizing planetary habitability. In this talk\, I will consider the geodynamics and mantle degassing during the early stage of planetary evolution\, from a magma ocean to the subsequent subsolidus convection stage\, to understand how the surface volatile budget is determined on terrestrial planets. We find that\, under stagnant-lid convection\, a planet is most likely to develop a Venus-like thick CO2 atmosphere\, with most of its water inventory retained in the mantle. An atmosphere with a strong greenhouse effect could preclude the formation of water oceans\, and the same is expected to be true for many rocky planets larger than Earth. For terrestrial planets to develop a moderate climate\, efficient carbon sequestration is crucial\, which requires the operation of plate tectonics. In particular\, plate velocity should have been very fast on the early Earth because an increasing number of observations suggest that Earth has attained a clement surface environment relatively early in its history (~4 Ga). I will show that mantle differentiation during magma ocean could be the key to rapid plate motion and thus the early emergence of a habitable environment. In addition\, a differentiated mantle could also promote a reaction between olivine and ocean water\, creating conditions similar to the Lost City hydrothermal field. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-dr-yoshinori-miyazaki/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221101T120000
DTEND;TZID=America/Chicago:20221101T130000
DTSTAMP:20260423T123138
CREATED:20220916T230351Z
LAST-MODIFIED:20221027T145054Z
UID:2713-1667304000-1667307600@cleverplanets.org
SUMMARY:Seminar - Prof. Emily Rauscher
DESCRIPTION:Speaker: Prof. Emily Rauscher\, Michigan Institute for Research in Astrophysics\, University of Michigan \nTitle: Pushing the Boundaries of Exoplanet Atmospheric Characterization \nAbstract:  It has been two decades since the first exoplanet atmosphere was detected and in the intervening years multiple methods have been developed to measure exoplanet atmospheric properties. Many of these techniques are complementary\, constraining different physical properties or regions of the planet’s atmosphere\, and in combination they can give us access to increasingly detailed atmospheric information. In this talk I will focus on two cutting-edge methods for atmospheric characterization: spectral eclipse mapping (from space-based instruments such as JWST) and high-resolution cross-correlation spectroscopy (from ground-based instruments\, including future Extremely Large Telescopes). I will explain each technique and the insights they give into atmospheric physics. I will discuss the current state of atmospheric characterization and its future trajectory. While there is certainly a limit to how well we will ever be able to measure exoplanet atmospheres\, we do not know where that limit is yet and are working to push it as far as we can. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-prof-emily-rauscher/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221018T120000
DTEND;TZID=America/Chicago:20221018T130000
DTSTAMP:20260423T123138
CREATED:20220916T225549Z
LAST-MODIFIED:20221013T201043Z
UID:2709-1666094400-1666098000@cleverplanets.org
SUMMARY:Seminar - Prof. Drew Syverson
DESCRIPTION:Speaker: Prof. Drew Syverson\, University of North Carolina at Charlotte \nTitle: Exploring the chemical and physical controls on the bioavailability of nutrients delivered to seawater from seafloor hydrothermal environments \nAbstract: Nearly 75% of Earth’s modern tectonic boundaries are located along mid-ocean ridge (MOR) spreading systems\, which are host to unique hydrothermal environments that sustain extremophile life while delivering critical nutrients to the marine biosphere at and below the seafloor. These hydrothermal environments on Earth may provide potential insight on geochemical processes that control the habitability of early Earth and of water-rich exoplanets. Yet\, our understanding of the physical and chemical controls influencing oceanic crust alteration\, which determine whether nutrients and bio-essential metals are delivered to the marine biosphere from this source\, are not completely understood. In this talk\, I will present geochemical modeling and experimental results that: 1) Explore how differences in subseafloor physicochemical conditions along Earth’s modern MOR system influences the mobilization and fate of metals and sulfur endowed in super-heated fluids\, and 2) Present results on how changes in atmospheric-oceanic oxygenation conditions will control the marine weathering P-cycle and the bioavailability of P derived from the weathering of oceanic crust. Overall\, these results suggest that secular changes in mantle heat flux and atmospheric-oceanic oxygenation conditions will have a large influence on nutrient/metal delivery to seawater and bioavailability on early Earth and on potentially water-rich exoplanets. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-prof-drew-syverson/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221004T120000
DTEND;TZID=America/Chicago:20221004T130000
DTSTAMP:20260423T123138
CREATED:20220916T225239Z
LAST-MODIFIED:20220930T190952Z
UID:2708-1664884800-1664888400@cleverplanets.org
SUMMARY:Seminar - Prof. Joshua Krissansen-Totton
DESCRIPTION:Speaker: Prof. Joshua Krissansen-Totton\, Earth and Space Sciences\, University of Washington \nTitle: Developing fully coupled models of terrestrial planet evolution to assess habitability and enable exoplanet life detection \nAbstract: Rocky planet evolution is shaped by complex geophysical\, geochemical\, and astrophysical processes. Interpreting current and future observations of terrestrial exoplanets will require an improved understanding of how these competing influences interact on long timescales. In particular\, the interpretation of potential biosignature gases is contingent upon understanding the probable geochemical evolution of lifeless worlds. Here\, I will present a generalized model of rocky planet evolution that connects early magma ocean evolution to subsequent\, temperate geochemical cycling. The thermal evolution of the interior\, tectonic recycling of volatiles\, surface climate\, and atmospheric escape are explicitly coupled throughout this evolution. The model can reproduce the atmospheric evolution of a lifeless Earth. Moreover\, the model also sheds light on the atmospheric evolution of Venus and Venus-like exoplanets; it can successfully recover modern Venus’s atmosphere composition and thermal state. We find there is a clear dichotomy in the evolutionary scenarios that recover modern Venus conditions\, one in which Venus was never habitable and perpetually in runaway greenhouse since formation\, and another where Venus experienced ~1-2 Gyr of surface habitability. James Webb Space Telescope observations of terrestrial exoplanets such as Trappist-1 b-h\, GJ 1132 b\, and LP 890-9 b-c will provide valuable opportunities to test and improve such generalized models. Preliminary predictions for these characterizable exoplanets will be presented. I will argue that an understanding of terrestrial planets—both within the solar system and beyond—as a unified class of objects will be necessary to enable exoplanet life detection. \nZoom Meeting Details:  \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:https://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n Link provided in the registration confirmation emailPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-prof-joshua-krissansen-totton/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220927T120000
DTEND;TZID=America/Chicago:20220927T130000
DTSTAMP:20260423T123138
CREATED:20220916T224933Z
LAST-MODIFIED:20220930T191059Z
UID:2706-1664280000-1664283600@cleverplanets.org
SUMMARY:Seminar - Dr. Margaret Landis
DESCRIPTION:Speaker: Dr. Margaret Landis\, Laboratory for Atmospheric and Space Physics\, University of Colorado Boulder \nTitle: The Past\, Present\, and Future of Lunar Polar Volatiles \nAbstract:  Planetary atmospheres potentially record a plethora of processes dating from accretion\, early bombardment\, and subsequent volcanic growth.  Whether for solar system planets or exoplanets\, the present-day composition of atmospheres may therefore be a rich archive of information on their geological history.  In the case of warm rocky planets\, those without liquid water at their surface\, recycling of the volatile elements constituting the atmosphere into the planet’s interior may be or inefficient or entirely inhibited.  In this case\, the atmospheres of warm rocky planets may constrain the interior composition and dynamics of the planet\, offering exciting potential to understand exoplanet interiors.   In this talk I present our recent results investigating the role of early massive impacts and volcanic degassing in building planetary atmospheres on rocky planets.  These results show the prospects and limitations of having to view planetary processes through the lens of their atmospheres.  I also discuss how Venus provides a key solar system analogue to warm rocky exoplanets\, the chemistry of which provides a reference case for predictions of atmospheric chemistry on Venus-like exoplanets. Zoom Meeting Details:  \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:https://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n Link provided in the registration confirmation emailPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-margaret-landis/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20220710
DTEND;VALUE=DATE:20220716
DTSTAMP:20260423T123138
CREATED:20210831T214847Z
LAST-MODIFIED:20210831T214847Z
UID:2336-1657411200-1657929599@cleverplanets.org
SUMMARY:Goldschmidt 2022
DESCRIPTION:
URL:https://cleverplanets.org/event/goldschmidt-2022/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20220515
DTEND;VALUE=DATE:20220521
DTSTAMP:20260423T123138
CREATED:20210115T193137Z
LAST-MODIFIED:20210115T193137Z
UID:2231-1652572800-1653091199@cleverplanets.org
SUMMARY:AbSciCon 2022
DESCRIPTION:
URL:https://cleverplanets.org/event/abscicon-2022/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220503T120000
DTEND;TZID=America/Chicago:20220503T130000
DTSTAMP:20260423T123138
CREATED:20220131T154235Z
LAST-MODIFIED:20220131T154235Z
UID:2562-1651579200-1651582800@cleverplanets.org
SUMMARY:Seminar - Kiran Chotalia
DESCRIPTION:Speaker: Kiran Chotalia\, Department of Geological Sciences\, University of Florida \nTitle: TBA \nAbstract: TBA \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-kiran-chotalia/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220419T120000
DTEND;TZID=America/Chicago:20220419T130000
DTSTAMP:20260423T123138
CREATED:20220131T154015Z
LAST-MODIFIED:20220414T154938Z
UID:2560-1650369600-1650373200@cleverplanets.org
SUMMARY:Seminar - Oliver Shorttle
DESCRIPTION:Speaker: Oliver Shorttle\, Department of Earth Sciences\, University of Cambridge \nTitle: Rocky planet atmospheres in the solar system and beyond \nAbstract:\n\nPlanetary atmospheres potentially record a plethora of processes dating from accretion\, early bombardment\, and subsequent volcanic growth.  Whether for solar system planets or exoplanets\, the present-day composition of atmospheres may therefore be a rich archive of information on their geological history.  In the case of warm rocky planets\, those without liquid water at their surface\, recycling of the volatile elements constituting the atmosphere into the planet’s interior may be or inefficient or entirely inhibited.  In this case\, the atmospheres of warm rocky planets may constrain the interior composition and dynamics of the planet\, offering exciting potential to understand exoplanet interiors. \nIn this talk I present our recent results investigating the role of early massive impacts and volcanic degassing in building planetary atmospheres on rocky planets.  These results show the prospects and limitations of having to view planetary processes through the lens of their atmospheres.  I also discuss how Venus provides a key solar system analogue to warm rocky exoplanets\, the chemistry of which provides a reference case for predictions of atmospheric chemistry on Venus-like exoplanets. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-oliver-shorttle/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220405T120000
DTEND;TZID=America/Chicago:20220405T130000
DTSTAMP:20260423T123138
CREATED:20220131T153820Z
LAST-MODIFIED:20220329T211733Z
UID:2558-1649160000-1649163600@cleverplanets.org
SUMMARY:Seminar - Christoph Burkhardt
DESCRIPTION:Speaker: Christoph Burkhardt\, Institut für Planetologie\, Westfälische Wilhelms-Universität Münster \nTitle: Mode of terrestrial planet formation and heritage of Earth’s volatiles: the story from isotope anomalies in meteorites \nAbstract: As tracers of planetary genetics\, isotope anomalies among planetary materials can provide key constraints for unraveling the Solar System’s dynamical evolution\, from the collapse of the molecular cloud to the formation of the terrestrial planets. In this lecture I will show how isotope anomalies among meteorites can be used to constrain the origin of Earth’s and Mars’ building blocks\, and whether pebble accretion or the classic oligarchic growth regime dominated the accretion of the terrestrial planets in the solar system. Further\, I will briefly discuss why it is relevant to know what the Earth is made of in the first place\, and end with some reflections on what isotope anomalies tell us – and what they don’t tell us – about the origin of Earth’s volatiles. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-christoph-burkhardt/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220322T120000
DTEND;TZID=America/Chicago:20220322T130000
DTSTAMP:20260423T123138
CREATED:20220131T153408Z
LAST-MODIFIED:20220317T182445Z
UID:2556-1647950400-1647954000@cleverplanets.org
SUMMARY:Seminar - Fabrice Gaillard
DESCRIPTION:Speaker: Fabrice Gaillard\, CNRS\, Orleans \nTitle: Atmophile elements in magma oceans \nAbstract: The process ruling the fate light volatile elements (life-forming elements\, C-H-O-S-N) during the magma ocean stage are important to define since numerous geochemical observations indicate that these were delivered early on planetry systems. Here\, combining experimental data and thermodynamic modelling\, I will expose two axis of our research on 1- the outgassing of the magma ocean atmosphere and 2- the sequestration of some of these elements in the core. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-fabrice-gaillard/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20220307
DTEND;VALUE=DATE:20220312
DTSTAMP:20260423T123138
CREATED:20210831T214637Z
LAST-MODIFIED:20210831T214637Z
UID:2334-1646611200-1647043199@cleverplanets.org
SUMMARY:LPSC 2022
DESCRIPTION:
URL:https://cleverplanets.org/event/lpsc-2022/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220222T120000
DTEND;TZID=America/Chicago:20220222T130000
DTSTAMP:20260423T123138
CREATED:20220131T153034Z
LAST-MODIFIED:20220216T185936Z
UID:2554-1645531200-1645534800@cleverplanets.org
SUMMARY:Seminar - Karin Öberg
DESCRIPTION:Speaker: Karin Öberg\, Department of Astronomy\, Harvard University \nTitle: The Chemistry of Planet Formation \nAbstract: Planets form in disks of dust and gas around young stars. The compositions of planets\, including the hospitality to life\, is fundamentally set by the composition of this dust and gas across the planet-forming disk. Recently we undertook a large ALMA project to map out the chemical content of five such disks at scales of 10s to 100s of au. We find a rich and highly unevenly distributed chemistry\, manifest in 100s of molecular sub-structures including rings and gaps. I will present some of these images as well as discuss how the distribution of organics in disks\, especially the prebiotically interesting nitriles\, and oxygen depletion should inform models of planet formation and mature planet compositions. This observational lens will be supplemented by recent theory and experiments that help make sense of our increasingly detailed astrochemical observations\, as well as some thoughts on how JWST will provide further constraints on the chemistry of planet formation. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-karin-oberg/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220208T120000
DTEND;TZID=America/Chicago:20220208T130000
DTSTAMP:20260423T123138
CREATED:20220131T152749Z
LAST-MODIFIED:20220201T200751Z
UID:2551-1644321600-1644325200@cleverplanets.org
SUMMARY:Seminar - Jacob Kegerreis
DESCRIPTION:Speaker: Jacob Kegerreis\, Institute for Computational Cosmology\, Durham University \nTitle: Atmospheric Erosion (and more!) by Giant Impacts onto Terrestrial Planets \nAbstract: Giant impacts dominate many planets’ late accretion and evolution\, including the Earth’s\, and can build\, erode\, or completely destroy a young atmosphere. In this talk\, I’ll present how we use 3D simulations to examine the erosion and other consequences of these collisions. For example\, in the Moon-forming impact\, only around 10% of the atmosphere would have been lost from the immediate effects of a ‘canonical’ impact\, up to about 60% in more violent scenarios. We find a scaling law to predict the loss of atmosphere from planetary collisions for any speed\, angle\, impactor mass\, target mass\, and body compositions\, in the regime of broadly terrestrial planets with relatively thin atmospheres. Different collision scenarios lead to extremely different behaviours and consequences for the planets. In spite of this complexity\, the fraction of lost atmosphere is fitted well by a power law\, and is independent of the total system mass for a constant impactor:total mass ratio. Slow impactors can also deliver a significant mass of atmosphere\, but always accompanied by larger proportions of their mantle and core. Lastly\, I’ll show how these high-resolution simulations reveal an alternate route for the origin of the Moon as an immediate post-impact satellite in orbit. \nZoom Meeting Details:  \n\n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-jacob-kegerreis/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20211213
DTEND;VALUE=DATE:20211218
DTSTAMP:20260423T123138
CREATED:20210831T214542Z
LAST-MODIFIED:20210831T214744Z
UID:2332-1639353600-1639785599@cleverplanets.org
SUMMARY:AGU 2021
DESCRIPTION:
URL:https://cleverplanets.org/event/agu-2021/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20211130T120000
DTEND;TZID=America/Chicago:20211130T130000
DTSTAMP:20260423T123138
CREATED:20210905T202121Z
LAST-MODIFIED:20211129T221817Z
UID:2348-1638273600-1638277200@cleverplanets.org
SUMMARY:Seminar: Megan Newcombe
DESCRIPTION:Speaker: MEGAN NEWCOMBE\, UNIVERSITY OF MARYLAND \nTitle: Efficient Degassing of Planetesimals During Melting and Differentiation: Water Delivery to Earth via Unmelted Material \nAbstract:The origin of water in the terrestrial planets is a topic of debate. Inner solar system bodies (e.g.\, Angrites\, 4-Vesta\, and the Moon) have D/H and volatile element ratios consistent with delivery of water by chondritic material\, but uncertainties persist regarding the timing of that delivery\, the ability of planetesimals to retain volatiles during accretion and differentiation\, and the role of alternative volatile sources such as nebular ingassing and comets. We have measured water in nominally anhydrous minerals in ungrouped achondrite and primitive achondrite meteorites with both carbonaceous (CC) and non-carbonaceous (NC) affinities. These analyses allow us to constrain the behavior of volatiles during the earliest stages of planetary accretion and melting. We expected that CC achondrite parent bodies would be more water-rich than their NC counterparts\, due to the fact that the CC bodies likely accreted in the ice-rich outer solar system. However\, our results show that nominally anhydrous minerals (olivine\, orthopyroxene\, clinopyroxene and plagioclase) in both CC and NC ungrouped achondrites contain ≤2 ppm H2O. Several processes could account for the dry nature of the CC and NC achondrites studied thus far\, including: (1) metamorphism of shallow unmelted chondritic material during internal heating\, driven by decay of short-lived radionuclides; (2) magma ocean degassing; and (3) melting and degassing of near-surface material during impact events. Since the undifferentiated meteorites among our samples are as dry as the samples that have undergone differentiation\, our results suggest that water is efficiently lost prior to differentiation\, during the early stages of melting and metamorphism\, such that water delivery to Earth likely occurred via unmelted material. \nZoom Meeting Details:  \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:https://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n Link provided in the registration confirmation emailPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-megan-newcombe/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20211116T120000
DTEND;TZID=America/Chicago:20211116T130000
DTSTAMP:20260423T123138
CREATED:20210905T153858Z
LAST-MODIFIED:20210905T153858Z
UID:2346-1637064000-1637067600@cleverplanets.org
SUMMARY:Seminar - Caroline Dorn
DESCRIPTION:Speaker: CAROLINE DORN\, ETH ZURICH \nTitle: Hidden water in magma oceans \nAbstract:\nOver the past years\, there has been huge progress in our understanding of the bulk properties of sub-Neptune exoplanets. Because hot and close-in planets are abundant in the exoplanet population\, phase transitions in the interiors of small\, dominantly rocky planets have come into sharper focus. Here\, we use coupled structural models of the interior and atmosphere of up to super-Earth-sized exoplanets to explore the effect of water partitioning into the interiors of rocky planets inside the runaway greenhouse transition and calculate the effect on the total radius of planets compared to recent models that ignore this effect. The two end-member assumptions lead to a deviation in total planet radius on the order of 5-10%\, which is within current accuracy limits for individual systems and will be statistically testable with next-generation transit surveys. In consequence\, the inferred water content for a given observed radius of a specific planet may be underestimated by up to two orders of magnitude if volatile partitioning between planetary sub-reservoirs is not accounted for. \n\n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-caroline-dorn/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20211102T120000
DTEND;TZID=America/Chicago:20211102T130000
DTSTAMP:20260423T123138
CREATED:20210905T153527Z
LAST-MODIFIED:20210905T153527Z
UID:2344-1635854400-1635858000@cleverplanets.org
SUMMARY:Seminar - Renyu Hu
DESCRIPTION:Speaker: RENYU HU\, JET PROPULSION LABORATORY (JPL) \nTitle: Characterizing atmospheric chemistry in temperate exoplanets \nAbstract:\nThe era of observationally characterizing temperate exoplanets and studying their atmospheric composition has begun. Hubble and JWST already have several candidate planets to study\, and TESS may find another handful of temperate planets suitable for follow-up atmospheric observations. These temperate worlds are however very different from Earth – orbiting around a much cooler star\, being substantially larger\, or having different kinds of atmospheres. To guide observations\, I couple atmospheric chemistry models with basic understandings of planetary climate and interior processes to determine the ranges of detectable atmospheric signatures and their implications. Recent progress will be discussed in this talk. I will show that on habitable-zone planets around late M dwarf stars like TRAPPIST-1\, a small abundance of CO2 (often required to create a liquid-water ocean surface) would lead to a large abundance of O2 and CO in photochemical equilibrium. Because of this “O2-CO runaway”\, habitable environments around late M stars likely entail an O2-rich atmosphere. I will also show that on larger and H-rich temperate planets (such as K2-18 b)\, photochemical processes based on CH4 and NH3 produce detectable abundances of HCN but little hydrocarbons in the observable part of the atmosphere. Lastly\, I will discuss how future direct imaging observations using a starshade will enable the studies of temperate planets and their atmospheres around nearby stars. \n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-renyu-hu/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20211019T120000
DTEND;TZID=America/Chicago:20211019T130000
DTSTAMP:20260423T123138
CREATED:20210905T202515Z
LAST-MODIFIED:20211012T145141Z
UID:2350-1634644800-1634648400@cleverplanets.org
SUMMARY:Seminar - Laurette Piani
DESCRIPTION:Speaker: LAURETTE PIANI\, CRPG Nancy \nTitle: Distribution of water in the inner Solar System and interest for the origin of water on Earth \nAbstract:Hydrogen is the most abundant element of the Solar System; nonetheless its distribution and evolution in the protoplanetary disk and planetary materials remain fairly unknown. As a striking example\, the origin of Earth’s hydrogen -and thus water- is one of the most puzzling issues. Chondrites are rocky fragments of asteroids that formed at different times and heliocentric distances in the protoplanetary disk. By studying hydrogen in chondrites from different classes and groups\, we can have a window on the water distribution at the time of the planet formation. In this talk\, I will present recent works on hydrogen in chondrites that allow us to discuss the origin of the hydrogen isotopic distribution in the Solar System and implications for the Earth’s water budget. \n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER\n\n 
URL:https://cleverplanets.org/event/seminar-laurette-piani/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20211005T120000
DTEND;TZID=America/Chicago:20211005T130000
DTSTAMP:20260423T123138
CREATED:20210916T184950Z
LAST-MODIFIED:20210928T044212Z
UID:2353-1633435200-1633438800@cleverplanets.org
SUMMARY:Seminar – Jennifer Bergner
DESCRIPTION:Speaker: JENNIFER BERGNER\, UNIVERSITY OF CHICAGO \nTitle: Volatile chemistry in planet-forming disks \nAbstract:The viability of prebiotic chemistry on a nascent planet is dependent on the inventory of volatiles incorporated during the planet’s formation\, particularly carriers of the elements CHNOPS. This raises the questions: how did Earth obtain its prebiotic precursors\, and how commonly do other planets inherit the ingredients for prebiotic chemistry?  By studying the volatile chemistry at play in the evolutionary progenitors of planetary systems (protostars and protoplanetary disks)\, we gain valuable insight into these questions.  In this talk I will share recent progress in characterizing the chemistry of volatile species in planet-forming disks using ALMA\, which reveals how the changing physical environment alters the chemistry over the disk lifetime.  Our complementary simulations and lab experiments of astrophysical ices also allow us to probe the chemistry of the ice phase\, which is currently unobservable but represents the dominant volatile reservoir in disks.  Taken together\, we are assembling a more complete picture of the chemical environment which regulates the formation\, composition\, and potential habitability of planetesimals and planets. \n\nZoom Meeting Details: \nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w \n\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/seminar-jennifer-bergner/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20210921T120000
DTEND;TZID=America/Chicago:20210921T130000
DTSTAMP:20260423T123138
CREATED:20210831T214033Z
LAST-MODIFIED:20210905T152928Z
UID:2330-1632225600-1632229200@cleverplanets.org
SUMMARY:Seminar - Anders Johansen
DESCRIPTION:Speaker: ANDERS JOHANSEN\, UNIVERSITY OF COPENHAGEN \nTitle: Formation of terrestrial planets by pebble accretion \nAbstract: \nThe formation of the terrestrial planets in the Solar System is normally considered to last several 10s of million years and to have proceeded by giant impacts within a population of Mars-sized protoplanets. Observations of protoplanetary discs around young stars reveal that such discs host several hundred Earth masses of mm-cm sized pebbles. This inspired the pebble accretion theory for planet formation where the cores of giant planets grow by rapid accretion of these pebbles. By extension\, pebble accretion should be an important process in terrestrial planet formation as well. I present a series of new papers where we show that Venus\, Earth and Mars likely formed within 3-5 Myr by rapid pebble accretion. Volatiles such as water\, nitrogen and carbon are delivered by small pebbles that are accreted at the earliest stages of planetary growth. Partition of these volatiles between core\, mantle and atmosphere combined with early atmospheric loss gives good matches to the modern atmospheres and water reservoirs of Venus\, Earth and Mars. Pebble accretion thus gives a quantitive prediction of volatile budgets and atmospheric compositions of terrestrial planets without invoking stochastic giant impacts as the delivery source.\n\n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/clever-planets-seminar-series-2/
CATEGORIES:Lecture/Webinar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20210907T120000
DTEND;TZID=America/Chicago:20210907T130000
DTSTAMP:20260423T123138
CREATED:20210831T213052Z
LAST-MODIFIED:20210905T152949Z
UID:2327-1631016000-1631019600@cleverplanets.org
SUMMARY:Seminar - Max Collinet
DESCRIPTION:Speaker: MAX COLLINET\, GERMAN AEROSPACE CENTER (DLR)\, BERLIN \nTitle: Achondrites as witnesses of early melting processes in planetesimals and planetary embryos: experimental constraints and new meteorite discoveries \nAbstract:\nAchondrite meteorites are highly variable in composition: some are ultramafic (primitive achondrites) while others are basaltic (e.g. eucrites and angrites)\, to trachy-andesitic (e.g. GRA 06128 and Erg Chech 002). Those different groups correspond to the mantle and crust of planetary building blocks\, respectively. They represent a unique opportunity to constrain the early melting processes that affected planetesimals and could have influenced the final composition of planets. \nI will describe two sets of low pressure (20-120 bars) melting experiments on chondritic compositions\, simulating batch and fractional melting (0-30 wt.% melting). They are the first experiments in which the alkali elements were retained successfully during melting at low pressure. By comparing the experimental results with the meteorite record\, I will argue that the melting processes\, and the efficiency of melt extraction\, varied greatly in achondrite parent bodies but that all planetesimals from the inner solar system (i.e. the non-carbonaceous reservoir) were initial rich in alkalis and other moderately volatile elements. The efficient extraction of silicate melts from the ureilite parent body suggest that highly volatile elements were also present during partial melting. \n\n\nZoom Meeting Details: \n\nRegister in advance for this webinar (registration is required for the first attendance only\, you will then be automatically registered for all the following seminars.:\nhttps://riceuniversity.zoom.us/webinar/register/WN_vECxt9E3S_K1QS8zejzl3w\n\n\nLink provided in the registration confirmation email\nPassword: CLEVER
URL:https://cleverplanets.org/event/clever-planets-seminar-series/
CATEGORIES:Lecture/Webinar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210704
DTEND;VALUE=DATE:20210710
DTSTAMP:20260423T123138
CREATED:20210115T192911Z
LAST-MODIFIED:20210115T192911Z
UID:2229-1625356800-1625875199@cleverplanets.org
SUMMARY:Goldschmidt 2021
DESCRIPTION:
URL:https://cleverplanets.org/event/goldschmidt-2021/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210315
DTEND;VALUE=DATE:20210320
DTSTAMP:20260423T123138
CREATED:20210115T192640Z
LAST-MODIFIED:20210115T192640Z
UID:2227-1615766400-1616198399@cleverplanets.org
SUMMARY:LPSC 2021
DESCRIPTION:
URL:https://cleverplanets.org/event/lpsc-2021/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210222
DTEND;VALUE=DATE:20210227
DTSTAMP:20260423T123138
CREATED:20210115T192438Z
LAST-MODIFIED:20210115T192438Z
UID:2225-1613952000-1614383999@cleverplanets.org
SUMMARY:Habitable Worlds 2021 Workshop
DESCRIPTION:
URL:https://cleverplanets.org/event/habitable-worlds-2021-workshop/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201207
DTEND;VALUE=DATE:20201212
DTSTAMP:20260423T123138
CREATED:20200508T192641Z
LAST-MODIFIED:20200508T192641Z
UID:2176-1607299200-1607731199@cleverplanets.org
SUMMARY:AGU 2020
DESCRIPTION:San Francisco
URL:https://cleverplanets.org/event/agu-2020/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200621
DTEND;VALUE=DATE:20200627
DTSTAMP:20260423T123138
CREATED:20200513T221538Z
LAST-MODIFIED:20200513T221742Z
UID:2193-1592697600-1593215999@cleverplanets.org
SUMMARY:Goldschmidt 'Virtual' Conference 2020
DESCRIPTION:San Francisco
URL:https://cleverplanets.org/event/goldschmidt-virtual-conference/
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200531
DTEND;VALUE=DATE:20200605
DTSTAMP:20260423T123138
CREATED:20200204T171644Z
LAST-MODIFIED:20200204T171644Z
UID:2147-1590883200-1591315199@cleverplanets.org
SUMMARY:American Astronomical Society meeting
DESCRIPTION:Madison\, Wisconsin
URL:https://cleverplanets.org/event/american-astronomical-society-meeting/
END:VEVENT
END:VCALENDAR