BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Boulder SWRI - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Boulder SWRI
X-ORIGINAL-URL:http://3.149.189.197
X-WR-CALDESC:Events for Boulder SWRI
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Denver
BEGIN:DAYLIGHT
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
TZNAME:MDT
DTSTART:20250309T090000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:20251102T080000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
TZNAME:MDT
DTSTART:20260308T090000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:20261101T080000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
TZNAME:MDT
DTSTART:20270314T090000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:20271107T080000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260518T110000
DTEND;TZID=America/Denver:20260518T120000
DTSTAMP:20260515T161711
CREATED:20260306T184357Z
LAST-MODIFIED:20260506T071356Z
UID:21793-1779102000-1779105600@3.149.189.197
SUMMARY:Ancient Seas\, Magma Oceans\, and Impact Basins: Geophysical Constraints on Planetary Evolution
DESCRIPTION:Geophysical models are powerful tools for testing planetary evolution hypotheses motivated by spacecraft observations. In this talk\, I present a synthesis of my work in planetary geodynamics through three recent research projects. First\, I use surface loading models to reconstruct paleo-ocean levels on Mars\, providing quantitative constraints on the geometry and timing of early Martian oceans. Second\, I present new 3D numerical simulations of convection in a rotating lunar magma ocean\, showing how hemispheric differences in heat flux can drive asymmetric flotation crust formation and explain the origin of the Lunar Asymmetry. Third\, I discuss new modeling approaches for the collapse and post-impact evolution of large impact basins\, and the importance of understanding such basins for upcoming Moon and Mars missions. Together\, these projects illustrate how geophysical modeling\, grounded in observational constraints from gravity\, topography\, and remote sensing\, deepens our understanding of the processes that shaped terrestrial planetary bodies.
URL:http://3.149.189.197/event/tbd-12/
LOCATION:Conference Room 4.615
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260526T110000
DTEND;TZID=America/Denver:20260526T120000
DTSTAMP:20260515T161711
CREATED:20260429T202631Z
LAST-MODIFIED:20260429T202800Z
UID:21880-1779793200-1779796800@3.149.189.197
SUMMARY:Origin of Hyperion and Saturn's Rings in a Two-stage Saturnian System Instability
DESCRIPTION:The age of the rings and some of the moons of Saturn is an open question\, and multiple lines of evidence point to a recent (few hundred Myr ago) cataclysm involving the disruption of past moons. The main driver of the evolution of the Saturnian system is the relatively rapid tidal expansion of its largest moon\, Titan\, which is likely driven by resonant tides within Saturn. The obliquity of Saturn and the orbit of the small moon Hyperion both serve as a record of the past orbital evolution of Titan. Saturn’s obliquity was likely generated by a secular spin─orbit resonance with the planets\, while Hyperion is caught in a mean-motion resonance with Titan\, with both phenomena driven by Titan’s orbital expansion. We propose that the breaking of Saturn’s spin resonance was also the event in which Hyperion formed\, when an outer mid-sized satellite (“Proto-Hyperion”) was destabilized and collided with Titan\, with some of the debris accreting into Hyperion. During the instability\, Proto-Hyperion’s perturbations produced the observed orbital inclination of Iapetus. The same event also excited the eccentricity of Titan\, which then\, through Titan’s resonant interaction with the inner moons\, led to destabilization\, collisional disruption\, and re-accretion of the inner moon system\, including the rings. We present numerical integrations that show that this chain of events has a relatively high probability\, and discuss how it fits within our knowledge of the Saturnian system.
URL:http://3.149.189.197/event/origin-of-hyperion-and-saturns-rings-in-a-two-stage-saturnian-system-instability/
LOCATION:Conference Room 4.615
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260602T110000
DTEND;TZID=America/Denver:20260602T120000
DTSTAMP:20260515T161711
CREATED:20260416T155628Z
LAST-MODIFIED:20260416T155628Z
UID:21857-1780398000-1780401600@3.149.189.197
SUMMARY:Environmental records in windblown sand dunes across the Solar System
DESCRIPTION:Windblown dunes are common features in our solar system\, forming on planetary surfaces that span wide ranges in gravity and both atmospheric and sediment properties. These features record time-integrated interactions between a planet’s atmosphere and surface. First\, I show how the patterns formed by dune crestlines record information about recent (<104 yr.)changes in environmental conditions (e.g.\, shifts in wind regime or varying sediment availability). When paired with an elementary approach to quantify dune migration\, these results suggest that the adjustment time of large dunes is often longer than the timescale of climate cyclicity. Furthermore\, this work offers a novel tool to detect and possibly quantify recent environmental change on planetary surfaces. The near-equatorial belt of dunes on Saturn’s moon Titan provides an ideal application of this framework. A dune pattern analysis reveals that dunes on Titan are interconnected and form the largest known dune field in the Solar System and lend critical insights into the material nature of sand grains themselves. \nNext\, the ubiquity of windblown features across planetary surface is nontrivial because of the specific conditions necessary for dune formation: wind speeds must be just right for grains to ballistically hop (“saltate”) across the surface. To understand how this happens\, I combined global wind reanalysis with grain size measurements and dune simulations to show that dune fields on Earth are characterized by a near-transport threshold state where dune-forming winds minimally exceed the saltation threshold. Importantly\, these results show that wind speeds can be precisely estimated from aeolian sandstones and dune deposits across planets. Finally\, we utilize wind and grain size measurements from the Curiosity rover to show that dunes at Gale crater on Mars are dynamically similar to their counterparts on Earth. Altogether\, dunes and their constitutive grains provide a robust record of their formative conditions\, opening new lines of investigation for paleo-environmental reconstructions on Earth and beyond.
URL:http://3.149.189.197/event/environmental-records-in-windblown-sand-dunes-across-the-solar-system/
LOCATION:BLDR-LL.110
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260616T110000
DTEND;TZID=America/Denver:20260616T120000
DTSTAMP:20260515T161711
CREATED:20260407T233626Z
LAST-MODIFIED:20260407T233626Z
UID:21833-1781607600-1781611200@3.149.189.197
SUMMARY:Date Reserved for Seminar for Scot Rafkin
DESCRIPTION:Details TBD\, being organized by Kelsi Singer and Scot Rafkin.
URL:http://3.149.189.197/event/date-reserved-for-seminar-for-scot-rafkin/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260630T110000
DTEND;TZID=America/Denver:20260630T110000
DTSTAMP:20260515T161711
CREATED:20251126T170022Z
LAST-MODIFIED:20260507T183436Z
UID:21556-1782817200-1782817200@3.149.189.197
SUMMARY:Vertically Mapping the Cloud-Driven Atmospheric Dynamics & Chemistry of an Isolated Exoplanet Analog
DESCRIPTION:Young planetary-mass objects and brown dwarfs near the L/T spectral transition exhibit enhanced spectrophotometric variability over field brown dwarfs. Patchy clouds\, auroral processes\, stratospheric hot spots\, and complex carbon chemistry have all been proposed as potential sources of this variability. Using time-resolved\, low-to-mid-resolution spectroscopy collected with the JWST/NIRISS and NIRSpec instruments\, we apply harmonic analysis to SIMP J0136\, a highly variable\, young\, isolated planetary-mass object. Odd harmonics (k=3) at pressure levels (> 1 bar) corresponding to iron and forsterite cloud formation suggest North/South hemispheric asymmetry in the cloudy\, and likely equatorial\, regions. We use the inferred harmonics\, along with 1-D substellar atmospheric models\, to map the flux variability by atmospheric pressure level. These vertical maps demonstrate robust interaction between deep convective weather layers and the overlying stratified and radiative atmosphere. We identify distinct time-varying structures in the near-infrared that we interpret as planetary-scale wave (e.g.\, Rossby or Kelvin)-associated cloud modulation. We detect variability in water (S/N = 14.0)\, carbon monoxide (S/N = 13.0)\, and methane (S/N = 14.9) molecular signatures. Forsterite cloud modulation is anti-correlated with overlying carbon monoxide and water abundances and correlated with deep methane absorption\, suggesting complex interaction between cloud formation\, atmospheric chemistry\, and temperature structure. Furthermore\, we identify distinct harmonic behavior between methane and carbon monoxide absorption bands\, providing evidence for time-resolved disequilibrium carbon chemistry. At the lowest pressures (< 100 mbar)\, we find that the mapped methane lines transition from absorption to emission\, supporting evidence of high-altitude auroral heating via electron precipitation.
URL:http://3.149.189.197/event/tbd-6/
LOCATION:Conference Room 4.615
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Denver:20260908T110000
DTEND;TZID=America/Denver:20260908T120000
DTSTAMP:20260515T161711
CREATED:20260415T192304Z
LAST-MODIFIED:20260506T001136Z
UID:21849-1788865200-1788868800@3.149.189.197
SUMMARY:Seminar- Abby Fraeman (JPL) - TBD Topic
DESCRIPTION:SwRI Seminar – Tuesday Sept 8 – Will be hybrid – Details TBD closer to the date!  (Contact Kelsi Singer for any questions)
URL:http://3.149.189.197/event/seminar-abby-fraeman-jpl-tbd-topic/
LOCATION:Hybrid – In-person and Online – See details below the abstract
END:VEVENT
END:VCALENDAR