BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:Storms\, surf\, &\; swells: Bedrock breakdown and the geodynami c demise of volcanic ocean islands - Kim Huppert - GFZ Postdam DTSTART:20210617T120000Z DTEND:20210617T130000Z UID:TALK160720@talks.cam.ac.uk CONTACT:Céline Marie Vidal DESCRIPTION:With homogeneous bedrock\, dramatic climate gradients\, and re mnant surfaces that constrain their age\, initial topography\, and vertica l motions relative to sea level\, volcanic ocean islands provide an except ional natural experiment in landscape evolution. Analyses traversing gradi ents in island climate and bedrock age have the potential to advance our u nderstanding of climatic and tectonic influences on landscape evolution in a diverse range of continental settings. Yet\, as net subsiding and bound ary-dominated landmasses\, islands are in some ways dissimilar to most con tinental landscapes\, and the mechanisms of island vertical motion remain largely enigmatic. Island uplift and subsidence can provide important obse rvational constraints on the rheology and dynamics of the Earth's interior \, in addition to setting the boundary conditions for the topographic\, cl imatic\, and biogeographic evolution of island landscapes. In this talk\, I exploit steep climate gradients in the Hawaiian Islands to quantify cont rols on fluvial and coastal erosion\, and I assess the contribution of lit hosphere and mantle processes to surface deformation at ocean hotspots. Th rough physically-based modeling\, analysis of topo-bathymetric and geochro nologic data\, and field measurements\, I examine (1) the control of rainf all variability on long-term rates of bedrock river incision on the Hawaii an Island of Kaua'i\, (2) the influence of wave power on bedrock coastal e rosion in the Hawaiian Islands\, and (3) the mechanisms that cause volcani c ocean islands to drown below sea level to form atolls and guyots. These analyses provide empirical support for hypothesized feedbacks between clim ate\, tectonics\, and topography\, linking the evolution of the solid eart h\, hydrosphere\, and biosphere. LOCATION: Zoom webinar - link to follow END:VEVENT END:VCALENDAR