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Details for: Robina Shaheen
Robina Shaheen (University of California San Diego)
Theme chair: 07
I am physical chemist and use oxygen triple, sulfur quadruple isotopes and concomitant isotope anomalies to understand chemical and photo-chemical processes in the atmosphere. The isotopic signature preserved in rocks, ice and aerosols allows me to understand intricate interactions between atmosphere-hydrosphere-geosphere and biosphere. I have used ALH84001 (the most famous meteorite once cosidered to carry relics of life from Mars) and NWA70034 (Black Beauty) to constraint hydrosphere and CO2 cycle on Mars ~ 4.2 billion years ago. Meteorites are amazing gifts of nature to curious minds and I enjoy revealing the mysteries preserved in those rocks. I use sulfur and oxygen isotope anomalies to understand the hydrosphere and atmosphere interactions on earth and how high resolution record can shine light on the coupling between all spheres (atmo-hydro-geo-bio) as each one leaves its isotopic fingerprints in the aerosols that are transported to the stratosphere and preserved in the ice core records.Note: abstracts are only listed if one of the following email addresses was provided when the abstract was submitted: email@example.com. Otherwise, try an advanced search.
Keynote: Present Day Atmospheric S-Cycle Provide Clues to the Mystery of Precambrian S-Mif Signal
Shaheen R, Thiemens M & Lin M
07a/09:15/Th (2015) Sulfur Isotope Anomalies in Sulfate Aerosols and Solar System Materials: Understanding the Present is a Key to the Past
Shaheen R & Thiemens M
Theme chairGoldschmidt2018 - Theme 07: Chemistry of the Oceans and Atmosphere
Session convenerGoldschmidt2018 - Session 07a: Atmospheric Chemistry of Past and Present Earth and Mars