Rapid Aggregation and Dissolution of Organic Aerosols in Liquid Methane on Titan

DOI Web Site 参考文献73件
  • Eito Hirai
    Earth–Life Science Institute (ELSI) Tokyo Institute of Technology Tokyo Japan
  • Yasuhito Sekine
    Earth–Life Science Institute (ELSI) Tokyo Institute of Technology Tokyo Japan
  • Naizhong Zhang
    Department of Earth and Planetary Science Tokyo Institute of Technology Tokyo Japan
  • Natsumi Noda
    Earth–Life Science Institute (ELSI) Tokyo Institute of Technology Tokyo Japan
  • Shuya Tan
    Institute for Extra‐cutting‐edge Science and Technology Avant‐garde Research (X‐star) Japan Agency for Marine‐Earth Science and Technology (JAMSTEC) Kanagawa Japan
  • Yoshio Takahashi
    Department of Earth and Planetary Science The University of Tokyo Tokyo Japan
  • Hiroyuki Kagi
    Geochemical Research Center Graduate School of Science The University of Tokyo Tokyo Japan

書誌事項

公開日
2023-06-13
資源種別
journal article
権利情報
  • http://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1029/2023gl103015
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>Complex organic aerosols in the upper atmosphere of Saturn's moon Titan reach the troposphere and surface, where a methane (CH<jats:sub>4</jats:sub>)‐based hydrological cycle occur. Previous studies have assumed no interactions between organic aerosols and liquid CH<jats:sub>4</jats:sub>, although the dissolution of low‐molecular‐weight photochemical products in liquid CH<jats:sub>4</jats:sub> has been considered. Here we report experimental results of soaking a laboratory analog (so‐called tholin) of Titan's organic aerosols in liquid CH<jats:sub>4</jats:sub> at 93–98 K for several hours and then evaporating the liquid, simulating wet–dry cycling on Titan. After wet–dry cycling, residual tholin particles form aggregates through cementation. Solid evaporitic deposits formed by evaporation of interacted liquid contain nitrogen‐bearing aromatics, suggesting selective dissolution of aromatics. Our results suggest that organic aerosols or high‐molecular‐weight compounds adsorbed on them partly dissolve in liquid CH<jats:sub>4</jats:sub> on Titan, even during short‐term wetting events, promoting the growth of aerosols to dune particles via aggregation and providing aromatics to evaporites.</jats:p>

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