Український антарктичний журнал

Том 21 № 2(27) (2023): Український антарктичний журнал
Articles

Абіотичні шляхи утворення озоноруйнуючих та інших слідових газів у політермальному льодовику на острові Галіндез, морська Антарктика

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  • М. Базилевська,
  • В. Богилло
М. Базилевська
Інститут геологічних наук, НАН України, м. Київ, 01054, Україна
В. Богилло
Інститут геологічних наук, НАН України, м. Київ, 01054, Україна
Spectrograms of the signal emitted from Vernadsky and received onboard RV Noosfera after reflection from the ionosphere, the black line shows the X component of the geomagnetic field measured at the Vernadsky AIA station. See paper Zalizovski et al. 2024 (page 195). Photo by S. Glotov and from the archive of the SI NASC
DOI: https://doi.org/10.33275/1727-7485.2.2023.715
Опубліковано December 31, 2023
Ключові слова
  • S-вмісні пептиди,
  • вуглеводні,
  • галогеновуглеводні,
  • накладений лід,
  • сніговий покрив,
  • фірн
    • ...Більше
    Менше
Як цитувати
Базилевська, М., & Богилло, В. (2023). Абіотичні шляхи утворення озоноруйнуючих та інших слідових газів у політермальному льодовику на острові Галіндез, морська Антарктика. Український антарктичний журнал, 21(2(27), 150-174. https://doi.org/10.33275/1727-7485.2.2023.715

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Анотація

Метою дослідження є аналіз слідових газів у складі політермального льодовика на острові Галіндез у морській Антарктиці (65o14' пд.ш., 64o16' зах.д.) та можливих шляхів їх абіотичного утворення в сніговому покрові та в накладеному або старому холодному льоді. Політермальні льодовики є найбільш чутливими індикаторами зміни клімату та ідеальними регіонами для вивчення хімічного складу атмосфери, снігу, фірну та льоду під впливом поточного потепління клімату. Це дослідження є першою спробою оцінити діапазон концентрації великої кількості слідових газів (крім раніше досліджених O2, N2, Ar і CO2) у політермальних і помірних льодовиках, які поширені в Гренландії, Шпіцбергені, Канадській Арктиці, Алясці, Альпах, Андах, Тибеті, Алтаї і в морській Антарктиці. Пористість льоду коливається від 0.6% до (характерних для накладеного льоду) 7%. Якісний аналіз за допомогою GC-MS було проведено для більше ніж 200 органічних і неорганічних слідових газів у складі цього льодовика. Було проведено кількісний аналіз 27 сполук уздовж вертикального профілю льодовика, включаючи CO2 і N2O, фреони, хлорвмісні розчинники, які заборонені Монреальським протоколом, F-, Cl-, Br- та I-вмісні галогеновуглеводні, COS, CS2, CH3SCH3, CH3SSCH3 і пропілен. Більшість галогеновуглеводнів, сірковмісних сполук і пропілен характеризуються високими коефіцієнтами збагачення і відносними параметрами. Це свідчить про можливість їх утворення в сніговому покриві та фірні льодовика або в його глибокому льоді. Можливі шляхи утворення газів включають прямі та непрямі фотохімічні реакції триплетного стану розчиненої органічної речовини (РОР) без або в присутності йонів X (X = Cl, Br, I), окисно-відновні реакції Fe3+, Mn4+, Cu2+, O3, H2O2 або радикалів HOx з РОР у присутності X-, реакції HOX з РОР (за участю HOx, H2O2 або O3), вільнорадикальні реакції з алкенами, алкінами та алкільними радикалами, а також різноманітні реакції метилметіоніну та/або S-вмісних пептидів.

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