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Tropical cyclones drive enhanced inorganic iodine in the mid-latitude upper troposphere

Halogens deplete tropospheric and stratospheric ozone, but the role of iodine is still elusive. Atmospheric iodine mainly originates from marine inorganic (I2, HOI) and organic (CH3I, CH2I2, CH2IBr, and CH2ICl) emissions. We report on airborne measurements of atmospheric iodine oxide (IO) concentrat...

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Autori principali: Voss, Karolin (Autore) , Vogel, Bärbel (Autore) , Diederich, Thorsten (Autore) , Engel, Andreas (Autore) , Grooß, Jens-Uwe (Autore) , Keber, Timo (Autore) , Kluge, Flora (Autore) , Rotermund, Meike (Autore) , Schuck, Tanja (Autore) , Weyland, Benjamin (Autore) , Butz, André (Autore) , Pfeilsticker, Klaus (Autore)
Natura: Article (Journal) Editorial
Lingua:inglese
Pubblicazione: 28 May 2026
In: Geophysical research letters
Year: 2026, Volume: 53, Fascicolo: 10, Pages: 1-12
ISSN:1944-8007
DOI:10.1029/2025GL120749
Accesso online:Verlag, kostenfrei, Volltext: https://doi.org/10.1029/2025GL120749
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1029/2025GL120749
Testo
Note sull'autore:Karolin Voss, Bärbel Vogel, Thorsten Diederich, Andreas Engel, Jens-Uwe Grooß, Timo Keber, Flora Kluge, Meike K. Rotermund, Tanja Schuck, Benjamin Weyland, André Butz, and Klaus Pfeilsticker
Descrizione
Riassunto:Halogens deplete tropospheric and stratospheric ozone, but the role of iodine is still elusive. Atmospheric iodine mainly originates from marine inorganic (I2, HOI) and organic (CH3I, CH2I2, CH2IBr, and CH2ICl) emissions. We report on airborne measurements of atmospheric iodine oxide (IO) concentrations up to 15 km altitude from two flights of the WISE campaign over the mid-Atlantic in September and October 2017. IO is retrieved from limb scattered skylight in the upper troposphere (UT) using the airborne mini-DOAS instrument on board the German High Altitude and LOng range research aircraft (HALO). Elevated IO (maximum \0.58\hspace*.5em\mathrmp\mathrmp\mathrmt\, mean \0.36\pm 0.08\hspace*.5em\mathrmp\mathrmp\mathrmt\ over \2.5\hspace*.5em\mathrmhr\) was observed in the UT in air masses processed by category 5 hurricanes Irma and Maria. Our findings show that enhanced IO mixing ratios are driven by fast vertical transport through tropical cyclones and potentially enhanced marine iodine emissions due to associated high surface winds.
Descrizione del documento:Zuerst veröffentlicht: 17 May 2026
Gesehen am 08.07.2026
Descrizione fisica:Online Resource
ISSN:1944-8007
DOI:10.1029/2025GL120749

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