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Iodine oxide in the global marine boundary layer

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Emitted mainly by the oceans, iodine is a halogen compound important for atmospheric chemistry due to its high ozone depletion potential and effect on the oxidizing capacity of the atmosphere. Here we present a comprehensive dataset of iodine oxide (IO) measurements in the open marine boundary layer...

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Main Authors: Prados-Román, Cristina (Author) , Cuevas, C. A. (Author) , Hay, T. (Author) , Fernandez, R. P. (Author) , Mahajan, A. S. (Author) , Royer, S.-J. (Author) , Galí, M. (Author) , Simó, R. (Author) , Dachs, J. (Author) , Großmann, Katja (Author) , Kinnison, D. E. (Author) , Lamarque, J.-F. (Author) , Saiz-Lopez, A. (Author)
Format: Article (Journal)
Language:English
Published: 29 August 2014
In: Atmospheric chemistry and physics. Discussions
Year: 2014, Volume: 14, Issue: 15, Pages: 22217-22243
ISSN:1680-7375
Online Access:Verlag, lizenzpflichtig, Volltext: http://adsabs.harvard.edu/abs/2014ACPD...1422217P
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Author Notes:C. Prados-Roman, C.A. Cuevas, T. Hay, R.P. Fernandez, A.S. Mahajan, S.-J. Royer, M. Galí, R. Simó, J. Dachs, K. Großmann, D.E. Kinnison, J.-F. Lamarque, and A. Saiz-Lopez
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Summary:Emitted mainly by the oceans, iodine is a halogen compound important for atmospheric chemistry due to its high ozone depletion potential and effect on the oxidizing capacity of the atmosphere. Here we present a comprehensive dataset of iodine oxide (IO) measurements in the open marine boundary layer (MBL) made during the Malaspina 2010 - circumnavigation. Results show IO mixing ratios ranging from 0.4 to 1 pmol mol-1 and, complemented with additional field campaigns, this dataset confirms through observations the ubiquitous presence of reactive iodine chemistry in the global marine environment. We use a global model with organic (CH3I, CH2ICl, - CH2I2 and CH2IBr) and inorganic (HOI and I2) iodine ocean emissions to investigate the - contribution of the different iodine source gases to the budget of IO in the global MBL. In agreement with previous estimates, our results indicate that, globally averaged, the abiotic precursors contribute about 75% to the iodine oxide budget. However, this work reveals a strong geographical pattern in the contribution of organic vs. inorganic precursors to reactive iodine in the global MBL.
Item Description:Gesehen am 20.01.2021
Physical Description:Online Resource
ISSN:1680-7375

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