Premium
Daytime OIO in the Gulf of Maine
Author(s) -
Stutz J.,
Pikelnaya O.,
Hurlock S. C.,
Trick S.,
Pechtl S.,
von Glasow R.
Publication year - 2007
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl031332
Subject(s) - iodine , daytime , differential optical absorption spectroscopy , absorption (acoustics) , environmental chemistry , chemistry , environmental science , atmospheric sciences , geology , organic chemistry , physics , optics
The potential importance of iodine for marine boundary layer (MBL) chemistry has found increasing recognition in recent years. However, observations of the key iodine species are sparse and the chemical reactions of the iodine oxides are not well understood. Here we present Differential Optical Absorption Spectroscopy observations of IO, OIO in the MBL of the Gulf of Maine, U.S., during Summer 2004. We report the first daytime observation of OIO, indicating that this compound is rather photostable. Mixing ratios of IO were similar to, and those of OIO higher than, values reported for European coastal sites. Calculations with the one‐dimensional model MISTRA show that the observed simultaneous presence of elevated OIO and NO x cannot be explained by currently known iodine chemistry. Our results lead to the conclusion that thus far unknown chemical reactions of iodine oxides, probably involving iodine nitrates, might occur in the MBL.