Controls on atmospheric chloroiodomethane (CH2CII) in marine environments

Ruth K. Varner, Yong Zhou, Rachel S. Russo, Oliver W. Wingenter, Elliot L Atlas, Craig Stroud, Huiting Mao, Robert Talbot, Barkley C. Sive

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Mixing ratios of chloroiodomethane (CH2ClI) in ambient air were quantified in the coastal North Atlantic region (Thompson Farm, Durham, New Hampshire, and Appledore Island, Maine) and two remote Pacific areas (Christmas Island, Kiribati, and Oahu, Hawaii). Average mixing ratios were 0.15 ± 0.18 and 0.68 ± 0.66 parts per trillion by volume (pptv) at Thompson Farm and Appledore Island, respectively, compared to 0.10 ± 0.05 pptv at Christmas Island and 0.04 ± 0.02 pptv in Hawaii. Photolysis constrained the daytime mixing ratios of CH2ClI at all locations with the minimum occurring at 1600 local time. Daily average fluxes to the atmosphere were estimated from mixing ratios and loss due to photolysis at Appledore Island, Christmas Island and Hawaii, and were 58 ± 9, 19 ± 3, and 5.8 ± 1.0 nmol CH2ClI m-2 d-1, respectively. The measured sea-to-air flux from seawater equilibrator samples obtained near Appledore Island was 6.4 ± 2.9 m-nol CH2ClI m-2 d-1. Mixing ratios of CH2ClI at Appledore Island increased with increasing wind speed. The maximum mixing ratios observed at Thompson Farm (1.6 pptv) and Appledore Island (3.4 pptv) are the highest reported values to date, and coincided with high winds associated with the passage of Tropical Storm Bonnie. We estimate that high winds during the 2004 hurricane season increased the flux of CH2ClI from the North Atlantic Ocean by 8 ± 2%.

Original languageEnglish (US)
Article numberD10303
JournalJournal of Geophysical Research C: Oceans
Volume113
Issue number10
DOIs
StatePublished - May 27 2008

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marine environments
marine environment
mixing ratios
mixing ratio
Farms
Photolysis
Fluxes
farm
photolysis
Hurricanes
tropical storms
Air
Seawater
hurricanes
Atlantic Ocean
air
daytime
ambient air
hurricane
wind velocity

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Varner, R. K., Zhou, Y., Russo, R. S., Wingenter, O. W., Atlas, E. L., Stroud, C., ... Sive, B. C. (2008). Controls on atmospheric chloroiodomethane (CH2CII) in marine environments. Journal of Geophysical Research C: Oceans, 113(10), [D10303]. https://doi.org/10.1029/2007JD008889

Controls on atmospheric chloroiodomethane (CH2CII) in marine environments. / Varner, Ruth K.; Zhou, Yong; Russo, Rachel S.; Wingenter, Oliver W.; Atlas, Elliot L; Stroud, Craig; Mao, Huiting; Talbot, Robert; Sive, Barkley C.

In: Journal of Geophysical Research C: Oceans, Vol. 113, No. 10, D10303, 27.05.2008.

Research output: Contribution to journalArticle

Varner, RK, Zhou, Y, Russo, RS, Wingenter, OW, Atlas, EL, Stroud, C, Mao, H, Talbot, R & Sive, BC 2008, 'Controls on atmospheric chloroiodomethane (CH2CII) in marine environments', Journal of Geophysical Research C: Oceans, vol. 113, no. 10, D10303. https://doi.org/10.1029/2007JD008889
Varner, Ruth K. ; Zhou, Yong ; Russo, Rachel S. ; Wingenter, Oliver W. ; Atlas, Elliot L ; Stroud, Craig ; Mao, Huiting ; Talbot, Robert ; Sive, Barkley C. / Controls on atmospheric chloroiodomethane (CH2CII) in marine environments. In: Journal of Geophysical Research C: Oceans. 2008 ; Vol. 113, No. 10.
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