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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 109,
D06115,
doi:10.1029/2003JD004046,
2004
Stable isotopic composition of water vapor in the tropics
James Robert Lawrence
Department of Geosciences, University of Houston, Houston, Texas, USA
Stanley David Gedzelman
Department of Earth and Atmospheric Sciences and Cooperative Remote Sensing Science and Technology Center (CREST), City College
of New York, New York, New York, USA
Darielle Dexheimer
Department of Atmospheric Sciences, Texas A&M University, College Station, Texas, USA
Hye-Khung Cho
Department of Atmospheric Sciences, Texas A&M University, College Station, Texas, USA
Gordon D. Carrie
School of Meteorology, University of Oklahoma, Norman, Oklahoma, USA
Robert Gasparini
Department of Atmospheric Sciences, Texas A&M University, College Station, Texas, USA
Casey R. Anderson
URS Corporation, Dallas, Texas, USA
Kenneth P. Bowman
Department of Atmospheric Sciences, Texas A&M University, College Station, Texas, USA
Mike I. Biggerstaff
School of Meteorology, University of Oklahoma, Norman, Oklahoma, USA
Abstract
Water vapor samples collected during tropical field experiments at Puerto Escondido, Mexico, near Kwajalein (KWAJEX), and
near Key West, Florida (CAMEX 4), were analyzed for their stable isotope contents, 1H2
18O:1H2
16O and 2H1H16O:1H2
16O. Highest δ18O values approached isotopic equilibrium with seawater during quiescent weather or in regions of isolated or disorganized
convection. Lowest δ18O values occurred in or downwind from regions of organized mesoscale weather disturbances and ranged as low as 15‰ below isotopic
equilibrium with seawater. The mean δ18O value of vapor over the sea surface therefore decreases as storm activity and organization increases.
Received 4
August
2003;
accepted 9
December
2003;
published 27
March
2004.
Index Terms: 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry; 1040 Geochemistry: Isotopic composition/chemistry; 1620 Global Change: Climate dynamics (3309); 3374 Meteorology and Atmospheric Dynamics: Tropical meteorology; 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology.
Read Full Article (file size: 1052946 bytes) Cited by
Citation: Lawrence, J. R., S. D. Gedzelman, D. Dexheimer, H.-K. Cho, G. D. Carrie, R. Gasparini, C. R. Anderson, K. P. Bowman, and M. I. Biggerstaff
(2004),
Stable isotopic composition of water vapor in the tropics,
J. Geophys. Res.,
109,
D06115,
doi:10.1029/2003JD004046.
Copyright 2004 by the American Geophysical Union.
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