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- W2090910545 abstract "[1] We have collected and analyzed air samples for 13CO, C18O, and CO concentration at Barbados, West Indies (13°N, 59°W), from July 1996 to May 2000. The δ13C values during the summer of 1996 and 1997 are among the lowest values reported for atmospheric CO, at less than −34‰ (Peedee belemnite-CO2), but seasonal maxima are close to that reported at other stations. Seasonal lows for 1998 and 1999 are between −32.5‰ and −33‰, which is also lower than observations at higher-latitude sites. Such low values are difficult to simulate by considering the well-established CO sources alone, and may indicate a small, but very isotopically depleted, source of CO from the marine boundary layer, such as chlorine-catalyzed destruction of CH4. We directly compare the observations at Barbados with data from middle-latitude and high-latitude Northern Hemisphere sites and construct a latitudinal dependence in the seasonal amplitude of both 13CO and C18O. We then investigate the source strengths of CO at this site using a three-dimensional inverse model analysis, which has also been used to simulate the other data sets. Model simulations reproduce the seasonal variations in [CO], δ13C, and δ18O but do not predict the large amplitude of δ13C (which is due to the very depleted summertime δ13C values) or the absolute values for 18O. We also include a calculation of the relative strengths of certain sources based on the model inversion." @default.
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- W2090910545 date "2003-01-01" @default.
- W2090910545 modified "2023-09-29" @default.
- W2090910545 title "The seasonally varying isotopic composition of the sources of carbon monoxide at Barbados, West Indies" @default.
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- W2090910545 doi "https://doi.org/10.1029/2003jd003419" @default.
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