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| Water vapor and carbon dioxides are very important greenhouse gases in the earth's atmosphere. During the circulation of these gases in the atmosphere-surface system, their isotopic species (isotopomers) change their mixing ratio through evaporation and condensation or emission and uptake processes depending on environmental conditions. Based on this nature, we can infer the origin of the gases and environmental conditions at which the gases are emitted into the atmosphere. The IMG sensor aboard ADEOS has spectral resolution capability to detect signals from isotopic species. Figure 2 shows horizontal distribution of one water vapor isotope, HDO, derived from analysis of IMG data. Usage of isotopic species as tracers of greenhouse gases is an effective approach to clarify circulation of greenhouse gases. |
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Figure 2: Horizontal distribution of Deuterium/Hydrogen ratio derived from
IMG data.
(Zakharov et al., 2004)
"Accepted for publication in [Geophys. Res. Lett.].
Copyright [2004]
American Geophysical Union. Further reproduction or
electronic
distribution is not permitted."