Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..397g&link_type=abstract
Geophysical Research Letters, Volume 22, Issue 4, p. 397-400
Physics
11
Atmospheric Composition And Structure: Geochemical Cycles, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques
Scientific paper
We have been measuring stable isotopic ratios of carbon (δ13C) and oxygen (δ18O) of carbon dioxide in the stratosphere (18-35 km altitudes) over Japan since 1985, presenting here the first temporal δ13C and δ18O records between 1985 and 1991. The stratospheric δ13C is gradually decreasing due to anthropogenic effects with a rate of approximately -0.03 per thousand y-1, which is similar to the tropospheric value. The previously found 18O enrichment in stratospheric CO2 has been maintained almost steadily during the 6 years, with a monotonous δ18O increase with increasing altitude up to 35 km over Japan.
Gamo Toshitaka
Honda Hideyuki
Itoh Tomizo
Machida Toshinobu
Nakazawa Takakiyo
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