Long-term monitoring of carbon and oxygen isotope ratios of stratospheric CO2over Japan

Autor:	Makoto Tsutsumi, Toshitaka Gamo, Takakiyo Nakazawa, Toshinobu Machida, Tomizo Itoh, Hideyuki Honda, Hitoshi Sakai
Rok vydání:	1995
Předmět:	Oxygen-18 Meteorology Carbon-13 chemistry.chemical_element Atmospheric sciences Isotopes of oxygen Troposphere chemistry.chemical_compound Geophysics Altitude chemistry Carbon dioxide General Earth and Planetary Sciences Environmental science Carbon Stratosphere
Zdroj:	Geophysical Research Letters. 22:397-400
ISSN:	0094-8276
DOI:	10.1029/94gl03269
Popis:	We have been measuring stable isotopic ratios of carbon (delta-C-13) and oxygen (delta-O-18) of carbon dioxide in the stratosphere (18-35 km altitudes) over Japan since 1985, presenting here the first temporal delta-C-13 and delta-O-18 records between 1985 and 1991. The stratospheric delta-C-13 is gradually decreasing due to anthropogenic effects with a rate of approximately -0.03%/y, which is similar to the tropospheric value. The previously found O-18 enrichment is stratospheric CO2 has been maintained almost steadily during the 6 years, with a monotonous delta-O-18 increase with increasing altitude up to 35 km over Japan.
Databáze:	OpenAIRE
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