Gas-chromatographic measurements of the atmospheric oxygen/nitrogen ratio at Hateruma Island and Cape Ochi-ishi, Japan

Details Gas-chromatographic measurements of the atmospheric oxygen/nitrogen ratio at Hateruma Island and Cape Ochi-ishi, Japan Gas-chromatographic measurements of the atmospheric oxygen/nitrogen ratio at Hateruma Island and Cape Ochi-ishi, Japan

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..55t&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. 55-1, CiteID 1653, DOI 10.1029/2003GL017282

Physics

6

Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Atmospheric Composition And Structure: Geochemical Cycles, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Global Change: Atmosphere (0315, 0325)

Scientific paper

The O2/N2 ratios were determined of air samples collected at Hateruma Island (lat 24°3'N, long 123°49'E) from July 1997 to December 2001, and at Cape Ochi-ishi (lat 43°10'N, long 145°30'E) from December 1998 to December 2001. The O2/N2 ratios, based on gas-chromatographic analysis, clearly showed decreasing trends and seasonal variations, increasing in spring and summer, and decreasing in autumn and winter. The amplitudes of the seasonal O2/N2 cycles for Ochi-ishi were twice as large as those for Hateruma. The average rates of decrease were 18.4 +/- 1.4 per meg yr-1 over a 4-year period (1998-2001) for Hateruma, and 19.2 +/- 1.6 per meg yr-1 over a 3-year period (1999-2001) for Ochi-ishi.

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