2008 Volume 59 Pages 31-38
Measurements of atmospheric CO2 and O3 were conducted on Rishiri Island (45°07′N, 141°12′E) in northern Japan from December 2006 to March 2007. Atmospheric CO2 and O3 varied over a time scale from a few minutes to months: from December to mid-February, atmospheric CO2 concentration was negatively correlated with the atmospheric O3 concentration. This negative correlation was due to the emission of CO2 by soil respiration and decomposition of O3 at the surface in the high latitudes of Eurasia, as well as on Rishiri Island. Contrary to the CO2-O3 relationship from December to mid-February, after mid-February atmospheric CO2 concentration sometimes correlated positively with the concentration of atmospheric O3. High atmospheric CO2 and O3 concentrations were probably due to the transport of the air mass affected by anthropogenic sources in densely populated areas in northeast Asia, including Japan, Korea, and China.
