Air was collected systematically
from 1995 to 2005 over the Pacific from 30S to 55N in latitude by
ships-of-opportunity to monitor global trend of CO2 concentration
and its variation in the atmosphere. The
monitoring results showed that three El Niño events during 10 years mostly
affected regional and temporal variation of CO2 growth rate and its
budget. Variation of carbon isotope ratio showed that the CO2 flux
from terrestrial biosphere seemed to rapidly increase at that time, correlated
with global temperature anomaly. Oxygen isotope ratio had increasing trend in
this period, similar to the variation of temperature. Atmospheric 14CO2
variation also seemed to be influenced by El Niño event.
Author: H. Mukai, Y. Nojiri, Y. Tohjima, T. Machida, et al (lnmukaih at nies dot go dot jp)
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