February 28, 2007
GCRIO Program Overview
Our extensive collection of documents.
Archives of the
Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 11, NUMBER 12, DECEMBER 1998
OCEAN UPTAKE OF CO2
Quantification of Decadal Anthropogenic CO2 Uptake in
the Ocean Based on Dissolved Inorganic Carbon Measurements, T.-H.
Peng et al., Nature 396, 560-563 (1998).
New improvements in the techniques for measuring dissolved inorganic
carbon (DIC) in the oceans were used to determine the amount of
anthropogenic carbon sequestered as DIC by the Indian Ocean during the
past two decades (1978-1995). After corrections were made for
decadal-scale natural variability, the increase in CO2 uptake
during this period was found to be 1.64 × 1015 gC.
Low Interannual Variability in Recent Oceanic Uptake of Atmospheric
Carbon Dioxide, Kitack Lee et al., Nature 396,
The assumption was made that the partial pressure of CO2 (pCO2)
in surface seawater is determined by the observed thermodynamics,
biological processes, and mixing. Measurements of year-to-year changes in
sea-surface temperature and of regional and seasonal changes in the
relationship between seawater temperature and pCO2
were then used to deduce global changes in the uptake of CO2
by the oceans from year to year. The calculated interannual variability
that was calculated (0.4 GtCy¾1) is much too small to account for the
interannual variation in CO2 concentration observed in the
atmosphere. As a result, the variation in the atmosphere is assumed to be
produced largely by the seasonal variation in CO2 uptake by
Guide to Publishers
Index of Abbreviations