HR: 10:25h
AN: A31F-01 INVITED     [PDF]
TI: What atmospheric oxygen measurements are telling us about the carbon cycle
AU: * Keeling, R F
EM: rkeeling@ucsd.edu
AF: Scripps Institution of Oceanography, 9500 Gilman Dr., La Jolla, CA 92093-0244
AB: Direct observations of changes in the oxygen content of the atmosphere have now been underway for more than a decade. The data reveal a rich spectrum of variabilty on seasonal and interannual time scales that are diagnostic of rates of photosynthesis and respiration in the land and marine biospheres and of rates of mixing and transport in the ocean and atmosphere. This paper will discuss how the oxygen data can be utilized, together with atmospheric CO2 data, to help separate land and oceanic contributions to CO2 variability and to provide a new window for resolving secular changes in ocean biogeochemistry. The paper will also highlight the expanding experimental capabilities for measurements of oxygen and related tracers.
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0400 Biogeosciences
DE: 4805 Biogeochemical cycles (1615)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting