1994
DOI: 10.1029/94jd01951
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Evidence for interannual variability of the carbon cycle from the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory Global Air Sampling Network

Abstract: The distribution and variations of atmospheric CO2 from 1981 to 1992 were determined by measuring CO2 mixing ratios in samples collected weekly at a cooperative global air sampling network. The results constitute the most geographically extensive, carefully calibrated, internally consistent CO2 data set available. Analysis of the data reveals that the global CO2 growth rate has declined from a peak of ∼2.5 ppm yr−1 in 1987–1988 to ∼0.6 ppm yr−1 in 1992. In 1992 we find no increase in atmospheric CO2 from 30° t… Show more

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Cited by 763 publications
(597 citation statements)
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“…Seasonal NEE fluxes are controlled by both the magnitude and timing of NPP and the temperature sensitivity of heterotrophic respiration (Kaminski et al, 2002;Randerson et al, 2002). Measurements of the annual cycle are a robust constraint at a large spatial scale on the combined set of processes regulating NEE because (1) ocean and fossil fuel fluxes contribute only weakly to seasonal variations in CO 2 in the northern hemisphere Heimann et al, 1998;Nevison et al, 2008) and (2) the CO 2 measurements are precise (Conway et al, 1994). These data-model comparisons are sensitive, however, to biases in the atmospheric model-particularly with respect to convection, planetary boundary layer mixing, and other processes that regulate vertical mixing (Stephens et al, 2007;Yang et al, 2007).…”
Section: The Annual Cycle Of Atmospheric Carbon Dioxidementioning
confidence: 99%
“…Seasonal NEE fluxes are controlled by both the magnitude and timing of NPP and the temperature sensitivity of heterotrophic respiration (Kaminski et al, 2002;Randerson et al, 2002). Measurements of the annual cycle are a robust constraint at a large spatial scale on the combined set of processes regulating NEE because (1) ocean and fossil fuel fluxes contribute only weakly to seasonal variations in CO 2 in the northern hemisphere Heimann et al, 1998;Nevison et al, 2008) and (2) the CO 2 measurements are precise (Conway et al, 1994). These data-model comparisons are sensitive, however, to biases in the atmospheric model-particularly with respect to convection, planetary boundary layer mixing, and other processes that regulate vertical mixing (Stephens et al, 2007;Yang et al, 2007).…”
Section: The Annual Cycle Of Atmospheric Carbon Dioxidementioning
confidence: 99%
“…The total amount of CO2 entering the atmosphere each year through these processes is relatively well quantified [Andres et al, 1996; Houghton, 1995], as is the rate of accumulation of atmospheric CO2 [Conway et al, 1994]. …”
Section: Introductionmentioning
confidence: 99%
“…N20 , for example, with its photochemical destruction in the middle stratosphere and above, has a long history as a stratospheric tracer; it has been used to diagnose polar descent and mixing between middle latitudes and the polar vortices [Schoeberl et al, 1992;Strahan et al, 1994;Eluszkiewicz et al, 1995]. CO2 has the potential to be a good tracer because of its source function at the surface, which has a large secular increase (--• 1.5 ppm/yr) and a large-amplitude, latitudedependent seasonal cycle (> 15 ppm at high northern latitudes) [Conway et al, 1994]. In the middle and upper stratosphere, methane oxidation provides a small source for CO2, but this has a negligible effect on horizontal gradients in the lower stratosphere [Hall and Prather, 1993].…”
Section: Introductionmentioning
confidence: 99%