Found 56 document(s)
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Old-growth forests remove carbon dioxide from the atmosphere at rates that vary with climate and nitrogen deposition. The sequestered carbon dioxide is stored in live woody tissues and slowly decomposing organic matter i...
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The end of the Soviet Union and the collapse of its agricultural structures in the early 1990s has induced the abandonment of a large croplands area, which have been recovered by herbaceous plants. This widespread uninte...
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We apply a simulation model in order to quantify the patterns of carbon and nitrogen cycling within European grasslands. We map the fluxes of CO$_2$, N$_2$O and CH$_4$ exchanged with the atmosphere as controlled by clima...
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In TransCom-3 (Level 1), atmospheric CO 2 measurements from 76 monitoring stations for the period 1992-1996 and 16 atmospheric transport models were used to constrain annual mean CO 2 fluxes over 11 land and 11 ocean reg...
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Stable CO2 isotope measurements are increasingly used to partition the net CO2 exchange between terrestrial ecosystems and the atmosphere in terms of nonfoliar respiration (F-R) and net photosynthesis (F-A) in order to b...
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Spatial and temporal variations of atmospheric CO$_2$ concentrations contain information about surface sources and sinks, which can be quantitatively interpreted through tracer transport inversion. Previous CO$_2$ invers...
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[1] We have built the first comprehensive global three-dimensional model of delta(18)O in atmospheric CO2. The constructed model goes beyond all other approaches made until now, by simulating the diurnal variations and t...
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Atmospheric CO$_ 2$has increased at a nearly identical average rate of 3.3 and 3.2 Pg C yr$^{-1}$ for the decades of the 1980s and the 1990s, in spite of a large increase in fossil fuel emissions from 5.4 to 6.3 Pg C yr$...
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For the period 1980–89, we estimate a carbon sink in the coterminous United States between 0.30 and 0.58 petagrams of carbon per year (petagrams of carbon = 1015 grams of carbon). The net carbon flux from the atmosphere ...