Global Carbon Sinks and Their Variability Inferred from Atmospheric O 2 and δ 13 C
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- 31 March 2000
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 287 (5462) , 2467-2470
- https://doi.org/10.1126/science.287.5462.2467
Abstract
Recent time-series measurements of atmospheric O2 show that the land biosphere and world oceans annually sequestered 1.4 ± 0.8 and 2.0 ± 0.6 gigatons of carbon, respectively, between mid-1991 and mid-1997. The rapid storage of carbon by the land biosphere from 1991 to 1997 contrasts with the 1980s, when the land biosphere was approximately neutral. Comparison with measurements of δ13CO2 implies an isotopic flux of 89 ± 21 gigatons of carbon per mil per year, in agreement with model- and inventory-based estimates of this flux. Both the δ13C and the O2 data show significant interannual variability in carbon storage over the period of record. The general agreement of the independent estimates from O2and δ13C is a robust signal of variable carbon uptake by both the land biosphere and the oceans.Keywords
This publication has 21 references indexed in Scilit:
- Monitoring the isotopic composition of atmospheric CO2: Measurements from the NOAA Global Air Sampling NetworkJournal of Geophysical Research: Atmospheres, 1996
- Variability in the O2/N2 ratio of southern hemisphere air, 1991–1994: Implications for the carbon cycleGlobal Biogeochemical Cycles, 1996
- On the relations between the oceanic uptake of CO2 and its carbon isotopesGlobal Biogeochemical Cycles, 1996
- Partitioning of ocean and land uptake of CO2 as inferred by δ13C measurements from the NOAA Climate Monitoring and Diagnostics Laboratory Global Air Sampling NetworkJournal of Geophysical Research: Atmospheres, 1995
- Terrestrial ecosystems and the carbon cycleGlobal Change Biology, 1995
- Evidence for interannual variability of the carbon cycle from the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory Global Air Sampling NetworkJournal of Geophysical Research: Atmospheres, 1994
- Oceanic 13C/12C observations: A new window on ocean CO2 uptakeGlobal Biogeochemical Cycles, 1993
- What atmospheric oxygen measurements can tell us about the global carbon cycleGlobal Biogeochemical Cycles, 1993
- Revised budget for the oceanic uptake of anthropogenic carbon dioxideNature, 1992
- Atmospheric Oxygen in 1967 to 1970Science, 1970