Publication Date:
2000-03-31
Description:
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 delta13CO2 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 delta13C and the O2 data show significant interannual variability in carbon storage over the period of record. The general agreement of the independent estimates from O2 and delta13C is a robust signal of variable carbon uptake by both the land biosphere and the oceans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Battle, M -- Bender, M L -- Tans, P P -- White, J W -- Ellis, J T -- Conway, T -- Francey, R J -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2467-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geoscience, Guyot Hall, Princeton University, Princeton, NJ 08544 USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741962" target="_blank"〉PubMed〈/a〉
Keywords:
*Atmosphere
;
Carbon/*analysis/*metabolism
;
Carbon Dioxide/analysis/metabolism
;
Carbon Isotopes
;
*Ecosystem
;
Nitrogen/analysis
;
Oceans and Seas
;
Oxygen/*analysis
;
Oxygen Consumption
;
Photosynthesis
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
