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Effect of heterogeneousatmospheric CO2 on simulated global carbon budget

Global and Planetary Change

By:
, , , ,
DOI: 10.1016/j.gloplacha.2012.12.002

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Abstract

The effects of rising atmospheric carbon dioxide (CO2) on terrestrial carbon (C) sequestration have been a key focus in global change studies. As anthropological CO2 emissions substantially increase, the spatial variability of atmospheric CO2 should be considered to reduce the potential bias on C source and sink estimations. In this study, the global spatial–temporal patterns of near surface CO2 concentrations for the period 2003-2009 were established using the SCIAMACHY satellite observations and the GLOBALVIEW-CO2 field observations. With this CO2 data and the Integrated Biosphere Simulator (IBIS), our estimation of the global mean annual NPP and NEP was 0.5% and 7% respectively which differs from the traditional C sequestration assessments. The Amazon, Southeast Asia, and Tropical Africa showed higher C sequestration than the traditional assessment, and the rest of the areas around the world showed slightly lower C sequestration than the traditional assessment. We find that the variability of NEP is less intense under heterogeneous CO2 pattern on a global scale. Further studies of the cause of CO2 variation and the interactions between natural and anthropogenic processes of C sequestration are needed.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effect of heterogeneousatmospheric CO2 on simulated global carbon budget
Series title:
Global and Planetary Change
DOI:
10.1016/j.gloplacha.2012.12.002
Volume
101
Year Published:
2013
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Earth Resources Observation and Science (EROS) Center
Description:
19 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
33
Last page:
51