Comparative impact of climatic and nonclimatic factors on global terrestrial carbon and water cycles
Article first published online: 30 NOV 2006
Copyright 2006 by the American Geophysical Union.
Global Biogeochemical Cycles
Volume 20, Issue 4, December 2006
How to Cite
2006), Comparative impact of climatic and nonclimatic factors on global terrestrial carbon and water cycles, Global Biogeochem. Cycles, 20, GB4015, doi:10.1029/2006GB002742., , , , and (
- Issue published online: 30 NOV 2006
- Article first published online: 30 NOV 2006
- Manuscript Accepted: 27 JUL 2006
- Manuscript Revised: 12 JUL 2006
- Manuscript Received: 21 APR 2006
- biogeochemical cycles;
- human activity;
- land use
 The coupled global carbon and water cycles are influenced by multiple factors of human activity such as fossil-fuel emissions and land use change. We used the LPJmL Dynamic Global Vegetation Model (DGVM) to quantify the potential influences of human demography, diet, and land allocation, and compare these to the effects of fossil-fuel emissions and corresponding climate change. For this purpose, we generate 12 land use patterns in which these factors are analyzed in a comparative static setting, providing information on their relative importance and the range of potential impacts on the terrestrial carbon and water balance. We show that these aspects of human interference are equally important to climate change and historic fossil-fuel emissions for global carbon stocks but less important for net primary production (NPP). Demand for agricultural area and thus the magnitude of impacts on the carbon and water cycles are mainly determined by constraints on localizing agricultural production and modulated by total demand for agricultural products.