Use este identificador para citar ou linkar para este item:
https://repositorio.inpa.gov.br/handle/1/18823
Título: | Amazonia and the modern carbon cycle: Lessons learned |
Autor: | Ometto, Jean Pierre Henry Balbaud Nobre, Antônio Donato Rocha, Humberto Ribeiro da Artaxo, Paulo Martinelli, Luiz Antônio |
Palavras-chave: | Carbon Carbon Dioxide Carbon Cycle Climate Change Deforestation Net Primary Production Biomass Biometry Climate Ecosystem Environmental Protection Metabolism Photosynthesis Physiology Review Tree Biomass Biometry Carbon Carbon Dioxide Climate Conservation Of Natural Resources Ecosystem Photosynthesis Trees Amazonia South America Western Hemisphere World |
Data do documento: | 2005 |
Revista: | Oecologia |
É parte de: | Volume 143, Número 4, Pags. 483-500 |
Abstract: | In this paper, we review some critical issues regarding carbon cycling in Amazonia, as revealed by several studies conducted in the Large Scale Biosphere Atmosphere Experiment in Amazonia (LBA). We evaluate both the contribution of this magnificent biome for the global net primary productivity/net ecosystem exchange (NPP/NEE) and the feedbacks of climate change on the dynamics of Amazonia. In order to place Amazonia in a global perspective and make the carbon flux obtained through the LBA project comparable with global carbon budgets, we extrapolated NPP/NEE values found by LBA studies to the entire area of the Brazilian Amazon covered by rainforest. The carbon emissions due to land use changes for the tropical regions of the world produced values from 0.96 to 2.4 Pg C year-1, while atmospheric CO2 inversion models have recently indicated that tropical lands in the Americas could be exchanging a net 0.62±1.15 Pg C year-1 with the atmosphere. The difference calculated from these two methods would imply a local sink of approximately 1.6-1.7 Pg C year-1, or a source of 0.85 ton C ha-1 year-1. Using our crude extrapolation of LBA values for the Amazon forests (5 million km2) we estimate a range for the C flux in the region of -3.0 to 0.75 Pg C year-1. The exercise here does not account for environmental variability across the region, but it is an important driver for present and future studies linking local process (i.e. nutrient availability, photosynthetic capacity, and so forth) to global and regional dynamic approaches. © Springer-Verlag 2005. |
DOI: | 10.1007/s00442-005-0034-3 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Não existem arquivos associados a este item.
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.