Fractal dimension and anisotropy of soil CO2 emission in an agricultural field during fallow
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Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Polish Acad Sciences
Type
Article
Access right
Acesso aberto
Abstract
The study of soil CO2 emission is a relevant task due to the fact that it is related to many environmental issues, especially the enhanced greenhouse effect. In this work we investigated the spatial variability structure of a bare soil CO2 emission in an area of 80 x 80 m, during twelve different days. Spatial and temporal variability analyses in the 65-point grid indicate that significant spatial heterogeneity is present in most of the days. Fractal dimension values varying from 2 to 2.88 was determined in a direction of 84.3 +/- 22.5 degrees, which is close to perpendicular of crop lines. This effect seems to be related to the structure of temporal variability of Soil CO2 emission, which presents a complex net of correlation with 83% of grid points connected within the same cluster, also with most of the points aligned perpendicular to crop lines.
Description
Keywords
Soil respiration, Soil CO2 flux, Spatial variability, greenhouse gas
Language
English
Citation
International Agrophysics. Lublin: Polish Acad Sciences, v. 23, n. 4, p. 353-358, 2009.
