The Amazon Frontier of Land-Use Change: Croplands and Consequences for Greenhouse Gas Emissions

Earth Interactions

Gillian L.Galford¹ 

关键词: Carbon;    Deforestation;    Remote sensing;    Agricultural intensification;    Soybean;    Cerrado;   

DOI  :  10.1175/2010EI327.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

Abstract The Brazilian Amazon is one of the most rapidly developing agricultural frontiers in the world. The authors assess changes in cropland area and the intensification of cropping in the Brazilian agricultural frontier state of Mato Grosso using remote sensing and develop a greenhouse gas emissions budget. The most common type of intensification in this region is a shift from single- to double-cropping patterns and associated changes in management, including increased fertilization. Using the enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor, the authors created a green-leaf phenology for 2001–06 that was temporally smoothed with a wavelet filter. The wavelet-smoothed green-leaf phenology was analyzed to detect cropland areas and their cropping patterns. The authors document cropland extensification and double-cropping intensification validated with field data with 85% accuracy for detecting croplands and 64% and 89% accuracy for detecting single- a...

【 授权许可】

Unknown