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- Title
Multi-scale correlation analysis of soil organic carbon with its influence factors using wavelet transform.
- Authors
JIANG Chun; QIAN Le-xiang; WU Zhi-feng; WEN Ya; DENG Nan-rong
- Abstract
Based on GIS, this paper chose the soil organic carbon (SOC) density in soil surface layer (0-20 cm) and its influence factors (NDVI, elevation, slope and aspect) as research objects, one-dimensional discrete wavelet transform (DWT) was used as the multi-scale decomposition tool to quantitatively revealed the multi-scale correlation relationships among SOC density and its influence factors on the grid scale along 4 transects of the mountainous area of Guangdong Province. The results showed that the correlation among SOC density and its influence factors was scale-dependent with varying degree. The influence of NDVI was strongest at the scales of 2, 8 and 16 km, while elevation showed its greatest influence at the scales of 8 and 16 km. The control action of slope was rather weak, with a less significant correlation depending on scale. The negative effect of aspect became stronger with increasing scale at >2 km scale. The SOC density of the different transects was affected by various factors, of which NDVI and elevation were the main factors, and slope and aspect only reacted with individual transects at larger scales.
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2013, Vol 24, Issue 12, p3415
- ISSN
1001-9332
- Publication type
Article