학술논문

Wildfires Vegetation Recovery through Satellite Remote Sensing and Functional Data Analysis
Document Type
article
Source
Mathematics, Vol 9, Iss 11, p 1305 (2021)
Subject
causal inference
functional data analysis
functional principal components analysis
function-on-scalar regression
landsat
NDVI
Mathematics
QA1-939
Language
English
ISSN
2227-7390
Abstract
In recent years, wildfires have caused havoc across the world, which are especially aggravated in certain regions due to climate change. Remote sensing has become a powerful tool for monitoring fires, as well as for measuring their effects on vegetation over the following years. We aim to explain the dynamics of wildfires’ effects on a vegetation index (previously estimated by causal inference through synthetic controls) from pre-wildfire available information (mainly proceeding from satellites). For this purpose, we use regression models from Functional Data Analysis, where wildfire effects are considered functional responses, depending on elapsed time after each wildfire, while pre-wildfire information acts as scalar covariates. Our main findings show that vegetation recovery after wildfires is a slow process, affected by many pre-wildfire conditions, among which the richness and diversity of vegetation is one of the best predictors for the recovery.