@Article{WangZAMBBMMRRG:2019:MaTrDi,
author = "Wang, Yunxia and Ziv, Guy and Adami, Marcos and Mitchard, Edward
and Batterman, Sarah A. and Buermann, Wolfgang and Marimon,
Beatriz Schwantes and Marimon Junior, Ben Hur and Reis, Simone
Matias and Rodrigues, Domingos and Galbraith, David",
affiliation = "{University of Leeds} and {University of Leeds} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {University of
Edinburgh} and {University of Leeds} and {University of Leeds} and
{University of Edinburgh} and {University of Edinburgh} and
{University of Edinburgh} and {Universidade Federal de Mato Grosso
(UFMT)} and {University of Leeds}",
title = "Mapping tropical disturbed forests using multi-decadal 30 m
optical satellite imagery",
journal = "Remote Sensing of Environment",
year = "2019",
volume = "22198",
pages = "474--788",
month = "Feb.",
abstract = "Tropical disturbed forests play an important role in global carbon
sequestration due to their rapid post-disturbance biomass
accumulation rates. However, the accurate estimation of the carbon
sequestration capacity of disturbed forests is still challenging
due to large uncertainties in their spatial distribution. Using
Google Earth Engine (GEE), we developed a novel approach to map
cumulative disturbed forest areas based on the 27-year time-series
of Landsat surface reflectance imagery. This approach integrates
single date features with temporal characteristics from six
time-series trajectories (two Landsat shortwave infrared bands and
four vegetation indices) using a random forest machine learning
classification algorithm. We demonstrated the feasibility of this
method to map disturbed forests in three different forest
ecoregions (seasonal, moist and dry forest) in Mato Grosso,
Brazil, and found that the overall mapping accuracy was high,
ranging from 81.3% for moist forest to 86.1% for seasonal forest.
According to our classification, dry forest ecoregion experienced
the most severe disturbances with 41% of forests being disturbed
by 2010, followed by seasonal forest and moist forest ecoregions.
We further separated disturbed forests into degraded old-growth
forests and post-deforestation regrowth forests based on an
existing post-deforestation land use map (TerraClass) and found
that the area of degraded old-growth forests was up to 62% larger
than the extent of post-deforestation regrowth forests, with 18%
of old-growth forests actually being degraded. Application of this
new classification approach to other tropical areas will provide a
better constraint on the spatial extent of disturbed forest areas
in Tropics and ultimately towards a better understanding of their
importance in the global carbon cycle.",
doi = "10.1016/j.rse.2018.11.028",
url = "http://dx.doi.org/10.1016/j.rse.2018.11.028",
issn = "0034-4257",
language = "en",
targetfile = "wang_mapping.pdf",
urlaccessdate = "27 abr. 2024"
}