@Article{AndersonMaArLaArBaPh:2010:ReSeDe,
author = "Anderson, Liana O. and Malhi, Yadvinder and Arag{\~a}o, Luiz E.
O. C. and Ladle, Richard and Arai, Egidio and Barbier, Nicolas and
Phillips, Oliver",
affiliation = "Univ Oxford, Environm Change Inst, Sch Geog \& Environm, Oxford
OX1 3QY, England and Univ Oxford, Environm Change Inst, Sch Geog
\& Environm, Oxford OX1 3QY, England and Univ Exeter, Sch Geog,
Exeter EX4 4RJ, Devon England and Univ Oxford, Sch Geog \&
Environm, Oxford OX1 3QY, England. Univ Fed Vicosa, Dept Agr \&
Environm Engn, Vicosa, MG Brazil and {} and IRD UMR Bot \&
Bioinformat Architecture Plantes AM, F-34398 Montpellier 05,
France and Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire
England",
title = "Remote sensing detection of droughts in Amazonian forest
canopies",
journal = "New Phytologist",
year = "2010",
volume = "187",
number = "3",
pages = "733--750",
keywords = "rain, water, climate change, data set, drought, fieldwork, forest
inventory, MODIS, mortality, phenology, photosynthesis, rainfall,
remote sensing, spatiotemporal analysis, tropical forest,
vegetation index, article, Brazil, drought, physiology, plant
leaf, season, sunlight, telecommunication, time, tree, physiology,
plant leaf, tree, Brazil, Droughts, Plant Leaves, Rain, Satellite
Communications, Seasons, Sunlight, Time Factors, Trees, Water,
Amazonia, Brazil, Droughts, Plant Leaves, Rain, Satellite
Communications, Seasons, Sunlight, Time Factors, Trees, Water.",
abstract = "Remote sensing data are a key tool to assess large forested areas,
where limitations such as accessibility and lack of field
measurements are prevalent. Here, we have analysed datasets from
moderate resolution imaging spectroradiometer (MODIS) satellite
measurements and field data to assess the impacts of the 2005
drought in Amazonia. We combined vegetation indices (VI) and
climatological variables to evaluate the spatiotemporal patterns
associated with the 2005 drought, and explore the relationships
between remotely-sensed indices and forest inventory data on tree
mortality. There were differences in results based on c4 and c5
MODIS products. C5 VI showed no spatial relationship with rainfall
or aerosol optical depth; however, distinct regions responded
significantly to the increased radiation in 2005. The increase in
the Enhanced VI (EVI) during 2005 showed a significant positive
relationship (P < 0.07) with the increase of tree mortality. By
contrast, the normalized difference water index (NDWI) exhibited a
significant negative relationship (P < 0.09) with tree mortality.
Previous studies have suggested that the increase in EVI during
the 2005 drought was associated with a positive response of forest
photosynthesis to changes in the radiation income. We discuss the
evidence that this increase could be related to structural changes
in the canopy.",
doi = "10.1111/j.1469-8137.2010.03355.x",
url = "http://dx.doi.org/10.1111/j.1469-8137.2010.03355.x",
issn = "0028-646X",
language = "en",
targetfile = "anderson.htm",
urlaccessdate = "15 jun. 2024"
}