Amazon rainforests green-up with sunlight in dry season

Huete, A; Didan, K; Shimabukuro, Y; Ratana, P; Saleska, S; Hutyra, L; Yang, W; Nemani, R; Myneni, R

Amazon rainforests green-up with sunlight in dry season

Huete, A Didan, K Shimabukuro, Y Ratana, P Saleska, S Hutyra, L Yang, W Nemani, R Myneni, R

Permalink

Publisher:: Amer Geophysical Union
Publication Type:: Journal Article
Citation:: Huete Alfredo et al. 2006, 'Amazon rainforests green-up with sunlight in dry season', Amer Geophysical Union, vol. 33, no. 6, pp. L06405-1-L06405-4.
Issue Date:: 2006

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download 2010001588OK.pdfAdobe PDF (857.35 kB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Huete, A	en_US
dc.contributor.author	Didan, K	en_US
dc.contributor.author	Shimabukuro, Y	en_US
dc.contributor.author	Ratana, P	en_US
dc.contributor.author	Saleska, S	en_US
dc.contributor.author	Hutyra, L	en_US
dc.contributor.author	Yang, W	en_US
dc.contributor.author	Nemani, R	en_US
dc.contributor.author	Myneni, R	en_US
dc.date.accessioned	2012-02-02T05:50:56Z
dc.date.available	2012-02-02T05:50:56Z
dc.date.issued	2006	en_US
dc.identifier	2010001588	en_US
dc.identifier.citation	Huete Alfredo et al. 2006, 'Amazon rainforests green-up with sunlight in dry season', Amer Geophysical Union, vol. 33, no. 6, pp. L06405-1-L06405-4.	en_US
dc.identifier.issn	0094-8276	en_US
dc.identifier.other	C1UNSUBMIT	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14692
dc.description.abstract	Metabolism and phenology of Amazon rainforests significantly influence global dynamics of climate, carbon and water, but remain poorly understood. We analyzed Amazon vegetation phenology at multiple scales with Moderate Resolution Imaging Spectroradiometer (MODIS) satellite measurements from 2000 to 2005. MODIS Enhanced Vegetation Index (EVI, an index of canopy photosynthetic capacity) increased by 25% with sunlight during the dry season across Amazon forests, opposite to ecosystem model predictions that water limitation should cause dry season declines in forest canopy photosynthesis. In contrast to intact forests, areas converted to pasture showed dry-season declines in EVI-derived photosynthetic capacity, presumably because removal of deep-rooted forest trees reduced access to deep soil water. Local canopy photosynthesis measured from eddy flux towers in both a rainforest and forest conversion site confirm our interpretation of satellite data, and suggest that basin-wide carbon fluxes can be constrained by integrating remote sensing and local flux measurements.	en_US
dc.publisher	Amer Geophysical Union	en_US
dc.relation.ispartof	Verified OK	en_US
dc.relation.ispartof	Geophysical Research Letters	en_US
dc.relation.isbasedon	http://dx.doi.org/10.1029/2005GL025583	en_US
dc.subject.classification	Environmental Science and Management	en_US
dc.title	Amazon rainforests green-up with sunlight in dry season	en_US
dc.type	Journal article
utslib.citation.volume	33	en_US
utslib.citation.number	6	en_US
utslib.location	Washington DC, USA	en_US
utslib.citation.startpage	L06405-1	en_US
utslib.citation.endpage	L06405-4	en_US
utslib.identifier.org	SCI.Plant Functional Biology & Climate Change	en_US
utslib.for	050200	en_US
utslib.percentage	100	en_US
utslib.copyright.status	open_access

Abstract:

Metabolism and phenology of Amazon rainforests significantly influence global dynamics of climate, carbon and water, but remain poorly understood. We analyzed Amazon vegetation phenology at multiple scales with Moderate Resolution Imaging Spectroradiometer (MODIS) satellite measurements from 2000 to 2005. MODIS Enhanced Vegetation Index (EVI, an index of canopy photosynthetic capacity) increased by 25% with sunlight during the dry season across Amazon forests, opposite to ecosystem model predictions that water limitation should cause dry season declines in forest canopy photosynthesis. In contrast to intact forests, areas converted to pasture showed dry-season declines in EVI-derived photosynthetic capacity, presumably because removal of deep-rooted forest trees reduced access to deep soil water. Local canopy photosynthesis measured from eddy flux towers in both a rainforest and forest conversion site confirm our interpretation of satellite data, and suggest that basin-wide carbon fluxes can be constrained by integrating remote sensing and local flux measurements.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/14692