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dc.contributor.author
Barraza Bernadas, Verónica Daniela
dc.contributor.author
Grings, Francisco Matias
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Ferrazzoli, Paolo
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Huete, Alfredo Ramon
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Restrepo Coupe, Natalia
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Beringer, Jason
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Van Gorsel, Eva
dc.contributor.author
Karszenbaum, Haydee
dc.date.available
2017-06-06T15:12:01Z
dc.date.issued
2014-12
dc.identifier.citation
Barraza Bernadas, Verónica Daniela; Grings, Francisco Matias; Ferrazzoli, Paolo; Huete, Alfredo Ramon; Restrepo Coupe, Natalia; et al.; Behavior of multitemporal and multisensor passive microwave indices in Southern Hemisphere ecosystems; Wiley; Journal of Geophysical Research: Biogeosciences; 119; 12; 12-2014; 2231-2244
dc.identifier.issn
2169-8961
dc.identifier.uri
http://hdl.handle.net/11336/17563
dc.description.abstract
This study focused on the time series analysis of passive microwave and optical satellite data collected from six Southern Hemisphere ecosystems in Australia and Argentina. The selected ecosystems represent a wide range of land cover types, including deciduous open forest, temperate forest, tropical and semiarid savannas, and grasslands. We used two microwave indices, the frequency index (FI) and polarization index (PI), to assess the relative contributions of soil and vegetation properties (moisture and structure) to the observations. Optical-based satellite vegetation products from the Moderate Resolution Imaging Spectroradiometer were also included to aid in the analysis. We studied the X and Ka bands of the Advanced Microwave Scanning Radiometer-EOS and Wind Satellite, resulting in up to four observations per day (1:30, 6:00, 13:30, and 18:00 h). Both the seasonal and hourly variations of each of the indices were examined. Environmental drivers (precipitation and temperature) and eddy covariance measurements (gross ecosystem productivity and latent energy) were also analyzed. It was found that in moderately dense forests, FI was dependent on canopy properties (leaf area index and vegetation moisture). In tropical woody savannas, a significant regression (R2) was found between FI and PI with precipitation (R2 > 0.5) and soil moisture (R2 > 0.6). In the areas of semiarid savanna and grassland ecosystems, FI variations found to be significantly related to soil moisture (R2 > 0.7) and evapotranspiration (R2 > 0.5), while PI varied with vegetation phenology. Significant differences (p < 0.01) were found among FI values calculated at the four local times.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Passive Microwave
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Microwave Index
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Southern Hemisphere
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Ecosistems
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Geociencias multidisciplinaria
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Behavior of multitemporal and multisensor passive microwave indices in Southern Hemisphere ecosystems
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-01T16:46:39Z
dc.journal.volume
119
dc.journal.number
12
dc.journal.pagination
2231-2244
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Hoboken
dc.description.fil
Fil: Barraza Bernadas, Verónica Daniela. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Grings, Francisco Matias. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
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Fil: Ferrazzoli, Paolo. Universita Tor Vergata; Italia
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Fil: Huete, Alfredo Ramon. University of Technology; Australia
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Fil: Restrepo Coupe, Natalia. University of Technology; Australia
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Fil: Beringer, Jason. University of Western Australia; Australia
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Fil: Van Gorsel, Eva. CSIRO Oceans and Atmosphere Flagship; Australia
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Fil: Karszenbaum, Haydee. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.journal.title
Journal of Geophysical Research: Biogeosciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2014JG002626/abstract
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2014JG002626
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