Results 31 to 40 of about 21,178 (146)

Carbon and Energy Balance in a Primary Amazonian Forest and Its Relationship with Remote Sensing Estimates

Remote Sensing
With few measurement sites and a great need to validate satellite data to characterize the exchange of energy and carbon fluxes in tropical forest areas, quantified by the Net Ecosystem Exchange (NEE) and associated with phenological measurements, there ...
Mailson P. Alves, Rommel B. C. da Silva, Cláudio M. Santos e Silva, Bergson G. Bezerra, Keila Rêgo Mendes, Larice A. Marinho, Melahel L. Barbosa, Hildo Giuseppe Garcia Caldas Nunes, José Guilherme Martins Dos Santos, Theomar Trindade de Araújo Tiburtino Neves, Raoni A. Santana, Lucas Vaz Peres, Alex Santos da Silva, Petia Oliveira, Victor Hugo Pereira Moutinho, Wilderclay B. Machado, Iolanda M. S. Reis, Marcos Cesar da Rocha Seruffo, Avner Brasileiro dos Santos Gaspar, Waldeir Pereira, Gabriel Brito-Costa   +20 more
doaj   +1 more source

Monitoring Changes in the Enhanced Vegetation Index to Inform the Management of Forests

Remote Sensing
In the absence of forest ecosystem time series data, monitoring proxies such as the enhanced vegetation index (EVI) can inform the capacity of forests to provide ecosystem services. We used MODIS-derived EVI at 250 m and 16-day resolution and Breaks for Additive and Seasonal Trend (BFAST) algorithms to monitor forest EVI changes (breaks and trends) in ...
Peter S. Rodriguez, Amanda M. Schwantes, Andrew Gonzalez, Marie-Josée Fortin   +3 more
openaire   +2 more sources

A Phenology-Based Evaluation of the Optimal Proxy for Cropland Suitability Based on Crop Yield Correlations from Sentinel-2 Image Time-Series

Agriculture
Cropland suitability calculations quantify natural suitability according to abiotic conditions, thus making them crucial for sustainable land management. However, since ground-truth yield data are extremely scarce, there is a need to improve knowledge on
Dorijan Radočaj, Mladen Jurišić
doaj   +1 more source

Application of a novel vegetation condition index using MODIS EVI for structuring crop index insurance under a smallholder system

Environmental and Sustainability Indicators
Because of the ongoing pressure from climate change, there is a greater need for improved crop index insurance systems, and earth observation technology has made this possible.
Andualem Aklilu Tesfaye, Daniel Edward Osgood, Berhane Gessesse Aweke   +2 more
doaj   +1 more source

Comparison of the Continuity of Vegetation Indices Derived from Landsat 8 OLI and Landsat 7 ETM+ Data among Different Vegetation Types

Remote Sensing, 2015
Landsat 8, the most recently launched satellite of the series, promises to maintain the continuity of Landsat 7. However, in addition to subtle differences in sensor characteristics and vegetation index (VI) generation algorithms, VIs respond differently
Xiaojun She, Lifu Zhang, Yi Cen, Taixia Wu, Changping Huang, Muhammad Hasan Ali Baig   +5 more
doaj   +1 more source

Land-Cover Phenologies and Their Relation to Climatic Variables in an Anthropogenically Impacted Mediterranean Coastal Area

Remote Sensing, 2010
Mediterranean coastal areas are experiencing rapid land cover change caused by human-induced land degradation and extreme climatic events. Vegetation index time series provide a useful way to monitor vegetation phenological variations.
Encarni I. Hernández, Magaly Koch, Ignacio Gómez, Jose Navarro-Pedreño, Ignacio Melendez-Pastor   +4 more
doaj   +1 more source

Antecedent Rainfall, Excessive Vegetation Growth and Its Relation to Wildfire Burned Areas in California

Earth and Space Science, 2021
In recent years, California has experienced wildfire seasons of increasing frequency and magnitude, especially in terms of wildfire burned areas. Here, we investigate the precipitation and vegetation growth preceding each wildfire season for the 2001 ...
José J. Hernández Ayala, Jenna Mann, Elisabeth Grosvenor   +2 more
doaj   +1 more source

Quantifying surface gradients with a 2-band Enhanced Vegetation Index (EVI2)

Ecological Indicators, 2011
Quantification of spatial and temporal heterogeneity has been given much attention in order to link ecological patterns to processes. The patch mosaic model, as an operational paradigm, has led to major advances in the field of quantitative landscape ecology.
Department of Geography, Land Use and Environmental Change Institute (LUECI), University of Florida Turlington Hall, PO Box 117315, Gainesville, FL 32611-7315, USA ( host institution ), Mondal, Pinki   +2 more
openaire   +2 more sources

VEGETATION INDICES FOR IRRIGATED CORN MONITORING [PDF]

Engenharia Agrícola, 2020
Monitoring of large agricultural lands is often hampered by data collection logistics at field level. To solve such a problem, remote sensing techniques have been used to estimate vegetation indices, which can subsidize crop management decision-making ...
Francisco C. G. Alvino, Catariny C. Aleman, Roberto Filgueiras, Daniel Althoff, Fernando F. da Cunha   +4 more
doaj   +1 more source

SPATIAL CORRELATION OF SOYBEAN PRODUCTIVITY, ENHANCED VEGETATION INDEX (EVI) AND AGROMETEOROLOGICAL VARIABLES [PDF]

Engenharia Agrícola, 2017
ABSTRACT The survey information from growing regions, the interaction with the vegetation index and climatic variables is of great importance in the search for soybean productivity increase. Paraná is the second largest soybean producer in Brazil and presents great spatial variability, both in periods of the crop cycle as in soil and climate.
Grzegozewski, Denise M., Uribe-Opazo, Miguel A., Johann, Jerry A., Guedes, Luciana P. C.   +3 more
openaire   +4 more sources