Results 31 to 40 of about 21,394 (244)

Methodological evaluation of vegetation indexes in land use and land cover (LULC) classification

Geology, Ecology, and Landscapes, 2020
Vegetation indices are intended to emphasize the vegetation spectral behavior in relation to the soil and other terrestrial surface targets. The objective of this study was to evaluate the vegetation cover types present in the municipality of Campo Belo ...
Vanessa Sousa da Silva, Gabriela Salami, Marília Isabelle Oliveira da Silva, Emanuel Araújo Silva, José Jorge Monteiro Junior, Elisiane Alba   +5 more
doaj   +1 more source

Comparative analysis of different vegetation indices with respect to atmospheric particulate pollution using sentinel data

Applied Computing and Geosciences, 2020
Several remote sensing based indices have been developed for studying vegetation using varied combinations of spectral bands. However, for regions like Gautam Buddha Nagar (GBN) district where the atmospheric condition is highly influenced by particulate
Shivangi S. Somvanshi, Maya Kumari
doaj   +1 more source

Estimating Riparian and Agricultural Actual Evapotranspiration by Reference Evapotranspiration and MODIS Enhanced Vegetation Index [PDF]

Remote Sensing, 2013
Dryland river basins frequently support both irrigated agriculture and riparian vegetation and remote sensing methods are needed to monitor water use by both crops and natural vegetation in irrigation districts. We developed an algorithm for estimating actual evapotranspiration (ETa) based on the Enhanced Vegetation Index (EVI) from the Moderate ...
Pamela L. Nagler, Edward P. Glenn, Uyen Nguyen, Russell L. Scott, Tanya Doody   +4 more
openaire   +2 more sources

Enhancing Vegetation Monitoring: A Proposal for a Sentinel-2 Based Vegetation Health Index

Frontiers in Remote Sensing
Vegetation serves as a vital carbon sink, crucial for regulating CO2 and O2 levels in the atmosphere. However, the declining health of vegetation can contribute to a rise in greenhouse gas emissions. Utilizing remote sensing satellite imagery, we can effectively monitor global changes in vegetation health in near-real time.
Sandeep Kumar, Swarnendu Sekhar Ghosh, Dipankar Mandal, Dipankar Mandal, Avik Bhattacharya, Alok Porwal, L. Karthikeyan, L. Karthikeyan   +7 more
openaire   +2 more sources

Examining the relationship between the Enhanced Vegetation Index and grapevine phenology

European Journal of Remote Sensing, 2014
AbstractMonitoring the main grapevine phenological stages is a key procedure for optimizing vineyard activities and improving yield and quality attributes. Remote sensing may be an effective and practical monitoring tool, as data from on-board satellite sensors can measure vegetative growth.
Helder Fraga, Malik Amraoui, Aureliano C. Malheiro, José Moutinho-Pereira, José Eiras-Dias, José Silvestre, João A. Santos   +6 more
openaire   +1 more source

Greenness and allergic rhinitis in children: the moderating and mediating effects of meteorological factors and air pollution

Frontiers in Climate
BackgroundEmerging evidence suggests that greenness may be beneficial to human health; however, the relationship between greenness exposure and childhood allergic rhinitis (AR) is inconsistent, and whether and how the link is moderated or mediated by ...
Yabin Hu, Yabin Hu, Guiyan Yang, Dan Wang, Wangyang Gu, Qingpeng Li, Linling Xu, Jingyi Tang, Jingyi Tang, Hui Wei, Shilu Tong, Shilu Tong, Zonghua Li, Shijian Liu   +13 more
doaj   +1 more source

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

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

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