Results 251 to 260 of about 550,601 (290)

MODIS Vegetative Cover Conversion and Vegetation Continuous Fields

2010
Land cover change occurs at various spatial and temporal scales. For example, large-scale mechanical removal of forests for agro-industrial activities contrasts with the small-scale clearing of subsistence farmers. Such dynamics vary in spatial extent and rate of land conversion.
Mark Carroll, John Townshend, Matthew Hansen, Charlene DiMiceli, Robert Sohlberg, Karl Wurster   +5 more
openaire   +1 more source

Transformed difference vegetation index (TDVI) for vegetation cover mapping

IEEE International Geoscience and Remote Sensing Symposium, 2003
In this study, we present a new vegetation index, the TDVI: transformed difference vegetation index. This index shows the same sensitivity as the soil adjusted vegetation index (SAVI) to the optical proprieties of bare soil subjacent to the cover. It does not saturate like NDVI and SAVI and it shows an excellent linearity as a function of the rate of ...
A. Bannari, H. Asalhi, P.M. Teillet
openaire   +1 more source

INCORPORATING DYNAMIC VEGETATION COVER WITHIN GLOBAL CLIMATE MODELS

Ecological Applications, 2000
Numerical models of Earth's climate system must consider the atmosphere and terrestrial biosphere as a coupled system, with biogeophysical and biogeochemical processes occurring across a range of timescales. On short timescales (i.e., seconds to hours), the coupled system is dominated by the rapid biophysical and biogeochemical processes that exchange ...
Foley, Jonathan, Levis, Samuel, Costa, Marcos Heil, Cramer, Wolfgang, Pollard, David   +4 more
openaire   +2 more sources

Fractional Vegetation Cover

2019
Fractional vegetation cover (FVC) is an important parameter in the study of ecosystem balance, soil erosion, and climate change and is often used to evaluate and monitor vegetation degradation and desertification. Remote sensing provides the only feasible way to estimate FVC at regional and global scales. In the present study, an empirical model of FVC
openaire   +1 more source

Fractional vegetation cover estimation by using multi-angle vegetation index

Remote Sensing of Environment, 2018
Abstract The vegetation index-based (VI-based) mixture model is widely used to derive green fractional vegetation cover (FVC) from remotely sensed data. Two critical parameters of the model are the vegetation index values of fully-vegetated and bare soil pixels (denoted Vx and Vn hereafter). These are commonly empirically set according to spatial and/
Xihan Mu, Wanjuan Song, Zhan Gao, Tim R. McVicar, Randall J. Donohue, Guangjian Yan   +5 more
openaire   +1 more source

Vegetative Covers for Waste Containment

2003
Disposal of municipal and hazardous waste in the United States is primarily accomplished by containment in lined and capped landfills. Evapotranspiration cover systems offer an alternative to conventional landfill cap systems. These covers work on completely different principles than traditional covers do, and that difference may slow understanding and
openaire   +2 more sources

The reliability of vegetation indices for monitoring saltmarsh vegetation cover

International Journal of Remote Sensing, 1997
The dynamic nature of saltmarshes poses a challenge for coastal zone monitoring; natural variability in the sediment reflectance and atmospheric visibility within saltmarsh environment affects the reliability of regression relations between vegetation cover and vegetation indices.
J. A. Eastwood, M. G. Yates, A. G. Thomson, R. M. Fuller   +3 more
openaire   +1 more source

Vegetation Cover Monitoring

2003
The plant cover of the Nizhne-Koshelevsky hydrothermal field area (Southern Kamchatka) was studied 20 years after being damaged by prospecting and exploratory drilling. Siberian dwarf-pine and dwarf-alder elfin woods were replaced by secondary herb- and grass communities.
openaire   +1 more source

Full polarimetric emissivity of vegetation-covered soils: vegetation structure effects

IEEE International Geoscience and Remote Sensing Symposium, 2003
In May 1999 the SMOS Earth Explorer Opportunity mission was selected by ESA to provide global soil moisture and sea salinity maps using the MIRAS L-band aperture synthesis interferometric radiometer. At this frequency there is a high dynamic range of the soil moisture signature and surface roughness effects are small, as well as vegetation effects ...
A. Martinez-Vazquez, A. Camps, N. Duffo, M. Vall-Ilossera, J.M. Lopez-Sanchez   +4 more
openaire   +1 more source

Vegetation Cover of Porphyry Outcrops

1996
The plant cover of the porphyry landscape northwest of Halle forms a mosaic of strongly contrasting vegetation units. These are characterized by a high species diversity and the presence of a high number of species rare for this region. Reasons for the high species number and diversity are site dependant changes in edaphic and microclimatic factors ...
E. G. Mahn, M. Partzsch
openaire   +1 more source