نتایج جستجو برای: enhanced vegetation index

تعداد نتایج: 771222  

Journal: :ecopersia 2015
davoud akhzari sahel haghighi

there are many reports of serious problems of dust storm events in the western parts of iran. based on many researches, iraq is one of the main sources of dust storms in western parts of iran. the radial basis function network (rbfn) model has been used to assess wind erosion hazard in iraq as a main source area of dust storms over several western cities of iran. the percentage of vegetation is...

2017

Submit Manuscript | http://medcraveonline.com Abbreviations: ET: Evapotranspiration; ETM: Enhanced Thematic Mapper; EVI: Enhanced Vegetation Index; FAO: The Food and Agriculture Organization of the United Nations; LAI: Leaf Area Index; MODIS: Moderate Resolution Imaging Spectroradiometer (it is attached to Terra a sun synchronous satellite); NDVI; Normalized Difference in Vegetation Index; SAVI...

Journal: :Remote Sensing 2015
Xiaojun She Lifu Zhang Yi Cen Taixia Wu Changping Huang Muhammad Hasan Ali Baig

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 to the seasonality of the various types of vegetation cover. The purpose of this study was to elucidate the effects of these variations on VIs...

2012
Farooq Ahmad

To enhance the vegetation signal in remotely sensed data and provide an approximate measure of live green vegetation, a number of spectral vegetation indices have been developed to estimate biophysical parameters of vegetation. The sensitivity of the normalized difference vegetation index (NDVI) to the soil background and atmospheric effects has generated an increasing interest in the developme...

Journal: :Remote Sensing 2017
Bijian Tang Donghai Wu Xiang Zhao Tao Zhou Wenqian Zhao Hong Wei

Wind farms (WFs) can affect the local climate, and local climate change may influence underlying vegetation. Some studies have shown that WFs affect certain aspects of the regional climate, such as temperature and rainfall. However, there is still no evidence to demonstrate whether WFs can affect local vegetation growth, a significant part of the overall assessment of WF effects. In this resear...

Journal: :Remote Sensing 2017
Xiaochen Zou Matti Mottus

Leaf inclination angle distribution is an important canopy structure characteristic which directly impacts the fraction of the intercepted solar radiation. Together with the leaf area index (LAI) it determines the structure and fractional cover of a homogeneous crop canopy. Unfortunately, this key canopy parameter has usually been ignored when applying common multispectral vegetation indices to...

1999
Alfredo Huete Chris Justice Wim van Leeuwen

One of the primary interests of the Earth Observing System (EOS) program is to study the role of terrestrial vegetation in large-scale global processes with the goal of understanding how the Earth functions as a system. This requires an understanding of the global distribution of vegetation types as well as their biophysical and structural properties and spatial/temporal variations. Vegetation ...

Journal: :Remote Sensing 2018
Boksoon Myoung Seung Hee Kim Son V. Nghiem Shenyue Jia Kristen Whitney Menas C. Kafatos

The goal of the research reported here is to assess the capability of satellite vegetation indices from the Moderate Resolution Imaging Spectroradiometer onboard both Terra and Aqua satellites, in order to replicate live fuel moisture content of Southern California chaparral ecosystems. We compared seasonal and interannual characteristics of in-situ live fuel moisture with satellite vegetation ...

Journal: :Remote Sensing 2010
Ignacio Melendez-Pastor Jose Navarro-Pedreño Magaly Koch Ignacio Gómez Encarni I. Hernández

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. This study quantitatively describes Enhanced Vegetation Index (EVI) temporal changes for Mediterranean land-covers from the perspective of vegetation phenology a...

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