Sentences with phrase «difference vegetation index»

Changes in vegetation, particularly a transition from grasses to shrubs, has been reported in the North American Arctic (Sturm et al., 2001) and elsewhere (Tape et al., 2006), and satellite imagery has indicated an increase in the Normalised Difference Vegetation Index (NDVI, a measure of photosynthetically active biomass) over much of the Arctic (Slayback et al., 2003).

The FORMA alerts system then detects pronounced changes in vegetation cover over time, as measured by the Normalized Difference Vegetation Index (NDVI), a measure of vegetation greenness.

The data is called the Normalized Difference Vegetation Index, and there are several teams analyzing this and they are all agreeing that they are picking up a steady increase in the greenness of the planet.

The images help to reveal notable changes in vegetation cover over time using an indicator that measures vegetation intensity called the Normalized Difference Vegetation Index (NDVI).

Matt Ridley recently pointed out that a NASA scientist has developed a «Normalized Difference Vegetation Index» that uses satellite data to «map global vegetation changes.»

The researchers found that the leaf area index decreased by 14.5 percent, the enhanced vegetation index decreased by 14.8 percent and the normalized difference vegetation index decreased by 8.9 percent over the study period.

Six Chinese scientists used remotely - sensed imaging data, including leaf area index (LAI), normalized difference vegetation index (NDVI), an enhanced vegetation index (EVI), gross primary production (GPP) and net primary production (NPP), coupled with other data (temperature, soil moisture, evapotranspiration, albedo and wind) over the period 2003 to 2014 to analyze the effects of a wind farm on summer vegetative growth in a region of northern China.

Around the same time, a NASA scientist named Compton Tucker found that he could map global vegetation changes by calculating a «Normalized Difference Vegetation Index» (NDVI) from the data produced by a satellite sensor.

Spatial and temporal patterns of greenness on the Yamal Peninsula, Russia: interactions of ecological and social factors affecting the Arctic normalized difference vegetation index

Mesopotamia: territorial transformations at the age of global war; Multiyear satellite multispectral analysis, normalised difference vegetation index.

Average spring (March to May) normalized difference vegetation index in response to the warmest 16 % of Arctic March temperatures between 1982 - 2013.

«The results showed that, during moisture deficit periods, green turf cover (GTC), normalized difference vegetation index (NDVI), and leaf relative water content (RWC) were most affected by substrate depth, moderately affected by irrigation regime, and, to a lesser extent, by substrate type,» the authors said.

In this project, published in the review Building and Environment, they have used Landsat 7 ETM + and Sentinel - 2 satellite images to obtain the normalised difference vegetation index (NDVI) and ground temperature.

The line reflects the Normalised Difference Vegetation Index (NDVI): the higher the value, the more vegetation is thriving in the area.

Change in Amazon greenness from 2000 to 2012, measured as Normalized Difference Vegetation Index (NDVI).

Recent regional scale analyses using satellite - based vegetation indices such as the Normalized Difference Vegetation Index have found extensive areas of dryland greening in areas of the Mediterranean, the Sahel, the Middle East and northern China, as well as greening trends in Mongolia and South America, according to the paper.

Compares LST, albedo, normalized differenced vegetation index (NDVI) and evapotranspiration (ET) between seven different land cover types