Sentences with phrase «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).

Vegetation Index data collected by MODIS on NASA's Terra satellite demonstrates part of the seasonal cycle in the contiguous United States during the first half of 2001.

Additionally we compared the skill of chlorophyll fluorescence to commonly used vegetation index, fraction of photosynthetically active radiation that is more connected with the amount of green biomass than directly with photosynthesis.

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

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.

Both the vegetation index and chlorophyll concentration were calculated using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite.

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.

Additionally we compared the skill of chlorophyll fluorescence to commonly used vegetation index, fraction of photosynthetically active radiation that is more connected with the amount of green biomass than directly with photosynthesis.

The relationship between the following covariates and podoconiosis prevalence was explored: elevation and derived slope; long - term average of precipitation; enhanced vegetation index (EVI); clay and silt content of the top soil (0 — 15 cm), and night light - emissivity (see Supplementary File 1).

To clarify the impact of long - term drought on the Congo rainforest, Zhou and colleagues set out to see whether they could detect a trend in a satellite measure of vegetation greenness called the Enhanced Vegetation Index.

«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.

Kumar collects vegetation index, canopy temperature and images with geo - referenced measurements.

«The measure of vegetation index or «green - ness» is really the easiest and more straightforward way to measure the overall health status of the plant.»

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.

It uses satellite data from MODIS vegetation indices (MOD13Q1 and NDVI) and products related to presence of water bodies (MOD35) as well as Tropical Rainfall Measuring Mission (TRMM) precipitation data to detect anthropogenic changes in vegetation cover every 16 days.

Not exact matches

«We looked at the correlations between the Palmer Drought Severity Index - which summarizes moisture characteristics in soil and vegetation - and acres burned, or fire frequency.

Global map of the Vegetation Sensitivity Index (VSI), a new indicator of vegetation sensitivity to climate variability using satelVegetation Sensitivity Index (VSI), a new indicator of vegetation sensitivity to climate variability using satelvegetation sensitivity to climate variability using satellite data.

The metric they have developed, the Vegetation Sensitivity Index (VSI), allows a more quantifiable response to climate change challenges and how sensitive different ecosystems are to short - term climate anomalies; e.g. a warmer June than on average, a cold December, a cloudy September, etc..

«If there's high variability in temperature, and low variability in vegetation, you're scoring low on the sensitivity index,» says Seddon.

This approach allowed the researchers to identify Earth ecosystems that responded quite sensitively to changes in climate parameters, as opposed to those that did not — deriving a «vegetation sensitivity index» across the planet.

Analysis of leaf area index and fraction of PAR absorbed by vegetation products from the Terra MODIS sensor: 2000 - 2005.

They identified climate drivers of vegetation productivity on monthly timescales and computed the sensitivity index.

Soil water variations in the Northern US are more tightly coupled with vegetation variability than in the Southern US / Mexico index region.

The index then compares these variables with the productivity of vegetation under changing climate on a global scale.

Current climate conditions trends and averages: Land - Floods; drought; fire; vegetation health index, soil moisture content, snow cover, northern hemisphere snow extent

This animation shows monthly composites of vegetation health index derived from data from the AVHRR sensor on - board the NOAA POES satellite.