Sentences with phrase «of vegetation greenness»

Satellite measures of vegetation greenness, together with animal stocking data and key climatic factors, reveal interannual precipitation variability to be a significant constraint on global pasture productivity.

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.

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.

Previous research used satellite - based measurements of vegetation greenness to investigate changes in the Amazon rainforest, notably the effects of severe short - term droughts in 2005 and 2010.

Not exact matches

Data from the Visible - Infrared Imager / Radiometer Suite (VIIRS) instrument on board the NASA / NOAA Suomi NPP satellite is able to detect these subtle differences in greenness, and is sending extraordinary images back to Earth giving us a clearer picture of vegetation around the world.

For example, in years that had more than average burning during the dry season, measurements of soil moisture, evaporation and vegetation greenness — all of which help to trigger rain — decreased in the following wet season.

To do so, Ichoku and his colleagues used satellite records from 2001 to 2014 — including data from NASA's Moderate Resolution Imaging Spectroradiometer and the Tropical Rainfall Measurement Mission — to analyze the impact of fires on various water cycle indicators, namely soil moisture, precipitation, evapotranspiration and vegetation greenness.

Greening of arctic Alaska, 1981 - 2001 http://www.agu.org/pubs/crossref/2003/2003GL018268.shtml «Here we analyzed a time series of 21 - yr satellite data for three bioclimate subzones in northern Alaska and confirmed a long - term trend of increase in vegetation greenness for the Alaskan tundra that has been detected globally for the northern latitudes.»

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

Widespread decline in greenness of Amazonian vegetation due to the 2010 drought.

The images were taken at weekly intervals, from 2002 to 2007, of the wheat - growing seasons to measure the «vegetation greenness» − an indicator of crop yield.

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.

Close to a million square km of vegetation showed reduced levels of greenness - four times the 2005 dry - out area.

Analysis of satellite - sensed vegetation greenness and meteorological station data suggest an enhanced plant growth and lengthened growing season duration at northern high latitudes since the 1980s (Zhou et al., 2001, 2003c).

-LSB-...] With satellites, they have collected regional and global measurements of the «greenness» of the land surface and assessed the presence or absence of vegetation, while looking for signals to distinguish trees from shrubs from ground cover.