Enhanced Vegetation Index:
The image shown is a 16-day composite of the Vegetation Index. Varying shades of green shows the concentration of green leaf vegetation. Darker green indicates higher concentration of green vegetation. Progressive greening can be observed during the growing season which indicates healthy and vigorous plant growth. Read more about EVI and about measuring vegetation here...
Vegetation Index Anomaly
The difference between average Vegetation Index for a particular month and the average over the last several years for the same month is called the Vegetation Index anomaly. The image shown is a 16-day composite of the Enhanced Vegetation Index Anomaly. Varying shades of green indicates above average green vegetation growth whereas varying shades of red indicates below average green vegetation. The anomalies are computed based on 2000-05 EVI averages.
Precipitation Anomaly
The difference between total precipitation for a particular month and the average over the last several years for the same month is called the Precipitation anomaly. The image shows the monthly precipitation anomaly for each NCDC Climate Division in the UMAC region. Varying shades of blue indicates above average precipitation while varying shades of brown indicates below average precipitation.
Palmer Z Index
The Palmer Z Index is a measure of departure from normal of moisture. It can respond to varying monthly precipitation, even during periods of drought. The image shows the monthly Palmer Z Index for each NCDC Climate Division in the UMAC region. The scale shown is used to classify drought and wet conditions. Read more here...
