|+1.0 and above AAM||+0.5 and above AAM||0 and above AAM||0 and below AAM||-0.5 and below AAM||-1.0 and below AAM|
Above is 500mb Geopotential Height Composite according to GLAAM categories.
The GLAAM refers to the winds of the planet being weaker (less westerly than normal) in terms of a low or negative AAM, and the winds of the planet being stronger (more westerly than normal) in terms of a high or positive AAM. In general, the jetstreams of both hemispheres are more poleward and contracted in a low AAM, and more equatorward and expanded in a high AAM.
These composites serve to demonstrate the effects of the AAM on weather in specific regions, and inter-seasonal effects that the GSDM (Global Synoptic-Dynamical Model) has on the Earth’s Atmosphere.
This goes to a page with links to measure current and future developments of the AAM and related processes.
The above 72 graphics are courtesy of NOAA ERSL PSD. Reference below:
“Image provided by the NOAA/ESRL Physical Sciences Division, Boulder Colorado from their Web site at http://www.esrl.noaa.gov/psd/”.
All uses of the data gained from this exact webpage are permitted, attribution to this webpage is highly appreciated. Report errors and suggestions to my contact page.