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Once in a decade - 10.13.06


The rhythmic repeat of climate events is known to science as a decadal influence. Doc Weather takes a look at this familiar concept from a cosmic viewpoint.

Once a decade, a rhythm unfolds that has great significance for the weather patterns on earth. More precisely we could say that once a decade a rhythmic pattern unfolds in a particular place on earth that has great significance for weather forecasts. Climatologists have long recognized this pattern of ten-year rhythms known as the decadal influence. It is generally not known what the source of decadal influences is but that it exists is pretty certain. A decadal influence is any weather pattern that tends to repeat itself in a given place in a rhythm of ten years more or less.

El Nino and La Nina patterns are often linked by ten- year cycles. Drought and flood patterns for specific places tend to recur in decadal rhythms or even double decadal or inter decadal rhythms. The famous solar cycle is a more or less, twenty-year, cyclic rhythm of the Sun that influences many other patterns in nature. The question still could be, with all of these indications of ten-year rhythms what is the driving force for the pattern?


Fig.1


Fig.1

The chart shows the motion of the eclipse points from February 1989 to January 1991. The gray shaded bars alternate with red shaded bars to help differentiate the sections. The brackets represent the positions of the two eclipse points during the designated times. The shaded bars are the observed zones of influence of the eclipse points. The chart shows how the sets of points moving from east to west across the continent were coincident with unusual weather events in the zones of influence at that time. The circles represent the areas in which the unusual weather events took place. Black circles are linked to gray bars and purple circles are linked to red bars.

Starting in Feb 89 the eclipse zone is across New England (gray bar / black circle). Severe spring floods hit this area at this time. In Aug 89 the zone crosses the Carolinas and mid Atlantic States (red bar / purple circle). The circle depicts the devastating landfall of Hurricane Hugo during the fall of that year. The February 90 zone (gray bar / black circle) parallels the Mississippi delta, the site of severe winter floods at that time. The Aug 90 zone (red bar / purple circle) runs up into Colorado, the site of a remarkably cold and wet summer during that season. The Jan 91 zone (gray bar / black circle) runs into the desert Southwest of the United States. During that period strong and unusual disturbing energies filled the Great Basin.

The actual influences from the eclipse points are much more complex than can be illustrated with these simple means. The purpose of this short article is so illustrate the idea that the motion of unusual weather events can be tracked by the motions of the two eclipse points taken together. The orbital motion of the two points has them moving through half of the zodiac in a 9.3 year rhythm. That rhythm is very close to the climate standard of decadal influence.