COSMIC RAYS ON THE RISE AS SOLAR MINIMUM APPROACHES

Meteorologist Paul Dorian, Vencore, Inc. vencoreweather.com

Reports:

A recent study published in the Aug. 19th issue of Journal of Geophysical Research: Space Physics supports the idea of an important connection between cosmic rays and clouds. According to spaceweather.com, a team of scientists from the Technical University of Denmark (DTU) and the Hebrew University of Jerusalem has linked sudden decreases in cosmic rays to changes in Earth’s cloud cover. These rapid decreases in the observed galactic cosmic ray intensity are known as “Forbush Decreases” and tend to take place following coronal mass ejections (CMEs) in periods of high solar activity. When the sun is active (i.e., solar storms, CMEs), the magnetic field of the plasma solar wind sweeps some of the galactic cosmic rays away from Earth. In periods of low solar activity, more cosmic rays bombard the earth. The term “Forbush Decrease” was named after the American physicist Scott E. Forbush, who studied cosmic rays in the 1930s and 1940s.

The research team led by Jacob Svensmark of DTU identified the strongest 26 “Forbush Decreases” between 1987 and 2007, and looked at ground-based and satellite records of cloud cover to see what happened. In a recent press release, their conclusions were summarized as follows: “[Strong “Forbush Decreases”] cause a reduction in cloud fraction of about 2 percent corresponding to roughly a billion tonnes of liquid water disappearing from the atmosphere.”

Full Report is Here.

CA_Cosmic Rays

I have been following the Spaceweather reports of Cosmic Ray Increases over California since the project started several years ago. They program has been expanded to three sites around the globe. It will be interesting to follow the results.

 

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About Russ Steele

Freelance writer and climate change blogger. Russ spent twenty years in the Air Force as a navigator specializing in electronics warfare and digital systems. After his service he was employed for sixteen years as concept developer for TRW, an aerospace and automotive company, and then was CEO of a non-profit Internet provider for 18 months. Russ's articles have appeared in Comstock's Business, Capitol Journal, Trailer Life, Monitoring Times, and Idaho Magazine.
This entry was posted in California, Cosmic Rays, Solar. Bookmark the permalink.

One Response to COSMIC RAYS ON THE RISE AS SOLAR MINIMUM APPROACHES

  1. DaveK says:

    “… corresponding to roughly a billion tonnes of liquid water disappearing from the atmosphere.”

    Ummm… no, the water doesn’t “disappear” from the atmosphere, it’s just that it doesn’t turn into visible clouds until it reaches a somewhat greater level of supersaturation.

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