[ RadSafe ] USA Drought
jrpnj01 at gmail.com
Sat Aug 22 22:49:28 CDT 2015
Here is an email which revises my estimate of the recent drought
in California and elsewhere. 1932-1934 or so was the time period
about which the dustbowl (Midwestern USA) occured for a decade or so.
Real estimates of the length of that drought would be appreciated.
I suspect drought in the USA occurs at times at which the icecaps
are refreezing, and thus water becomes less available for rain at
The peaks in Earth polar motion amplitude (Chandler wobbles,
Annual wobble) occur in 1910, 1954, 1998, 2042???. 1932 is a time
between the 1910 and 1954 peaks --- drought occured then. The next
mid-point peak is 2020 --- midpoint of the current drought???? VLBI
data (NASA Goddard) can be used to find when the actual peaks are.
I originally thought the California drought would last 10 years,
but Caldrought has already gone on for 4 years. So, perhaps the
California drought will actully last for about 18 years. Conservation
is a must. (2020 +/- 9 years)???
I am not currently in a position to compute these numbers
better, but perhaps Richard Gross at JPL, Dickman at SUNY/Binghamton
or Chopo Ma at NASA Goddard could look at the VLBI data more
Regards, Joe Preisig
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