From: "Ole D. Rughede" <ole.rughede@privat.dk>
Newsgroups: sci.physics.electromag,sci.physics.plasma
References: <40F2FC22.F4B0ACF@mchsi.com> <40f3429f$0$222$edfadb0f@dread11.news.tele.dk>
Subject: Re: cosmic rays flux - Ice ages correlation?
Date: Tue, 13 Jul 2004 04:18:35 +0200
Organization: TDC Totalloesninger



"Ole D. Rughede" <ole.rughede@privat.dk> skrev i en meddelelse
news:40f3429f$0$222$edfadb0f@dread11.news.tele.dk...
>
> "Sam Wormley" <swormley1@mchsi.com> skrev i en meddelelse
> news:40F2FC22.F4B0ACF@mchsi.com...
> > Ref: http://physicsweb.org/article/news/8/7/6
> >
> > Ice ages could be caused by changes in the flux of cosmic rays
> > hitting the Earth according to three physicists. Jasper Kirkby of
> > CERN, Augusto Mangini of the University of Heidelberg and Richard
> > Muller of the University of California at Berkeley suggest that the
> > cosmic rays exert their influence through their effect on clouds. By
> > challenging the established insolation theory of glacial cycles, the
> > physicists are sure to encounter opposition from the geophysics
> > community (arXiv.org/abs/physics/0407005).
> >
> > Kirkby and colleagues have presented new data on the cosmic-ray flux
> > as recorded in the beryllium-10 content of deep ocean sediments. They
> > say that the data suggests a link between the number of cosmic rays
> > arriving on Earth and the glacial cycles. Beryllium-10 is produced
> > when cosmic rays interact with particles in the Earth's atmosphere
> > and then falls to the ground, where it is stored in ice or ocean
> > sediments.
>
> Also Carbon-14 is generated by cosmic rays. C14 as well as Be10 may
> be measured through many kiloyears from deposits in the Greenland and
> Anarctic ice-cores, where also O18 is found indicating the temperature
> at the time shortly before of snowfall from the O18/O16 ratios.
> >
> > The possible links between cosmic rays and glacial cycles follows on
> > from previous work that linked cosmic rays to climate change. In 1997
> > Henrik Svensmark and Eigil Friss-Christensen of the Danish Space
> > Research Institute proposed that high fluxes of cosmic rays could
> > lead to more clouds and a cooler climate, and vice versa. The Danish
> > scientists proposed that changes in the strength of the solar wind --
> > the stream of charged particles that flows from the Sun -- could lead
> > to changes in the cosmic ray flux.
>
> Solar activity certainly has a shielding effect with respect of the influx
> of cosmic rays on Earth.
>
> Svensmark proposed and effect in cloud creation as result of an influx
> of cosmic rays, but one would expect the increasing avalanche effect of
> free particles in the lower atmosphere should rather cause precipitation.
> Ongoing experiments would show if any idea in Svensmark's hypothesis.
> Friis-Christensen, director of the institute, has for years proposed that
> fluctuations in global climate may be caused by variation in solar
activity.
> >
> > See: http://physicsweb.org/article/news/8/7/6
>
> I have found a rather precise correlation between variations in the rate
> of the Earth's intrinsic rotation and global temperature from the
> measurements of global climate made by the Danish Meteorological
> Institute. It therefore seems, that a conversion of kinetic energy into
> heat energy accumulated mostly in the oceans would cause 1) heating
> of the waters as measured, 2) a great contribution to the atmospheric
> content of CO2 previously dissolved in the ocean waters at lower
> temperatures, and 3) a relatively slow, but long-time effect of further
> global heating due to the great enthalpy of water, from where the
> heat energy can only escape to the atmosphere by convection at the
> surface of the oceans. The atmosphere, on the other hand, should
> relatively fast irradiate heat into outer space.
>
> As seen to me, the present global warming is most probably a
> natural geophysical phenomenon, which, of course, is enhanced by
> the extreme human global use of fossil energy in modern times.
>
> My hypothesis is that solar activity may randomly influence the
> rate of Earth's rotation, predominantly by interaction of electric
> currents and magnetic forces in the plasma of the solar wind with
> the Earth-magnetic field changing significantly the later decades.
> Such interaction would be completely random dependent on the
> random orientations of the plasma fields in the solar wind, and
> could be acting both to an acceleration as well as to the present
> deceleration of the rate of the Earth's intrinsic rotation.
>
> According to that idea, acceleration of the rotation should result
> in a cooling of the global climate as has been the case in multiples
> of ice-ages, not mentioning other catastrophic scenarios such as
> the impact of large meteors, vulcanism with a cooling effect from
> sulphoric acid thrown into the atmosphere, et c. Such minor
> accelerations will occur, but are quite unpredictable, and the
> atmospheric CO2 can only be brought back to the oceans by
> precipitation washing it out from the air, mostly in arctic regions.
>
> The problem should be thoroughly studied in geophysics, and
> it seems clear that the present human energy consumption cannot
> go on for ever, why political decisions have to be taken, especially
> in the so-called developed industrial countries of extreme private
> energy consumptions to tranportations and useless facilities. The
> problem seems secondly related to the extreme gain in the world's
> population with demands for food-production, welfare, and share
> in the "blessings" of modern western civilisation.
>
> As regards the outlet of so-called green house gasses, it seems
> necessary to re-evaluate the use and destruction af plastics, as
> opposed to more permanent materials such as metals and wood.
>
> Attempts to gain or secure global energy reources to the benefit of
> certain countries, at the cost of the rest of the world by aggressive
> geopolitics or warfare, will inevitably lead to aggressors' defeat!
>
> Ole D. Rughede
>
>




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