Re: 2900 BC vs. 2350 BC

Date: Wed May 01 2002 - 15:57:20 EDT

  • Next message: "Re: Black Sea Flood"

    I wrote: That date has recently been shown by dendrochronologists to be one
    in which the climate of the ancient Near East was, for some unexplained
    reason, greatly altered for a short period of time.

    Glen responded: Why must there be a 'cause' of a climate change? Weather is
    a nonlinear
      system which sometimes simple falls into attractor states which do bad or
    good things to areas normally used to having the opposite? There simply
    doesn't have to be a 'cause' be it meteor, or anything else.

    Everything has a cause, including all weather changes and all apparent
    climate cycles. However, as you point out, major changes in climate have
    occurred in the past that were apparently not the result of any "catastrophic
    cause." It is certainly possible that the major change in the climate of the
    ancient Near East, which studies of tree ring growth indicate took place in
    about 2350 BC, was caused by something far less catastrophic than a very
    large meteor impact. The fact is, weather changes can be brought about by
    very small causes. Meteorologists sometimes refer to "the butterfly effect"
    when they explain why it is impossible for them to always accurately predict
    the weather. They say a butterfly flapping its wings in Canada can start a
    change in air currents which can lead to a change of the weather a couple
    days later in Ohio.

    But the fact is, large effects almost always have large causes, though
    certainly not always catastrophic causes. Simply because there does not
    appear to have been a particular "cause" to a major change in an area's
    climate in the past does not mean that nothing caused that change. As I said,
    everything has a cause. Though again, I agree that major changes of climate
    can be brought about by something other than a catastrophic cause.

    One difference between the climate changes you referred to and the one
    revealed in the tree ring studies is their duration. Major changes in climate
    normally last for long periods of time. This change was apparently both quite
    large and quite brief, leading some to conclude it may have been caused by a
    cataclysm from which the area soon recovered.


    This archive was generated by hypermail 2b29 : Wed May 01 2002 - 16:02:59 EDT