Re: Rain by Design

"Robert Grumbine" <bobg@xxxxxxxxx> wrote in message
news:11hhj6o6ee1gj28@xxxxxxxxxxxxxxxxxxxxx
> In article <1125692065.852943.298990@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
> <harunyahya2011@xxxxxxxxx> wrote:
> >
> >Rain by Design
> >HARUN YAHYA
>
> I'm ticked off right now, so will break habit and actually
> respond to a few of the things. There is much snippage, and
> anyone who thinks I might be chopping unfairly is invited to
> read the whole things.
>
....
> >This is not all about the "measures" of rain. For instance, in the
> >atmospheric layers where it starts to rain, the temperature may fall as
> >low as 400 C below zero. Despite this, rain drops never turn into ice
> >particles. (This would certainly mean a fatal threat to the living
> >things on the earth.) The reason is that the water in the atmosphere is
> >pure water. As is well-known, pure water hardly freezes even at very
> >low temperatures.
>
> Never been in a hail storm, nor seen graupel, nor freezing rain, nor ...
>
> 400 C below zero would be quite a trick, as that's far below absolute
> zero and impossible. Clouds get cold, but don't approach absolute
> zero. Within the atmosphere, liquid water droplets are seen more
> or less routinely down to -40 C. They are quite scarce below that.
> But rain initiation most of the time relies on ice crystals being
> present, whether by freezing some of those cold water droplets, or
> by blow off from cirrus clouds.
>
> --
> Robert Grumbine http://www.radix.net/~bobg/ Science faqs and amateur
activities notes and links.
> Sagredo (Galileo Galilei) "You present these recondite matters with too
much
> evidence and ease; this great facility makes them less appreciated than
they
> would be had they been presented in a more abstruse manner." Two New
Sciences

Just to back up the temperature limitation that Robert mentions:

>From LTL (Low Temperature Laboratory) in Finland:
(http://ltl.tkk.fi/Low-Temp-Record.html):

"The record-low temperature was reached in a piece of rhodium metal, which
was cooled to 100 pK, or 0.000 000 000 1 degrees above the absolute zero.
The absolute zero is the limit of all temperatures, -273.15... C, a
temperature one can never reach. However, at the Low Temperature Laboratory,
the researchers have for more than 20 years been reaching closer and closer.
The previous Low Temperature World Record of 280 pK was in fact set here in
1993."

It took them 9 years to prepare the results
(http://lib.tkk.fi/Diss/2000/isbn9512252147/ and Dissertation in Print ISBN
951-22-5208-2).... I'll hazard a guess that Mr/Mrs Yahya took less than 6
days.

It amazes me that aeroplanes dont fall out of the sky when they fly through
clouds... the fuel would freeze. :)

---
X102/Dscaper


.

Relevant Pages

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  • Re: Rain by Design
    ... >> atmospheric layers where it starts to rain, the temperature may fall as ... >> low as 400 C below zero. ... rain drops never turn into ice ...
    (uk.sci.weather)
  • Re: [WR] Romsey - freezing rain (technically)
    ... >I think that the definition for freezing rain, Nigel, is not that the air ... > or ground temperature is below zero, but rather that the liquid drops ... It is quite possible for the sub zero ...
    (uk.sci.weather)