On Sat, 14 Dec 2019 16:49:20 +0000, The Natural Philosopher wrote:

> On 14/12/2019 14:50, Martin Gregorie wrote:
> There have been three periods warmer than today since the last ice age -
> the Holocene optimum, the Roman warm period and the mediaeval warm
> period.
>
I think you'll find that the Roman and Mediaeval warm periods are local
to Europe and the Mediterranean. I specifically said 'global averages' to
exclude local effects.

>>   This*should*  be expected to
>> raise rainfall because of increased evaporation from seas, lakes and
>> especially [*] transpiration from trees combine with warmer air being
>> able to contain more water vapour.
>>
>>
> No, Climate change is reposnible for drought, snow in the sahara, floods
> in the sahara, more ice in antaractica, ice melting in antarctica.
>
And its reverse, of course.

Its interesting that you're ignoring well-established physical science
now. The variation of water vapour concentration in the atmosphere with
temperature has been known since the days of Newton and Charles.

The impact of arboreal transpiration on atmospheric humidity has only
been quantified recently: it turns out the water transport by moist winds
over the Amazon is considerably greater than the flow in its rivers. It
reasonable to expect the same effect to operate over temporal and boreal
forests, but the size of the flow will, of course, vary with
transpiration rates from the tree varieties in those forests and the
temperature of the air they are living in and under.

> In fact there is nothing bad that climatete change is not resposble for.
>
So you think that climate change IS responsible for eveything bad!
Careful with that Negation, Eugene!


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Martin    | martin at
Gregorie  | gregorie dot org

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