Re: OT: is the AGW bubble about to burst?

In article <pnvyi.6701$4w7.2638@xxxxxxxxxxxxxxxxxxxxxxxxxx>, JosephKK wrote:
Don Klipstein don@xxxxxxxxxxxxxx posted to sci.electronics.design:

Sunlight over 1 day at north pole during summer solstice: 1366
watts
per square meter, times sine of 23.45 degrees:

Wrong! The correct value is 66.55 degrees. It is the Artic circle
not the tropic circle.

OK, cosine of 66.55 degrees, same thing!

Just try seeing what my 543 watts per square meter during summer
solstice becomes if sine of 66.55 degrees was correct, rather than sine of
23.45 degrees (cosine of 66.55 degrees).

543 watts per square meter. Of course about half that gets
scattered by the atmosphere before reaching the surface.

Sunlight over 1 day at equator during equinox: 1366 watts per
square meter, times 2 over pi, times 12 hours over 24 hours:

Daily average of 435 watts per square meter. I suspect about 1/3
of that gets scattered by the atmosphere. I know that at high noon
only about 20% is scattered.

Meanwhile, Wiki has a map of average yearround insolation in a
color coded map, obviously including even effects of clouds.

The lowest insolation area in the arctic shown on that map is
east of Greenland and northwest of Scandanavia, and appears to me to
be color-coded to indicate for between 60 and 80 watts per square
meter. A small part of Greenland and a good size chunk of
Antarctica appears to me to be colo-coded for 120-140 watts per
square meter.

Gosh That is a LOT lower 1366 W / m^2 cited above.

Course it is, because that is after considering sun being up only half
the time, angle above horizon being less than 90 degrees and at least half
the time being below 45 degrees, in arctic/antarctic mostly being within
30 and always within 46.9 degrees of the horizon, atmospheric scattering,
and clouds.

The highest insolation areas in the tropics appear to me to be
color coded for 280-300 watts per square meter.

Not the least bit consistent are you.

280-300 watts per square meter annual average for most-sunbaked parts of
the Sahara Desert sounds to me about the same as my calculation for
equator during equinox (435 watts per square meter) would be after
reducing it by my estimated 1/3 for atmospheric scattering.

Since Sahara should get a little less yearround than equator gets on a
coudless equinox day and I expect Sahara is not quite 100.00% cloud-free,
I suspect I overestimated a little when estimating that 1/3 of the sun's
energy fails to get past the atmosphere on the way to sunlit equatorial
parts of the world.

- Don Klipstein (don@xxxxxxxxx)

.

Relevant Pages

  • Re: OT: is the AGW bubble about to burst?
    ... Don Klipstein don@xxxxxxxxxxxxxx posted to sci.electronics.design: ... So a day's worth of unclouded sunlight on the North Pole in ... 543 watts per square meter. ...
    (sci.electronics.design)
  • Re: OT: is the AGW bubble about to burst?
    ... So a day's worth of unclouded sunlight on the North Pole in late ... Sunlight over 1 day at north pole during summer solstice: 1366 watts ... 543 watts per square meter. ... scattered by the atmosphere before reaching the surface. ...
    (sci.electronics.design)
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