|
« Return to Thread: San Fransisco average temp
Re: San Fransisco average temp
by Brillig
::
Rate this Message:
Mike,
I picked Alpine sort of at random for the area. A large section of
west Texas has similar weather patterns. I just looked up Marfa and
Van Horn which have similar patterns. Marfa's peak average high seems
to be on the cusp between May and June. That "lag" is so small it's
negative.
My more general point is that this feature you're trying to identify
-- the peak of hot weather during the year -- is not as consistent as
you're making it out to be. Good grief, San Francisco and Marfa are
so far apart you'd think they were in different hemispheres. Such is
not the case, obviously.
I think what you're seeing is patterns resulting from specific
topology. During the year, there is a band of tropical air that
hurricane watchers pay a lot of attention to called the Intertropical
Convergence Zone. The ITCZ moves north and south to the pulse of the
changing insolation patterns. Hurricane season results in part when
the ITCZ moves far enough north for a support system to be able to
nourish the developing storms across the Atlantic.
I don't want to get into hurricane development. My main point is that
this flow of the trade winds moves with the seasons. As the trade
winds encounter land, they attain chaotic circulation patterns. These
patterns result in anomalous temperature changes over the year from
location to location.
In short, trying to synchronize a calendar to worldwide temperatures
is an exercise in futility. Having a period of the right length is
adequate. Locals in various locales can then note specific points in
the calendar that is relevant to them. The Gregorian calendar already
accomplishes this quite nicely.
Victor
On Tue, Jun 30, 2009 at 6:38 PM, MIKE OSSIPOFF<nkklrp@...> wrote:
> Dear Irv and Calendrists,
>
> Thanks for the SF spreadsheet. I look forward to checking it out.
>
> Programming an automated calculation of the sine-wave parameters to achieve
> a match with a temperatures-table would be quite a task (which is why I
> haven't done it), with the system of nonlinear equations, but manually
> adjusting the parameters will get a match too.
>
> One other thing: Victor mentioned a Texas town, Alpine TX, with anomalous
> temperature-lag. In the record-books, Alpine likewise seems to have
> unusually short temperature lags. So Alpine would be a good town for which
> to make such a spreadsheet.
>
> Santa Cruz, too, has fog setting in during late summer, clearing up during
> September, giving a two-peaked summer. My Santa Cruz lag measurement was for
> winter, partly because of the summer fog, and partly because the middle of
> thermal winter seemed a worthwhile celebration day to determine.
>
> Mike Ossipoff
>
>
> org/>
> ________________________________
> Windows Live™: Keep your life in sync. Check it out.
I picked Alpine sort of at random for the area. A large section of
west Texas has similar weather patterns. I just looked up Marfa and
Van Horn which have similar patterns. Marfa's peak average high seems
to be on the cusp between May and June. That "lag" is so small it's
negative.
My more general point is that this feature you're trying to identify
-- the peak of hot weather during the year -- is not as consistent as
you're making it out to be. Good grief, San Francisco and Marfa are
so far apart you'd think they were in different hemispheres. Such is
not the case, obviously.
I think what you're seeing is patterns resulting from specific
topology. During the year, there is a band of tropical air that
hurricane watchers pay a lot of attention to called the Intertropical
Convergence Zone. The ITCZ moves north and south to the pulse of the
changing insolation patterns. Hurricane season results in part when
the ITCZ moves far enough north for a support system to be able to
nourish the developing storms across the Atlantic.
I don't want to get into hurricane development. My main point is that
this flow of the trade winds moves with the seasons. As the trade
winds encounter land, they attain chaotic circulation patterns. These
patterns result in anomalous temperature changes over the year from
location to location.
In short, trying to synchronize a calendar to worldwide temperatures
is an exercise in futility. Having a period of the right length is
adequate. Locals in various locales can then note specific points in
the calendar that is relevant to them. The Gregorian calendar already
accomplishes this quite nicely.
Victor
On Tue, Jun 30, 2009 at 6:38 PM, MIKE OSSIPOFF<nkklrp@...> wrote:
> Dear Irv and Calendrists,
>
> Thanks for the SF spreadsheet. I look forward to checking it out.
>
> Programming an automated calculation of the sine-wave parameters to achieve
> a match with a temperatures-table would be quite a task (which is why I
> haven't done it), with the system of nonlinear equations, but manually
> adjusting the parameters will get a match too.
>
> One other thing: Victor mentioned a Texas town, Alpine TX, with anomalous
> temperature-lag. In the record-books, Alpine likewise seems to have
> unusually short temperature lags. So Alpine would be a good town for which
> to make such a spreadsheet.
>
> Santa Cruz, too, has fog setting in during late summer, clearing up during
> September, giving a two-peaked summer. My Santa Cruz lag measurement was for
> winter, partly because of the summer fog, and partly because the middle of
> thermal winter seemed a worthwhile celebration day to determine.
>
> Mike Ossipoff
>
>
> org/>
> ________________________________
> Windows Live™: Keep your life in sync. Check it out.
« Return to Thread: San Fransisco average temp
| Free embeddable forum powered by Nabble | Forum Help |
