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Hi All, Dec 23, 2014
Perhaps the astronomers can put a quantitative edge on this but, in =
qualitative terms, the discrepancy between apparent sun movement and =
clock movement is responsible for such apparent irregularities.
The excecutive summary would state that the clock moves ahead on =
mean time whereas the sun, being a jolly fellow, is not in the least =
mean.
If you examine the analemma you will see that from early Sept. to 20 =
Dec. the clock is behind the sun but starting about Nov 1, the clock =
begins to gain on the sun and continues to gain until early Feb. [By Dec =
20 the clock is ahead of the sun. ] Because day length, measured by the =
clock is of constant length this must mean that sun day length during =
this period, when the clock gains on the sun, is less than 24 clock =
hours in length.=20
This I think arises from our good fortune in the Northern Hemisphere =
that the earth is nearest the sun about Dec 20.
Yt, DW
----- Original Message -----=20
From: desolatechair=20
To: naturens=20
Sent: Tuesday, December 23, 2014 8:35 AM
Subject: Re: [NatureNS] why aren't the days getting longer
Andy
There is some rounding at play, but basically sunrise keeps getting =
later until around the 25th. The earliest sunset is around the 17th, =
and after the 21st it starts getting later but the incremental change is =
not enough to make up for what we continue to lose in the morning. =
Takes about a week after the solstice to start making a net gain.
Regards
Jamie
Sent from Samsung Mobile
-------- Original message --------
From: Andy Moir/Christine Callaghan=20
Date:12-23-2014 8:09 AM (GMT-04:00)=20
To: NatureNS=20
Subject: [NatureNS] why aren't the days getting longer=20
According to the environment canada weather page, we actually got 1=20
minute less sunlight today than yesterday. I understand about solar=20
noon (I think), so I'm not really expecting sunrise to be earlier each =
day...but the total hours of sunlight should be increasing, not=20
decreasing, after the solstice, I thought. What up with that? Is it=20
perhaps some rounding issue with the Environment Canada calculator? I =
get the same result (less sunlight time, when I go to the NOAA solar=20
Calculator)
Thanks.
Andy
(who's always dealing with the big issues in life)
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5577 / Virus Database: 4257/8792 - Release Date: =
12/23/14
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<BODY bgColor=3D#ffffff>
<DIV>Hi All, =20
=
=20
Dec 23, 2014</DIV>
<DIV> Perhaps the astronomers can put a =
quantitative edge=20
on this but, in qualitative terms, the discrepancy between apparent =
sun=20
movement and clock movement is responsible for such apparent=20
irregularities.</DIV>
<DIV> </DIV>
<DIV> The excecutive summary would state that the =
clock moves=20
ahead on mean time whereas the sun, being a jolly fellow, is not in the =
least=20
mean.</DIV>
<DIV> </DIV>
<DIV> If you examine the analemma you will see =
that from=20
early Sept. to 20 Dec. the clock is behind the sun but starting about =
Nov 1, the=20
clock begins to gain on the sun and continues to gain until early Feb. =
[By Dec=20
20 the clock is ahead of the sun. ] Because day length, measured by the =
clock is=20
of constant length this must mean that sun day length during =
this=20
period, when the clock gains on the sun, is less than 24 =
clock hours=20
in length. </DIV>
<DIV> </DIV>
<DIV> This I think arises from our good fortune in the =
Northern Hemisphere that the earth is nearest the sun about Dec =
20.</DIV>
<DIV> </DIV>
<DIV> Yt, DW</DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Ddesolatechair@gmail.com=20
href=3D"mailto:desolatechair@gmail.com">desolatechair</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, December 23, =
2014 8:35=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [NatureNS] why =
aren't the=20
days getting longer</DIV>
<DIV><BR></DIV>
<DIV>Andy</DIV>
<DIV><BR></DIV>
<DIV>There is some rounding at play, but basically sunrise keeps =
getting later=20
until around the 25th. The earliest sunset is around the 17th, =
and after=20
the 21st it starts getting later but the incremental change is not =
enough to=20
make up for what we continue to lose in the morning. Takes about =
a week=20
after the solstice to start making a net gain.</DIV>
<DIV><BR></DIV>
<DIV>Regards</DIV>
<DIV>Jamie</DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>
<DIV>
<DIV style=3D"COLOR: #575757; FONT-SIZE: 9px">Sent from Samsung=20
Mobile</DIV></DIV><BR><BR>
<DIV>-------- Original message --------</DIV>
<DIV>From: Andy Moir/Christine Callaghan <SLICKDOG1@GMAIL.COM></DIV>
<DIV>Date:12-23-2014 8:09 AM (GMT-04:00) </DIV>
<DIV>To: NatureNS <NATURENS@CHEBUCTO.NS.CA></DIV>
<DIV>Subject: [NatureNS] why aren't the days getting longer </DIV>
<DIV><BR></D