![]() |
(OT) Thick Layer Of Magma Found Under American Southwest.
On Jun 30, 8:44 pm, m II wrote:
HFguy wrote: Not sure who's distance theories you're referring to but I was replying to the first poster's quote (above) about the distance of the sun from the earth during the (northern) summer and winter, which as you acknowledge, has nothing to do with the cause of the seasons. I misunderstood the statement that "It only applies to the Northern Hemisphere". The brain kept telling me that the whole planet is closer to the Sun in winter, not just the Northern half. The distance the planet is closer is far greater than the amount given by the precession. My fault..please accept my humble apologies. In fact the southern summer and winter tend to be more extreme because the earth happens to be closest and farthest from the sun respectively, during those seasons in the southern hemisphere. We happen to live in an era where this is the case. As the earth's axis precesses over a period of 26-thousand years, the seasons of the year when perihelion and aphelion occur in each hemisphere slowly shifts. In about 13-thousand years from now the situation will be reversed for each hemisphere. I'll have to verify that...must leave note...Where is my acid free papyrus..... mike Mike - Two Things Distance -and- Angle of Incidence add up to the impact {Thermo-Load} that the Sun has on any part of the Earth at any time of the Year. ~ RHF |
(OT) Thick Layer Of Magma Found Under American Southwest.
On Jun 30, 10:14 pm, Telamon
wrote: In article L7rhi.182$105.176@trndny08, HFguy wrote: Brenda Ann wrote: "HFguy" wrote in message news:uv1hi.10571$9b5.1632@trndny05... Earth is closer to the Sun in Winter and further away from the Sun in Summer. This is true only for the northern hemisphere and it's not what causes the seasons. The Earth reaches perihelion - the point in its orbit closest to the Sun - in early January, only about two weeks after the December solstice. Thus winter begins in the northern hemisphere at about the time that the Earth is nearest the Sun. Is this important? Is there a reason why the times of solstice and perihelion are so close? It turns out that the proximity of the two dates is a coincidence of the particular century we live in. The date of perihelion does not remain fixed, but, over very long periods of time, slowly regresses (moves later) within the year. There is some evidence that this long-term change in the date of perihelion influences the Earth's climate. That's called the orbital forcing theory of climate change. http://en.wikipedia.org/wiki/Orbital_forcing - The only question left is when will we reach the aphelion - of the hyperbole regarding global warming. - - -- - Telamon - Ventura, California Telamon - Super Gluing Al Gore's Lips Shut should get you there abouts -pdq- ~ RHF |
(OT) Thick Layer Of Magma Found Under American Southwest.
It's sort of like if you get a basketball and draw a line around the
middle of the basketball and call that line the Equator and shine a flahlight at that line.Tilt the top of the basketball a little more toward the light and that is Summer in America and it is Winter in Australia.Tilt the top of the ball a little away from the light and it is Winter in America and Summer in Australia.Mostly, the direct and indirect light from the Sun makes the difference.It is Summertime in America now and we are gradually heading toward Fall and on into Winter.The hours of daylight are gradually getting shorter. cuhulin |
(OT) Thick Layer Of Magma Found Under American Southwest.
RHF wrote:
Mike - Two Things Distance -and- Angle of Incidence add up to the impact {Thermo-Load} that the Sun has on any part of the Earth at any time of the Year. ~ RHF I have a feeling that the Angle the light hits the surface at has a far greater effect than a few piddly little million kilometers. The angle of planet tilt added to the angle of the surface where you live can drastically lower the quantity of energy hitting the surface in the winter. cosine(23 degrees tilt plus 50 degrees(where I live)) X available energy = about a third of what's available. I'm not good with spherical math, but I'm guessing that distance would vary the energy per square unit in some ratio to a cube power...that percent reduction would be multiplied by whatever the angle cosine gives us. I have to go get a sweater now... mike |
(OT) Thick Layer Of Magma Found Under American Southwest.
On Jul 1, 11:02 am, m II wrote:
RHF wrote: Mike - Two Things Distance -and- Angle of Incidence add up to the impact {Thermo-Load} that the Sun has on any part of the Earth at any time of the Year. ~ RHF I have a feeling that the Angle the light hits the surface at has a far greater effect than a few piddly little million kilometers. The angle of planet tilt added to the angle of the surface where you live can drastically lower the quantity of energy hitting the surface in the winter. cosine(23 degrees tilt plus 50 degrees(where I live)) X available energy = about a third of what's available. I'm not good with spherical math, but I'm guessing that distance would vary the energy per square unit in some ratio to a cube power...that percent reduction would be multiplied by whatever the angle cosine gives us. I have to go get a sweater now... mike Mike - Sounds {Reads} about right to me. ~ RHF How Critical is the Earth-Sun Distance in maintaining our Average Temperatures on Earth ? http://curious.astro.cornell.edu/que...php?number=331 |
(OT) Thick Layer Of Magma Found Under American Southwest.
m II wrote:
I have a feeling that the Angle the light hits the surface at has a far greater effect than a few piddly little million kilometers. Your intuition is correct regarding the sun angle on the surface having the greatest influence on the seasonal changes, but it's not clear if the distance factor plays a role in long term climate changes. This is related to the orbital forcing theory previously mentioned. The sun produces about 1-KW/meter^2 above the earth's atmosphere. How much of that energy is available on the ground depends mainly on the angle of incidence, assuming it's a clear day. |
(OT) Thick Layer Of Magma Found Under American Southwest.
Earth Sun distance is Very critical.Do you want Springtime all year
around? Move to Costa Rica. cuhulin |
(OT) : For the 'little people' "Low Cost" Carbon Credits Are Now Available on . . . You Got It eBay !
On Jul 7, 11:29 pm, m II wrote:
RHF wrote: this could be a real growth industry in the 'usa' for made-in-america cars and trucks who were the king of gas guzzlers in the pre-1980s - - - but don't hold your breath . . . ~ RHF - The entire carbon credit scam was developed in order - to allow continued and increased emissions by the - guilty parties. - - It's not even a band aid solution..more like smoke and - mirrors...very dirty mirrors. - - dxAce will be by momentarily to tell us that clean air - is Anti American. - - mike Mike (M II) - If I were to believe you then : 1 - The Kyoto Protocol would be a Scam http://en.wikipedia.org/wiki/Kyoto_Protocol 2 - Al Gore would be a Scam Artist http://en.wikipedia.org/wiki/Al_gore - - - say it isn't so ~ RHF |
(OT) : For the 'little people' "Low Cost" Carbon Credits AreNo...
|
(OT) : For the 'little people' "LowCost" Carbon Credits Are N...
I am Lucky I am not Canadian and I am Lucky I don't live in Canada.
About half an hour ago, doggy took me out in the front yard.I heard them wimmins talking next door to me.Natcherly, doggy and I headed on over there.Skinny twin sister went into her house and she came back out.She handed me a paper plate with sheskabob and potato salad.Of course I always save some for doggy.There is a new woman over there.She is from Houston,Texas.She is tall (she is tall, she is tall) with lonnnng golden hair. cuhulin |
All times are GMT +1. The time now is 01:53 AM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com