# Perplexing question regarding the relationship temperature of the Earth in orbit arou

bolbol2054

We know that the earth revolves around the sun in an oval orbit the sun occupies one of its centers
On this basis, the distance from the sun is not constant and the land closest to the sun in Maicon on Jan. 3 and and be further from the sun on July 4, the difference between the two points approximately 5 million km
If speculate that the factors that govern the temperature of the earth's surface is
1 - The amount of distance from the Sun{ it is well known that the planets furthest from the sun is in the cooler temperatures}
2 - angle of the sun's rays fall on the ground

What are the physical laws that govern this issue and make it as unexpected to mind is that jan more cooler and july more hotter

onomatomanic

Simply put, the "ovalness" (ellipticity, really) of Earth's orbit is rather small, while Earth's axial tilt is rather large. Hence, the seasons are primarily driven by effect 2, and effect 1 is only one among several small secondary considerations. http://cseligman.com/text/planets/orbiteffect.htm" [Broken] is one of the few I could find that attempts to roughly quantify the respective contributions.

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bolbol2054

Simply put, the "ovalness" (ellipticity, really) of Earth's orbit is rather small, while Earth's axial tilt is rather large. Hence, the seasons are primarily driven by effect 2, and effect 1 is only one among several small secondary considerations. http://cseligman.com/text/planets/orbiteffect.htm" [Broken] is one of the few I could find that attempts to roughly quantify the respective contributions.

thank you sir very much i have realy benfited of your guiding informations

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Gold Member

BTW, note that January being cooler and July being hotter is entirely northern-hemispherocentric.

If you live south of the equator, you'll be wearing shorts at New Years and a parka on Firecracker Day.

Mentor

....Firecracker Day.
I've never heard of that - is that an Australian holiday? :tongue2:

And btw, the difference is less than 5 million miles. Aphelion is 94.5 and perihelion is 91.4 million miles.

Gold Member

I've never heard of that - is that an Australian holiday? :tongue2:

Ha ha no. Just that, up here in the GWN, July 4 doesn't pull the heartstrings the way it does for y'all.

bolbol2054

thank you mr dave and mr russ
i have understood from the link that the water-land distriputions between north and south earth hemispheres make the earth as awhole cooler in jan and hotter in jul