The jet stream and the Earth's rotation

Orion402 · 02-03-2022 7:51am

On the December Solstice, the North Pole was at its maximum distance to the light hemisphere of the Earth, thereby creating the largest circumference where the Sun was out of sight and also known as the Arctic circle. Ever since, that circumference has been shrinking, slowly at first and then rapidly as it is at present, so we experience this at our latitudes as a rapid return of daylight lengths as we share in the same rotation. The reason the circumference is shrinking is because the North pole is approaching the light hemisphere of the Earth and will soon see the one and only sunrise this year on the March Equinox just as the South pole will see that event in September as it crosses through the light hemisphere and into the dark hemisphere of the Earth-

https://en.wikipedia.org/wiki/Deep_Space_Climate_Observatory#/media/File:EpicEarth-Globespin-tilt-23.4.gif

If an image was taken from the same position presently, the orientation would be from southwest to northeast relative to the orbital plane whereas in September it is from northwest to southeast. It is here that modelling becomes useful for interpretation as some contributors talented with graphic modelling would be able to represent the changing orientation as it is seen from the orbital plane. It is difficult insofar as while the annual motion of the North/South poles is evident, daily rotation swamps that surface orbital seen at the North/South poles which extends to the entire surface of the Earth. About 50 seconds into the time lapse of Uranus (where the dark hemisphere of that planet remains out of view), it is possible to see that surface rotation of the entire planet as a means to apply the same feature to the Earth.

The annual changes in orientation based on two surface rotations acting in combination influences weather as the changes are oceanic, atmospheric and land surface temperatures-

https://www.youtube.com/watch?v=xvbV9llG5L8

Modelling short term weather conclusions is welcome as the changes across a week are minimal and allow contributors to gauge what weather will emerge, however, the next step isn't modelling conclusions for the seasons, but rather modelling observations to suit interpretation of our planet, its motions and why we have the climate we do in comparison to other planets. If people feel the need for dramatic conclusions, then modelling the Earth's climate using changes in inclination to the orbital plane will give them amazing changes in conditions, even if they are hypothetical in nature.

Gaoth Laidir · 02-03-2022 8:40am

The only one drawing dramatic conclusions is you. Every one of us already knows all what you"ve said above (for the umpteenth time) so why do you keep repeating it as if its new knowledge? What's wrong with you?

Orion402 · 02-03-2022 9:42am

https://www.boards.ie/discussion/comment/118717854#Comment_118717854

Of course it is a dramatic conclusion, but nothing to do with dire predictions which belong to 'yesterday's men'.

Modelling for the purpose of interpretation takes the manufactured hysteria out of the Earth science of climate and turns it back into the gorgeous topic it actually is while preserving short term weather modelling and predictions which occupy most of the contributors to this forum. When the weather out in the Atlantic is quiet and not much is happening with the geographical components of climate, contributors can turn their attention to planetary climate what gives us our specific climate that makes life possible across most latitudes.

So, you or someone else would better spend your time improving on the analogy I presented yesterday rather than trying to bait me into reactions which I have no interest in. The dramatic conclusion here is that when daily rotation and all its effects are subtracted, the entire surface of the Earth still turns once each year to the orbital plane as a function of the orbital motion of the Earth. The trick is extending what happens at the North/South poles, where daily rotation is absent, to the entire surface of the planet. It will be a group venture rather than an individual trying to convince people they are wrong as contemporary imaging and especially from satellites is just too good to miss the opportunity of explaining observations using modelling for a better understanding of the planet.

Gaoth Laidir · 02-03-2022 10:10am

Quantum Erasure · 02-03-2022 12:16pm

https://www.boards.ie/discussion/comment/118717991#Comment_118717991

The dramatic conclusion here is that when daily rotation and all its effects are subtracted, the entire surface of the Earth still turns once each year to the orbital plane as a function of the orbital motion of the Earth

Has the earth turned on its axis, or just spun once in relation to the central sun, but all the time 'facing towards' the north star, as in your analogy above?

Orion402 · 02-03-2022 2:40pm

https://www.boards.ie/discussion/comment/118718781#Comment_118718781

Yes, the analogy, crude as it is, represents the single rotation of the planet over the course of a year. See what you can do with it even if it is tricky at the beginning and, if possible, move the issue forward using what talents you have.

Although daily rotation swamps the orbital one visually apart from the North/South poles, the expanding and decreasing circles with the North/South poles at their centre tend to highlight the separate rotation as a function of the orbital motion of the Earth. In this respect, the constant orientation of the Earth to Polaris has more value for the orbital motion of the Earth to prevent observers from 'tilting' the planet.

Copernicus originally got the motion of the North poles in an annual circle right but sacrificed it due to the prevalent Ptolemaic framework in his time-

" The third is the motion in declination. For, the axis of the daily rotation is not parallel to the Grand Orb's axis, but is inclined [to it at an angle that intercepts] a portion of a circumference, in our time about 23 1/2°. Therefore, while the earth's centre always remains in the plane of the ecliptic, that is, in the circumference of a circle of the Grand Orb, the earth's poles rotate, both of them describing small circles about centres [lying on a line that moves] parallel to the Grand Orb's axis. " Copernicus

http://copernicus.torun.pl/en/archives/astronomical/1/?view=transkrypcja&

When Copernicus talks about the Earth's centre remaining in the plane of the ecliptic, it extends to a separate Equator where the North/South poles are surface points that turn parallel to the Earth's orbital plane. The polar latitudes simply act as beacons for a separate rotation and therefore separate orbital North/South poles and an orbital Equator with reducing speeds from equator to poles just like daily rotation.

The issue is hard enough to explain without opposition from those who are modelling for predictions only but I truly believe there are contributors here well able to work with fluid dynamics for interpretative purposes only. In a world where there is a lot of anxiety, this topic shouldn't draw reactions the way it does..

Gaoth Laidir · 02-03-2022 6:03pm

An famous old quote from the world of meteorology:

“Consider a rotating spherical envelope of a mixture of gases, occasionally murky and always somewhat viscous. Place it around an astronomical object nearly 8000 miles in diameter. Tilt the whole system back and forth with respect to its source of heat and light. Freeze it at the poles of its axis of rotation and intensely heat it in the middle. Cover most of the surface of the sphere with a liquid that continually feeds moisture into the atmosphere. Subject the whole to tidal forces induced by the sun and a captive satellite. Then try to predict the conditions of one small portion of that atmosphere for a period of one to several days in advance.”

Author Unknown

Orion402 · 02-03-2022 8:43pm

Sometimes a few additional clues provide those who have come to understand that a tilting Earth is not the answer to the seasons insofar as any change in orientation due to a perceived variation in tilt would register in the change in orientation to the background stars while that orientation remains constant throughout an orbital circuit. To save the appearances, an old solar system research term, the answer is to apply two surface rotations to the Earth with daily rotation clearly visible while the surface rotation due to the way the Earth orbits the Sun is really only discernible in isolation at the North/South poles.

That would represent the orientation of the Earth on the December Solstice with the Sun to the left.

The Earth's centre coincident with the orbital plane is denoted by the arrow Z passing from the Tropic of Capricorn through the centre of the Earth and passing on to the Tropic of Cancer. On the June Solstice, the arrow Z passes from the Tropic of Cancer through the centre of the Earth on on to the Tropic of Capricorn. The North/South poles turn parallel to this (orbital) Equator as these are the only locations on the surface with a net zero rotational velocity as a function of daily rotation.

A more simplified diagram is possibly more productive in some ways without the temperature inputs-

The North Pole turns in a circle around the broken line over the course of an orbit as a function of the orbital motion of the Earth. The diagram above represents the Earth on the December Solstice as the daily rotational Equator is below the Earth's orbital plane on the side furthest from solar radiation.

Whether this helps or not I do know, but there are a lot of modifications needed to move away from the idea of a tilting Earth for seasonal weather or, in the other direction, to define planetary climate correctly.

Orion402 · 04-03-2022 9:38am

I am sure that younger people who wish to move away from the idea of tilting hemispheres to explain the seasons and replace it with two separate rotations acting in combination will notice that their challenges are not just the technical details alone but aggressive opposition as well. I can offer them nothing but difficult challenges where every trick in the book is thrown at them with all the baiting, reactions and facile insults involved. The effort here is denying those engaged in dire predictions any meaningful ground to operate in and concentrate on what is in front of observers as experiences using all their interpretative faculties helped by genuine modelling.

Short term weather modelling does not shade off into planetary climate so, using the daily and annual dynamical traits of the Earth, it is possible to work in two different directions from this foundation. What concerns contributors here are short term weather modelling and predictions yet even here the planet's rotation influences the jet stream and the gulf stream in looking towards the direction of geographical climate and ultimately weather.

The motions of the Earth facing in the opposite research direction, but not unrelated to geographical climate is determining what climate the Earth has in contrast to other planets within the Sun-centred system. I recommend that explaining the day/night cycle and the seasons first as a function of geographical climate becomes a point of departure for researching planetary climate and the rate of change and extent in surface,ocean and atmospheric conditions across latitudes over the course of a year.

Nobody is going to thank a person with the more expansive view and they should not expect it. The effort is done for the sheer adventure of it and the breaking up of an old order than no longer applies in the 21st century.

The jet stream and the Earth's rotation

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