In the UVS worldview, the nested polar vortex of Earth is a global scale clear air cyclonic storm, and it vortically impels the meandering jet streams around it. From the UVS perspective, the polar jet streams are manifested in the nested atmospheric layers, and they are impelled by their underlying nested polar vortex pair to vortically manifest around the polar axis as ring torus[w] structures in a nested arrangement. And the symmetrical ring torus structures, are the vortical substructures of the nested polar vortex pair.

Polar vortex

A ring torus structure.

See the UVS topic on "The nested polar vortex pair" that illustrates the apparently convex structure of a nested atmosphere in a hemisphere, is paradoxically a concave structure.

From the UVS perspective, the subtropical jet stream[w] is vortically formed as the outer ring torus structure of the nested polar vortex at around its outer vortex column

And the polar jet stream[w] is vortically formed as the inner ring torus structure of the nested polar vortex at around its outer vortex column.

As can be empirically observed with its underlying vortical structure and mechanism illustrated, a polar jet stream is a ring torus manifested in its nested polar vortex; the observation is a qualitative proof that a polar jet stream is a sub-structure of its nested atmospheric polar vortex.

The UVS research predicates a polar jet stream is manifested in the ring torus structure that has vortically formed in its nested atmospheric polar vortex. 

The grounding for its epistemic theories of truth: The underlying vortical structure and mechanism of a jet stream as explicated with its hypothetical construct based on the UVS model, elucidated its delusional observations that render its misconceptions, mysteries, and anomalies. Thus, its cognitive paradox was meticulously resolved, and all the related natural phenomena were then qualitatively analysed in the conceptual framework of UVS by inductive reasoning for explicating with their empirical evidence to predicate by abductive reasoning.

See the UVS topics on "The UVS' philosophy of science" and "Overviews of the UVS research" that elaborate on the methodology for the evaluations of natural phenomena.

Based on the unisonal vortex mechanism[uvs], a polar jet stream is formed with the precession[w] effect of a wobbling Earth. And the culmination of vortical momentum in the medium of the nested atmosphere, manifests the polar jet stream as a meandering nested ring torus structure of airflow with closed streamlines[w].

The bottom section of the unisonal vortex is where momentum culmination of vortical forces is at its peak, this is where the discharging of vortex energy is at its maximal. The air pressure, angular momentum, and wind speed are at their highest with the radius of its vortex column is almost at its smallest radius at the bottom, vorticity is therefore is at its maximum there. This culminated vortical force of a vortex is being pushed back by pushing on an atmospheric surface that has not vortically forced open, and therefore air is vortically pushed out upward to form as a vortrex[uvs].

See the UVS topics on "The vortices of Jupiter" that illustrates how jet streams are driven by their polar vortices to form as cloud bands, "Tornado" that elaborates on how a tornado cluster can be impelled by a polar jet stream, "Ocean jet stream" that elaborates on how oceanic jet streams are caused by a nested oceanic free vortex, "Dust devil" that elaborates on the upward-lifting mechanism of vortrex, and "The causality of subtropical deserts" that elaborate on how subtropical deserts were caused by the subtropical jet stream with the Hadley cells it impels.

From the UVS perspective, a jet stream and its polar vortex function as a unisonal vortical system. And its vortex eye can open wider to a lower latitude region when the polar vortex is intensified, or reduce in diameter and thus moves to a higher latitude region when the polar vortex is weakened. Perceivably, the phenomenon of jet stream shift is caused by the intensity variations and the rotation of its undulating polar vortex.

See an externally linked topic on "A Shift Toward Aridity" that reports on shifting of jet stream.

The UVS research predicates the shifting of jet stream latitude is caused by the intensity variations and the rotation of its undulating polar vortex.

If a Solar System alignment[uvs] has focused precession effects at winter night when Moon is also aligned with Sun, with all else unchanged, the jet stream would have a higher wind speed with the vorticity of its nested polar vortex intensified. Effectively, this is an alignment of the Earth, the barycenter of the Earth and the Moon, and the barycenter of the Solar System.

See the UVS subtopic on "The T-junction crossed alignment of Solar System objects" that elaborates on the vortical effects caused by a peculiar arrangement of Solar System objects

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Subtropical jet stream

From the UVS perspective, a subtropical jet stream is rendered by the vortical column of its polar vortex of the stratosphere that has had opened up to the subtropical region around the Earth.

For its comparative analysis with the cloud bands of Jupiter[uvs], the subtropical jet stream pair on Earth is a pair of cloud bands that has vortically formed by its pair of stratosphere polar vortices with their vortex columns opened to the subtropical latitudes on both hemispheres.

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Easterly jet stream

From the UVS perspective, the easterly jet stream that has manifested on the surface of troposphere, was impelled by the anti-cyclonic satellite vortex of the nested polar vortex.

The satellite image on right shows a meandering nested polar vortex that has had occurred on several atmospheric layers at the northern hemisphere, accompanied with its anti-cyclonic satellite vortex formed at just after its 5 o'clock position. Apparently, the meandering shape polar vortrex[uvs] is vortically resonated by its nested polar vortex, and it was subjected to the dragging effects of a landmass[uvs] that could thus form eddies[w]. The torque-induced precession[w] effect that impels the satellite vortex, perceivably is rendered by the subtropical jet stream that culminates angular momentum at the caved-in region of the nested polar vortex. This driving force rendered by the polar vortex, causes the satellite vortex to spin in the clockwise direction as an anti-cyclone. A jet stream manifested by the anti-cyclonic satellite vortex around its six o'clock region, is thus an easterly.

Satellite image of a nested polar vortex.

See the UVS topic on "The retrograde cloud bands of Jupiter" that illustrates the underlying mechanism for the easterly jet streams on Jupiter.

“By visualizing the underlying structures and mechanisms, it intuitively reveals
the actualities of the mysteriously rendered natural phenomena.” - UVS inspired -

Glossary:
easterly - A storm or wind coming from the east, toward the west; westwardly.
westerly - A storm or wind coming from the west, toward the east; eastwardly.

Image and animation credits:
Image of Earth's jet streams - National Weather Service
Image of cross section of the subtropical and polar jet streams by latitude - National Weather Service
Image of ring torus - knill.harvard.edu
Earth's atmosphere Chart - NASA
Image of polar vortex on northern hemisphere - Science Daily
A simple sketch for illustrating the airflow of a wider vortical system in between two atmospheric layers. - By Vincent Wee-Foo

The classified denotations with URL links for the individual words and specific phrases denoted in the UVS treatise:

The inception of this UVS topic was in May 2007 with ongoing updates since.

Disclaimers: The treatise of Universal Vortical Singularity (UVS) in its epistemological paradigm shift, is fundamentally unconventional. Its hypotheses grounded on a generally unheard-of UVS model, bound to have shortcomings, such as loose ends, errors, and omissions errors. Many details and assumptions in its propositions have yet to be further researched, probed, evaluated, validated, or verified. Its implicit explanations are for casual understanding of the UVS topics presented in the UVS worldview, so if any term or statement is offensive in any manner from whatsoever perspectives, is most regretted. Links to other sites do not imply endorsement of their contents; apply appropriate discretion whenever necessary. Also, the content of the UVS topics, from time to time could be arbitrarily modified without any notice.

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