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Why is April so dry?

  • 24-04-2022 9:59am
    Registered Users Posts: 4,114 ✭✭✭ arctictree

    I'm a keen Gardner and nearly every April we hit a dry spell after the seeds have been sown. This is when we really need the rain. This has been more pronounced in the last few years.

    Anyone know if there is an underlying meteorological reason for this?


  • Registered Users Posts: 162 ✭✭ Whatdoesitmatter

    @Orion402 Prehaps you might favour us with your opinion

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  • Registered Users Posts: 14,752 ✭✭✭✭ Supercell

    Please don't!

    Nicely done Danno!, never thought about the nuances of land/air and sea temperatures like that, all reasonable conclusions.

    Have a weather station?, why not join the Ireland Weather Network -

  • Registered Users Posts: 408 ✭✭ Orion402

    The polar vortex is linked to the position of the North pole and the expanding and contracting circles with the poles at their centre where solar radiation is constantly present or absent.

    Presently, the circle where solar radiation is constantly present, with the North pole at its centre, is expanding as the North pole (and by association, the entire surface) turns to a midpoint on the June Solstice when the circle reaches its maximum circumference also known as the Arctic circle. The North pole is furthest from the dark hemisphere of the Earth on the June Solstice so as it continues towards the September Equinox, the radius between the North pole and the dark hemisphere shortens and so does the circumference where the Sun remains constantly in view. The presence and disappearance of Arctic sea ice follows this expanding and contracting circle along with the atmosphere above the North pole.

    Understanding the seasons and events in the atmosphere, oceans and landmass by a more productive use of the Earth's daily and annual motion should not receive the resistance it suffers here, after all, this is information sharing and I don't have the sole right to explain why the planet turns in two separate ways to the Sun or the dark hemisphere of the Earth. It is a 100% observational certainty and meshes nicely with seasonal variations in weather patterns-

  • Registered Users Posts: 162 ✭✭ Whatdoesitmatter

    @Orion402 thanks for your excellent response. I greatly enjoy your posts. Please don't let the cavemen who inhabit this forum drive you away

  • Registered Users Posts: 408 ✭✭ Orion402

    To be fair, it would be far better to get commenters to engage in genuine modelling for interpretative reasons rather than the disruptive predictive conclusions which experimental theorists engage in.

    The expanding and contracting circles with the North/South poles at their centre are represented by a fluctuation in surface and atmospheric temperatures North and South of the Equator across an orbital cycle, once again, a property of two separate rotations working in combination-

    If the Earth had the inclination of Jupiter, the Arctic/Antarctic circles would be tiny, so there would be no appreciable fluctuations and temperatures across latitudes would be more or less homogenous.

    If the Earth had an inclination similar to Uranus, those expanding and contracting circles would be extreme so the hemispheres would shift rapidly from red to blue across an orbit where one hemisphere would be totally red while the other is totally blue around the Solstices.

    It is just a different approach to the seasons and ultimately a gateway into more productive and creative climate research.

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  • Registered Users Posts: 13,551 ✭✭✭✭ M.T. Cranium

    Don't these meaningless insults and deliberately obscure posts violate the forum charter?

    We used to have much more intrusive moderators. I once got a stern note because I posted "I heard a bang" on a storm thread.

  • Registered Users Posts: 408 ✭✭ Orion402

    The dynamics behind the polar vortex and its collapse mesh neatly with the motion of the North pole out of the dark hemisphere of the Earth on the March Equinox-

    Tomorrow is the beginning of summer (Bealtaine) as our ancestors divided the year into two halves with the dark half from November 1st (Samhain) to April 30th, at least in the modern calendar, and the light half beginning May 1st. This puts midsummer on June 21st when the daylight hours are the longest, once again, a product of the motions of the planet.

    A more productive way to approach the seasons is the expansion and contraction of those circles, with the North/South poles at their centre. The current expanding circle around the North pole occurs as the radius between the North pole and the dark hemisphere is currently increasing as a function of the orbital motion of the Earth. It replaces the less productive 'tilting Earth' perspective by incorporating two distinct surface rotations acting in combination.

    Nobody is being upstaged, information sharing makes research a much more democratic affair in this era and not all people have the necessary faculties to adjust to a less hierarchical structure where genuine large adjustments are necessary.

  • Registered Users Posts: 4,426 ✭✭✭ maestroamado