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The Bølling oscillation was a warm interstadial period between the Oldest Dryas and Older Dryas stadials, at the end of the last glacial period.
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Bølling and oscillation
In such regions the shorter oscillation ending with the Older Dryas is known as the Bølling oscillation, and the Allerød period is the interstadial following the Older Dryas.
Bølling and warm
* The Bølling Oscillation or Interstadial-a warm phase during the last phase of the Weichsel glaciation in Europe.
The Oxygen isotope record from Greenland ice includes the Bølling warm peak between 14, 600 and 14, 100 BP.
Northward migrations coincided with the warm Bølling and Allerød events, but much of northern Eurasia remained inhabited during the Younger Dryas.
The Hamburgian culture existed during the warm Bølling period, the brief Dryas II glaciation ( lasting 300 years ) and in the early warmer Allerød period.
Bølling and interstadial
The Bølling Oscillation and the Allerød Oscillation, where they are not clearly distinguished in the stratigraphy, are taken together to form the Bølling / Allerød interstadial, and dated from about 14, 700 to 12, 700 years before the present.
Bølling and period
* The Bølling Phase-a biostratigraphic subdivision during the early post-glacial period in Europe.
Bølling and Oldest
The beginning of the Bølling is also the high-resolution date for the sharp temperature rise marking the end of the Oldest Dryas at 14, 670 BP.
Bølling and at
It is named after a peat sequence discovered at Bølling lake, central Jutland.
A range of 14, 650-14, 000 BP calibrated has been assigned to the Bølling layer of the excavation at Lake Neuchâtel, Switzerland, 1992-1993.
Bølling and .
Of the two periods, Bølling and Allerød, Bølling is the warmer and came on more suddenly.
oscillation and was
-- An extensive series of measurements was made on a high-density polyethylene in a torsion pendulum instrument using forced sinusoidal oscillation, free vibration, and creep measurements over the temperature range of Af to 80-degrees-C.
They determined to reinvestigate the motion of γ Draconis ; the telescope, constructed by George Graham ( 1675 – 1751 ), a celebrated instrument-maker, was affixed to a vertical chimney stack, in such manner as to permit a small oscillation of the eyepiece, the amount of which ( i. e. the deviation from the vertical ) was regulated and measured by the introduction of a screw and a plumb line.
Also, Armstrong discovered that Lee De Forest's Audion would go into oscillation when feedback was increased.
Susskind argued that the oscillation of the horizon of a black hole is a complete description of both the infalling and outgoing matter, because the world-sheet theory of string theory was just such a holographic description.
It was resolved by discovery of neutrino oscillation and mass.
It had been noticed some time before that if a regenerative receiver was allowed to go into oscillation, other receivers nearby would suddenly start picking up stations on frequencies different from those that the stations were actually transmitted on.
The first recorded observation of an endogenous circadian oscillation was by the French scientist Jean-Jacques d ' Ortous de Mairan in 1729.
Most sources in condemning the practice seem to be referring to a wide, slow, perceptible oscillation in pitch, usually associated with intense emotion, whereas the ideal for modern vibrato, and possibly in earlier times as well, was to imitate the natural timbre of the adult singing voice, from which a measure of vibrato ( it has since been shown ) is rarely absent.
The problem was there was no way to find the location of the center of oscillation in a real pendulum accurately.
If the wire had negligible mass, the center of oscillation was close to the center of gravity of the sphere.
By 1950, Prokhorov was assistant chief of the oscillation laboratory.
At vehicle speeds above 80 km / h, all on-board power was supplied by recovered harmonic oscillation of the magnetic fields created from the track ’ s linear stator ( since these oscillations are parasitic, they cannot be used for vehicle propulsion ).
Tyler also required that improvements be made to the railway's first two steam locomotives, as locomotive No. 1 suffered from excessive " vertical motion " and No. 2 was said to suffer from " horizontal oscillation ".
No. 1 was returned to its manufacturer where a set of trailing wheels was added to reduce the rear overhang, and the springs on No. 2 were adjusted and the crank pins shortened to reduce its oscillation.
Lord Kelvin ( 1882 ) had proposed the so-called " resonance " theory, wherein the semi-diurnal tide would be " selected " over the diurnal oscillation if the atmosphere was somehow able to oscillate freely at a period of very close to 12 hours, in the same way that overtones are selected on a vibrating string.
Lindzen went on to calculate the thermal response of the diurnal tide to ozone and water vapor absorption in detail and showed that when his theoretical developments were included, the surface pressure oscillation was predicted with approximately the magnitude and phase observed, as were most of the features of the diurnal wind oscillations in the mesosphere.
Although it wasn't realized at the time, the quasi-biennial oscillation ( QBO ) was observed during the 1883 eruption of Krakatoa, when the ash from the volcano was transported around the globe from east to west by stratospheric winds in about two weeks.
Having studied mathematics under John Machin and John Keill, in 1708 he obtained a remarkable solution of the problem of the " centre of oscillation ," which, however, remained unpublished until May 1714, when his claim to priority was disputed by Johann Bernoulli.
The paper Mann and Park published in December 1994 came to similar conclusions to a study developed in parallel using different methodology and published in January of that year, which found what was later called the Atlantic multidecadal oscillation.
Pilot-induced oscillation as a result of an over-sensitive, yet slow-response steering system was determined to be the cause.
Pilot-induced oscillation was blamed for the 1992 crash of the prototype F-22 Raptor, landing at Edwards Air Force Base in California.
oscillation and warm
* Assuming that the Atlantic multidecadal oscillation runs through a 70-year quasi-cycle ( after peaks in ≈ 1880 and ≈ 1950 ), its current warm phase is likely to peak during this decade.
Coastal regions of Otago are subject to the alternating warm and dry / cool and wet weather patterns common to the interannual Southern oscillation.
The trade winds blow predominantly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere, strengthening during the winter and when the Arctic oscillation is in its warm phase.
* Pacific decadal oscillation ( PDO )-a 23-year pattern of warm or cool water in the north Pacific.
* Wang, C., S .- K. Lee and D. B. Enfield, 2008: Atlantic warm pool acting as a link between Atlantic multidecadal oscillation and Atlantic tropical cyclone activity.
Strong events in the Madden – Julian oscillation over a series of months in the western Pacific can speed the development of an El Niño or La Niña but usually do not in themselves lead to the onset of a warm or cold ENSO event.
oscillation and period
But when waves with a period of between 10 and 40 minutes begin to roll over the ocean, they set in motion a corresponding oscillation in a column of mercury which closes an electric circuit.
In addition to its amplitude, the motion of a simple harmonic oscillator is characterized by its period T, the time for a single oscillation or its frequency f =, the number of cycles per unit time.
The total period of oscillation is given by:
The time taken for an oscillation to occur is often referred to as the oscillatory period.
shows that the period of oscillation is independent of both the amplitude and gravitational acceleration
This shows that the period of oscillation is independent of the amplitude and mass of the pendulum but not the acceleration due to gravity ( g ), therefore a pendulum of the same length on the Moon would swing more slowly due to the Moon's lower gravitational acceleration.
In every oscillation, the vocal folds are closed for a short period of time.
The period is the time for one complete cycle of an oscillation of a wave.
For example, as noted by Galileo in the late 16th century, the oscillation period of a pendulum is constant, regardless of the angle of the swing.
By his study of the oscillation period of compound pendulums Huygens made pivotal contributions to the development of the concept of moment of inertia.
He also solved the problem posed by Mersenne of how to calculate the period of a pendulum made of an arbitrarily shaped swinging rigid body, discovering the center of oscillation and its reciprocal relationship with the pivot point.
This means if any pendulum is turned upside down and swung from a pivot located at its previous center of oscillation, it will have the same period as before, and the new center of oscillation will be at the old pivot point.
But once they overcame the obstacles, these researchers did confirm a period of about 24 hours as the rotation period of the plane of oscillation
In 1673 Dutch scientist Christiaan Huygens in his mathematical analysis of pendulums, Horologium Oscillatorium, showed that a real pendulum had the same period as a simple pendulum with a length equal to the distance between the pivot point and a point called the center of oscillation, which is located under the pendulum's center of gravity and depends on the mass distribution along the length of the pendulum.
That is, if any pendulum is suspended upside down from its center of oscillation, it has the same period of swing, and the new center of oscillation is the old pivot point.
If a pendulum were hung upside down from a second pivot point which could be adjusted up and down on the pendulum's rod, and the second pivot were adjusted until the pendulum had the same period as it did when swinging right side up from the first pivot, the second pivot would be at the center of oscillation, and the distance between the two pivot points would be L.
As long as each pivot is close to the center of oscillation of the other, so the two periods are close, the period T of the equivalent simple pendulum can be calculated with equation ( 2 ), and the gravity can be calculated from T and L with ( 1 ).
Using this equipment, Cavendish calculated the attraction between the balls from the period of oscillation of the torsion balance, and then he used this value to calculate the density of the Earth.
This is quite different from the quasi-decadal oscillation ( QDO ) with a period of 8 – 12 years and maximum SST anomalies straddling the equator, thus resembling ENSO.
In 1673 Christiaan Huygens derived the equation for the center of oscillation and oscillation period of compound pendulums, thus making use of the general equation for the moment of inertia for the first time.
The quasi-biennial oscillation ( QBO ) is a quasi-periodic oscillation of the equatorial zonal wind between easterlies and westerlies in the tropical stratosphere with a mean period of 28 to 29 months.
0.238 seconds.