Solar plages and the vorticity of the Earth's atmosphere

Olson, Roger H.; Roberts, Walter Orr; Prince, Helen Dodson; Hedeman, E. Ruth

doi:10.1038/274140a0

Cited by 11 publications

(15 citation statements)

References 2 publications

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“…Some works (Olson et al, 1978;Goshdzhanov et al, 1993;Moiseev et al, 1993) indicated that there are solar flare predictors that change certain geophys ical and meteorological parameters on the Earth before a solar flare. Specifically, the H α line changes, the system of loop prominences is formed, the radioe mission at a wavelength of λ = 3 cm with periods of 20-200 min quasiperiodically fluctuates, and the magnetic field and X rays pulsate one-two days before a flare (Moiseev et al, 1993).…”

Section: Discussionmentioning

confidence: 99%

“…Based on a statistical analysis, Olson et al (1978) established that E z and zonal circulation indices increase before solar flares. Moiseev et al (1933) reported that E z increased by 40-50% for a short time 1-2 h before a flare.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of solar flares and cosmic rays in the atmospheric electric field were studied in a number of works (Moiseev et al, 1993;Markson, 1978;Olson et al, 1978;Reagan et al, 1983;Goldberg, 1984;Sheftel et al, 1994;Zadorozhny et al, 1994;Rycroft et al, 2000;Farrel and Desch, 2002). It was noted that precipitation of relativistic protons (E > 450 MeV), which are typical of powerful SCR events (e.g., ground level events, GLEs), can result in considerable varia tions in atmospheric electric properties.…”

Section: Introductionmentioning

confidence: 99%

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Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

2015

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Studies of variations in the atmospheric electric field vertical component (E z ) are illustrated based on data from the Apatity high latitude observatory (geomagnetic latitude Φ' = 63.8°) for three solar cosmic ray (SCR) events that occurred on April 15, April 18, and November 4, 2001. For the SCR event of April 15, 2001, the observed E z variations have been compared with the corresponding data from the Voeykovo midlat itude observatory and the Vostok observatory on the polar cap. It has been indicated that solar coronal mass ejections and some powerful SCR events can result in variations in the global electric circuit. Disturbances in the atmospheric electric field can be used to diagnose the development of intense processes on the Sun.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

2015

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“…Solar flare (SF) and solar cosmic ray (SCR) effects on variations of the fair weather 20 atmospheric electric field (E z ) have been studied in a number of papers (Cobb, 1967;Reiter, 1969;Markson, 1971Markson, , 1978Olson et al, 1978;Reagan et al, 1983;Goldberg, 1984;Moiseev et al, 1993;Zadorozhny et al, 1994;Sheftel et al, 1994;Rycroft et al, 2000). Solar protons of high energies (>450 MeV) lead to different changes of electric properties in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric electric field anomalies associated with solar flare/coronal mass ejection events and solar energetic charged particle "Ground Level Events"

Касаткина¹,

Шумилов²,

Rycroft³

et al. 2009

Preprint

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Abstract. We discuss the fair weather atmospheric electric field signatures of three major solar energetic charged particle events which occurred in on 15 April 2001, 18 April and 4 November, and their causative solar flares/coronal mass ejections (SF/CMEs). Only the 15 April 2001 shows clear evidence for Ez variation associated to SF/CME events and the other two events may support this hypothesis as well although for them the meteorological data were not available. All three events seem to be associated with relativistic solar protons (i.e. protons with energies >450 MeV) of the Ground Level Event (GLE) type. The study presents data on variations of the vertical component of the atmospheric electric field (Ez) measured at the auroral station Apatity (geomagnetic latitude: 63.8°, the polar cap station Vostok (geomagnetic latitude: −89.3°) and the middle latitude stations Voyeikovo (geomagnetic latitude: 56.1°) and Nagycenk (geomagnetic latitude: 47.2°). A significant disturbance in the atmospheric electric field is sometimes observed close to the time of the causative solar flare; the beginning of the electric field perturbation at Apatity is detected one or two hours before the flare onset and the GLE onset. Atmospheric electric field records at Vostok and Voyeikovo show a similar disturbance at the same time for the 15 April 2001 event. Some mechanisms responsible for the electric field perturbations are considered.

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“…Markson estimates a delay of two or three days before increased low latitude convection would affect mid-latitude convergence. Evidence has been found by Olson et al (1978) for the influence of large solar flares and solar plages on the atmospheric circulation at 5oo mbar, as shown by the vAi. The vAi is a measure of the area of the northern hemisphere in which the positive (cyclonic) vorticity of the atmosphere is above certain thresholds.…”

Section: Ii2mentioning

confidence: 91%

Causative factors in climatic fluctuations

Lockwood

1979

Progress in Physical Geography: Earth and Environment

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Bryson (1978) has suggested that weather variations of up to about 10 days are primarily hydrodynamic in character, while longer term changes are primarily thermodynamic and depend on the boundary conditions. The boundary conditions include sea surface temperatures, the distribution of snow and ice, surface albedo, atmospheric composition, and variations in solar radiation. These boundary conditions mostly influence climate by changing the distribution of energy inputs and exchanges. Feedback mechanisms are particularly important in the amplification of small changes in the boundary conditions. Such mechanisms act as internal controls of the climatic system, and display a coupling or mutual compensation among two or more elements of the climatic system. The best known positive feedback mechanism is the snow-albedo-temperature system, in which an increase of snow cover increases the surface albedo and thereby lowers the surface temperature. This decrease in surface temperature leads, all else being equal, to further increases in the extent of snow cover and still lower surface temperatures. Obviously, any positive feedback must be checked at some level by the intervention of other internal adjustment processes, or the climate would exhibit a runaway behaviour.Considerations of feedback mechanisms lead to the definition of climate as the equilibrium state reached by the elements of the atmosphere, hydrosphere, and cryosphere under a set of given and fixed input conditions. Some of the recent research on each of the important boundary conditions is reviewed in this paper. Indirectly, the sun drives all the meteorological at RMIT UNIVERSITY on August 11, 2015 ppg.sagepub.com Downloaded from

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Solar plages and the vorticity of the Earth's atmosphere

Cited by 11 publications

References 2 publications

Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

Atmospheric electric field anomalies associated with solar flare/coronal mass ejection events and solar energetic charged particle "Ground Level Events"

Causative factors in climatic fluctuations

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Solar plages and the vorticity of the Earth's atmosphere

Cited by 11 publications

References 2 publications

Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

Effects of extraordinary solar cosmic ray events on variations in the atmospheric electric field at high latitudes

Atmospheric electric field anomalies associated with solar flare/coronal mass ejection events and solar energetic charged particle &quot;Ground Level Events&quot;

Causative factors in climatic fluctuations

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Product

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Atmospheric electric field anomalies associated with solar flare/coronal mass ejection events and solar energetic charged particle "Ground Level Events"