scholarly journals Atmospheric Gravity Wave Production for the Australian Total Solar Eclipse of 23 October 1976

1979 ◽  
Vol 32 (3) ◽  
pp. 287
Author(s):  
SM Ball
Keyword(s):  
Gravity Wave ◽  
Western Australia ◽  
Gravity Waves ◽  
Solar Eclipse ◽  
Internal Gravity Waves ◽  
Total Solar Eclipse ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

Calculations are presented which suggest that internal gravity waves generated by the 23 October 1976 total solar eclipse would have come to a focus in a region well north of Australia, and also in Antarctica. No evidence is found for a focus in Western Australia, as suggested by Beer et al. (1976).

Atmospheric gravity wave production for the solar eclipse of October 23, 1976

Nature ◽  
1976 ◽  
Vol 264 (5585) ◽  
pp. 420-421 ◽  
Author(s):  
TOM BEER ◽  
G. L. GOODWIN ◽  
G. J. HOBSON
Keyword(s):  
Gravity Wave ◽  
Solar Eclipse ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

scholarly journals Atmospheric Gravity Waves Observed in the Nightglow Following the 21 August 2017 Total Solar Eclipse

2020 ◽  
Vol 47 (17) ◽  
Author(s):  
I. Paulino ◽  
C. A. O. B. Figueiredo ◽  
F. S. Rodrigues ◽  
R. A. Buriti ◽  
C. M. Wrasse ◽  
...  
Keyword(s):  
Gravity Waves ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Atmospheric Gravity Waves ◽  
Atmospheric Gravity

scholarly journals Studies on atmospheric gravity wave activity in the troposphere and lower stratosphere over a tropical station at Gadanki

2005 ◽  
Vol 23 (10) ◽  
pp. 3237-3260 ◽  
Author(s):  
I. V. Subba Reddy ◽  
D. Narayana Rao ◽  
A. Narendra Babu ◽  
M. Venkat Ratnam ◽  
P. Kishore ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Lower Stratosphere ◽  
Wave Length ◽  
Wave Activity ◽  
Lower Atmosphere ◽  
Wind Fields ◽  
Atmospheric Gravity Wave ◽  
Short Period ◽  
Atmospheric Gravity

Abstract. MST radars are powerful tools to study the mesosphere, stratosphere and troposphere and have made considerable contributions to the studies of the dynamics of the upper, middle and lower atmosphere. Atmospheric gravity waves play a significant role in controlling middle and upper atmospheric dynamics. To date, frontal systems, convection, wind shear and topography have been thought to be the sources of gravity waves in the troposphere. All these studies pointed out that it is very essential to understand the generation, propagation and climatology of gravity waves. In this regard, several campaigns using Indian MST Radar observations have been carried out to explore the gravity wave activity over Gadanki in the troposphere and the lower stratosphere. The signatures of the gravity waves in the wind fields have been studied in four seasons viz., summer, monsoon, post-monsoon and winter. The large wind fluctuations were more prominent above 10 km during the summer and monsoon seasons. The wave periods are ranging from 10 min-175 min. The power spectral densities of gravity waves are found to be maximum in the stratospheric region. The vertical wavelength and the propagation direction of gravity waves were determined using hodograph analysis. The results show both down ward and upward propagating waves with a maximum vertical wave length of 3.3 km. The gravity wave associated momentum fluxes show that long period gravity waves carry more momentum flux than the short period waves and this is presented.

Atmospheric Gravity Wave Observations after the Solar Eclipse of June 30, 1973

Nature ◽  
1973 ◽  
Vol 245 (5420) ◽  
pp. 87-88 ◽  
Author(s):  
J. P. SCHÖDEL ◽  
J. KLOSTERMEYER ◽  
J. RÖTTGER
Keyword(s):  
Gravity Wave ◽  
Solar Eclipse ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

scholarly journals On the detection and attribution of gravity waves generated by the 20 March 2015 solar eclipse

2016 ◽  
Vol 374 (2077) ◽  
pp. 20150222 ◽  
Author(s):  
G. J. Marlton ◽  
P. D. Williams ◽  
K. A. Nicoll
Keyword(s):  
Gravity Waves ◽  
Solar Eclipse ◽  
Large Scale ◽  
Sudden Change ◽  
Weather Conditions ◽  
Internal Gravity Waves ◽  
Atmospheric Effects ◽  
Detection And Attribution ◽  
The Uk ◽  
Atmospheric Gravity

Internal gravity waves are generated as adjustment radiation whenever a sudden change in forcing causes the atmosphere to depart from its large-scale balanced state. Such a forcing anomaly occurs during a solar eclipse, when the Moon’s shadow cools part of the Earth’s surface. The resulting atmospheric gravity waves are associated with pressure and temperature perturbations, which in principle are detectable both at the surface and aloft. In this study, surface pressure and temperature data from two UK sites at Reading and Lerwick are examined for eclipse-driven gravity wave perturbations during the 20 March 2015 solar eclipse over northwest Europe. Radiosonde wind data from the same two sites are also analysed using a moving parcel analysis method, to determine the periodicities of the waves aloft. On this occasion, the perturbations both at the surface and aloft are found not to be confidently attributable to eclipse-driven gravity waves. We conclude that the complex synoptic weather conditions over the UK at the time of this particular eclipse helped to mask any eclipse-driven gravity waves. This article is part of the themed issue ‘Atmospheric effects of solar eclipses stimulated by the 2015 UK eclipse’.

scholarly journals Atmospheric gravity waves observed in the nightglow following the 21 August 2017 total solar eclipse}

2020 ◽  
Author(s):  
Igo Paulino ◽  
Cosme A. O. B. Figueiredo ◽  
Fabiano Rodrigues ◽  
Ricardo A. Buriti ◽  
Cristiano M. Wrasse ◽  
...  
Keyword(s):  
Gravity Waves ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Atmospheric Gravity Waves ◽  
Atmospheric Gravity

scholarly journals Atmospheric Gravity Wave Science in the Polar Regions

Eos ◽  
2019 ◽  
Vol 100 ◽  
Author(s):  
Tracy Moffat-Griffin ◽  
Mike Taylor ◽  
Takuji Nakamura ◽  
Damian Murphy ◽  
Jose Bageston ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Polar Regions ◽  
Special Issue ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity Waves ◽  
Global Circulation ◽  
Atmospheric Gravity

A joint special issue explores the potential of collaboration to help understand atmospheric gravity waves in the Polar Regions and their effect on global circulation.

scholarly journals Surface Pressure Fluctuations Produced by the Total Solar Eclipse of 1 August 2008

2013 ◽  
Vol 70 (3) ◽  
pp. 809-823 ◽  
Author(s):  
J. Marty ◽  
F. Dalaudier ◽  
D. Ponceau ◽  
E. Blanc ◽  
U. Munkhuu
Keyword(s):  
Gravity Waves ◽  
Surface Pressure ◽  
Solar Eclipse ◽  
Pressure Fluctuations ◽  
Low Frequency ◽  
Ground Surface ◽  
Internal Gravity Waves ◽  
Total Solar Eclipse ◽  
Atmospheric Tides ◽  
Time Frequency

Abstract During a solar eclipse, the moon’s shadow progressively occults a part of Earth from the solar flux. This induces a cooling in the atmospheric layers that usually absorb the solar radiation. Since the eclipse shadow travels within the atmosphere at supersonic velocity, this cooling generates a planetary-scale bow wave of internal gravity waves. The purpose of this article is to estimate the surface atmospheric pressure fluctuations produced by the passage of the 1 August 2008 total solar eclipse and to compare these pressure fluctuations with those recorded by a temporary network of microbarographs and by the infrasound stations of the International Monitoring System. The surface pressure fluctuations expected at all the measurement sites are estimated using a linear spectral numerical model. It is shown that the cooling of both the ozonosphere and the troposphere can produce detectable pressure fluctuations at the ground surface but that the tropospheric cooling is likely to be the predominant source. Since the expected eclipse signals are in a frequency range that is highly perturbed by atmospheric tides and meteorological phenomena, the pressure fluctuations produced by these latter synoptic disturbances are characterized and removed from the recorded signals. Low-frequency gravity waves starting just after the passage of the eclipse are then brought to light at most measurement sites. The time–frequency characteristics of these waves are similar to those obtained from the model, which strongly suggests that these waves were produced by the passage of the 1 August 2008 solar eclipse.

scholarly journals Detection of stratospheric gravity waves induced by the total solar eclipse of July 2, 2019

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Thomas Colligan ◽  
Jennifer Fowler ◽  
Jaxen Godfrey ◽  
Carl Spangrude
Keyword(s):  
Gravity Waves ◽  
Solar Eclipse ◽  
Middle Atmosphere ◽  
Numerical Models ◽  
Total Solar Eclipse ◽  
Field Campaign ◽  
Definitive Evidence ◽  
Wave Characteristics ◽  
Energy And Momentum ◽  
Atmospheric Gravity

Abstract Atmospheric gravity waves generated by an eclipse were first proposed in 1970. Despite numerous efforts since, there has been no definitive evidence for eclipse generated gravity waves in the lower to middle atmosphere. Measuring wave characteristics produced by a definite forcing event such as an eclipse provides crucial knowledge for developing more accurate physical descriptions of gravity waves. These waves are fundamental to the transport of energy and momentum throughout the atmosphere and their parameterization or simulation in numerical models provides increased accuracy to forecasts. Here, we present the findings from a radiosonde field campaign carried out during the total solar eclipse of July 2, 2019 aimed at detecting eclipse-driven gravity waves in the stratosphere. This eclipse was the source of three stratospheric gravity waves. The first wave (eclipse wave #1) was detected 156 min after totality and the other two waves were detected 53 and 62 min after totality (eclipse waves #2 and #3 respectively) using balloon-borne radiosondes. Our results demonstrate both the importance of field campaign design and the limitations of currently accepted balloon-borne analysis techniques for the detection of stratospheric gravity waves.

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