Evidence for nonlinear coupling of planetary waves and tides in the Antarctic mesopause

Abstract. Operation of a Meteor Radar at Eureka, Ellesmere Island (80° N, 86° W) began in February 2006. The first 12 months of wind data (82–97 km) are combined with winds from the Adventdalen, Svalbard Island (78° N, 16° E) Meteor Radar to provide the first contemporaneous longitudinally spaced observations of mean winds, tides and planetary waves at such high Arctic latitudes. Unique polar information on diurnal non-migrating tides (NMT) is provided, as well as complementary information to that existing for the Antarctic on the semidiurnal NMT. Zonal and meridional monthly mean winds differed significantly between Canada and Norway, indicating the influence of stationary planetary waves (SPW) in the Arctic mesopause region. Both diurnal (D) and semi-diurnal (SD) winds also demonstrated significantly different magnitudes at Eureka and Svalbard. Typically the D tide was larger at Eureka and the SD tide was larger at Svalbard. Tidal amplitudes in the Arctic were also generally larger than expected from extrapolation of high mid-latitude data. For example time-sequences from ~90 km showed D wind oscillations at Eureka of 30 m/s in February–March, and four day bursts of SD winds at Svalbard reached 40 m/s in June 2006. Fitting of wave numbers for the migrating and non-migrating tides (MT, NMT) successfully determines dominant tides for each month and height. For the diurnal tide, NMT with s=0, +2 (westward) dominate in non-summer months, while for the semi-diurnal tide NMT with s=+1, +3 occur most often during equinoctial or early summer months. These wave numbers are consistent with stationary planetary wave (SPW)-tidal interactions. Assessment of the global topographic forcing and atmospheric propagation of the SPW (S=1, 2) suggests these winter waves of the Northern Hemisphere are associated with the 78–80° N diurnal NMT, but that the SPW of the Southern Hemisphere winter have little influence on the summer Arctic tidal fields. In contrast the large SPW and NMT of the Arctic winter may be associated, consistent with Antarctic observations, with the observed occurrence of the semidiurnal NMT in the Antarctic summer.

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Anomalous quasi-stationary planetary waves over the Antarctic region in 1988 and 2002

Annales Geophysicae ◽

10.5194/angeo-26-1101-2008 ◽

2008 ◽

Vol 26 (5) ◽

pp. 1101-1108 ◽

Cited By ~ 11

Author(s):

A. V. Grytsai ◽

O. M. Evtushevsky ◽

G. P. Milinevsky

Keyword(s):

Lower Stratosphere ◽

Polar Vortex ◽

Amplitude Distribution ◽

Stationary Wave ◽

Planetary Waves ◽

Late Winter ◽

Stratospheric Polar Vortex ◽

Latitudinal Position ◽

The Antarctic ◽

Peak Value

Abstract. Anomalies in the Antarctic total ozone and amplitudes of the quasi-stationary planetary waves in the lower stratosphere temperature during the winter and spring of 1988 and 2002 have been compared. Westward displacement of the quasi-stationary wave (QSW) extremes by 50°–70° relative to the preceding years of the strong stratospheric polar vortex in 1987 and 2001, respectively, was observed. A dependence of the quasi-stationary wave ridge and trough positions on the strength of the westerly zonal wind in the lower stratosphere is shown. Comparison of the QSW amplitude in the lower stratosphere temperature in July and August shows that the amplitude distribution with latitude in August could be considered as a possible indication of the future anomalous warming in Antarctic spring. In August 2002, the QSW amplitude of 10 K at the edge region of the polar vortex (60° S–65° S) preceded the major warming in September, whereas in August 1988, the highest 7 K amplitude at 55° S preceded the large warming in the next months. These results suggest that the peak value of the lower stratosphere temperature QSW amplitude and the peak latitudinal position in late winter can influence the southern polar vortex strength in spring.

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Quasi-biennial oscillation influence on long-period planetary waves in the Antarctic upper mesosphere

Journal of Geophysical Research Atmospheres ◽

10.1029/2008jd011174 ◽

2009 ◽

Vol 114 (D9) ◽

Cited By ~ 25

Author(s):

R. E. Hibbins ◽

M. J. Jarvis ◽

E. A. K. Ford

Keyword(s):

Planetary Waves ◽

Quasi Biennial Oscillation ◽

Long Period ◽

The Antarctic ◽

Biennial Oscillation

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Analysis of the Antarctic Ozone Hole in November

Journal of Climate ◽

10.1175/jcli-d-20-0906.1 ◽

2021 ◽

pp. 1-53

Author(s):

ZHE WANG ◽

JIANKAI ZHANG ◽

TAO WANG ◽

WUHU FENG ◽

YIHANG HU ◽

...

Keyword(s):

Planetary Waves ◽

Ozone Hole ◽

Late Winter ◽

Two Samples ◽

Antarctic Ozone ◽

Ozone Transport ◽

Reflecting Surfaces ◽

The Antarctic ◽

Wave Divergence ◽

Antarctic Ozone Hole

AbstractThe factors responsible for the size of Antarctic ozone hole in November are analyzed. Comparing two samples of anomalously large and small November ozone hole with respect to 1980–2017 climatology in November, the results show that the anomalously large ozone hole in austral late winter is not a precondition for the anomalously large ozone hole in November. The size of Antarctic ozone hole in November is mainly influenced by dynamical processes from the end of October to mid-November. During large November ozone hole events, weaker dynamical ozone transport appears from the end of October to mid-November, which is closely related to planetary wave divergence in the stratosphere between 60°S and 90°S. Further analyses indicate that the wave divergence is partially attributed to less upward propagation of planetary waves from the troposphere, which is associated with weak baroclinic disturbances at the end of October. Subsequently, zonal wind speed in the upper stratosphere intensifies, and the distance between critical layer (U=0) and wave reflecting surfaces becomes larger. As a result, more planetary waves are reflected and then wave divergence enhances. The processes responsible for the anomalously small Antarctic ozone holes in November are almost opposite to those for the anomalously large Antarctic ozone holes.

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Seasonal changes of the activity of quasi-stationary planetary waves in the stratosphere over the Antarctic

Kosmìčna nauka ì tehnologìâ ◽

10.15407/knit2006.04.071 ◽

2006 ◽

Vol 12 (4) ◽

pp. 71-77

Author(s):

A.V. Grytsai ◽

◽

O.M. Evtushevsky ◽

Keyword(s):

Seasonal Changes ◽

Planetary Waves ◽

The Antarctic

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Ionospheric variability due to planetary waves and tides for solar minimum conditions

Journal of Geophysical Research Atmospheres ◽

10.1029/2009ja015188 ◽

2010 ◽

Vol 115 (A6) ◽

pp. n/a-n/a ◽

Cited By ~ 152

Author(s):

H.-L. Liu ◽

W. Wang ◽

A. D. Richmond ◽

R. G. Roble

Keyword(s):

Solar Minimum ◽

Planetary Waves ◽

Ionospheric Variability ◽

Waves And Tides

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More evidence for a planetary wave link with midlatitude <i>E</i> region coherent backscatter and sporadic <i>E</i> layers

Annales Geophysicae ◽

10.1007/s00585-000-1182-8 ◽

2000 ◽

Vol 18 (9) ◽

pp. 1182-1196 ◽

Cited By ~ 21

Author(s):

M. Voiculescu ◽

C. Haldoupis ◽

D. Pancheva ◽

M. Ignat ◽

K. Schlegel ◽

...

Keyword(s):

Planetary Wave ◽

Close Relation ◽

Planetary Waves ◽

Neutral Wind ◽

Spectral Peaks ◽

Direct Indication ◽

E Region ◽

Waves And Tides ◽

Coherent Backscatter

Abstract. Measurements of midlatitude E region coherent backscatter obtained during four summers with SESCAT, a 50 MHz Doppler system operating in Crete, Greece, and concurrent ionosonde recordings from the same ionospheric volume obtained with a CADI for one of these summers, are used to analyse the long-term variability in echo and Es occurrence. Echo and Es layer occurrences, computed in percent of time over a 12-h nighttime interval, take the form of time sequences. Linear power spectrum analysis shows that there are dominant spectral peaks in the range of 2–9 days, the most commonly observed periods appearing in two preferential bands, of 2–3 days and 4–7 days. No connection with geomagnetic activity was found. The characteristics of these periodicities compare well with similar properties of planetary waves, which suggests the possibility that planetary waves are responsible for the observed long-term periodicities. These findings indicate also a likely close relation between planetary wave (PW) activity and the well known but not well understood seasonal Es dependence. To test the PW postulation, we used simultaneous neutral wind data from the mesopause region around 95 km, measured from Collm, Germany. Direct comparison of the long-term periodicities in echo and Es layer occurrence with those in the neutral wind show some reasonable agreement. This new evidence, although not fully conclusive, is the first direct indication in favour of a planetary wave role on the unstable midlatitude E region ionosphere. Our results suggest that planetary waves observation is a viable option and a new element into the physics of midlatitude Es layers that needs to be considered and investigated.Key words: Ionosphere (ionosphere irregularities; mid-latitude ionosphere) – Meteorology and atmospheric dynamics (waves and tides)

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