Global-scale tidal variability during the PSMOS campaign of June–August 1999: interaction with planetary waves

During the PSMOS Global-scale tidal variability experiment campaign of June 1-August 31, 1999, a network of radars made measurements of winds, waves and tides in the mesosphere/lower-thermosphere region over a wide range of latitudes. Clear evidence was found that fluctuations in tidal amplitudes occur on a global scale in both hemispheres, and that at least some of these fluctuations are periodic in nature. Modulation of the amplitude of the 12 h tide was particularly evident at periods of 10 and 16 days, suggesting a non-linear interaction with planetary waves of those periods to be responsible. In selected cases, the secondary waves predicted from non-linear theory could be identified and their zonal wave numbers determined. In some, but not all, cases the longitudinal structure of the secondary waves supports the theory of planetary-wave/tidal interaction being responsible for the observed tidal modulation. It was noted also that beating between a 12.4-lunar and the solar tide could produce a near 16-day modulation of the 12 h tide amplitude that is frequently observed in late summer.

[1]  R. Rüster.  VHF radar observations of nonlinear interactions in the summer polar mesosphere , 1994 .

[2]  D. Altadill,et al.  Characteristics of quasi‐2‐day oscillations in the ƒ oF2 at northern middle latitudes , 1995 .

[3]  R. Schminder,et al.  Solar cycle dependence of winds in the lower ionosphere , 1969 .

[4]  Jeffrey M. Forbes,et al.  On modeling migrating solar tides , 1995 .

[5]  D. Fritts,et al.  Long‐term MF radar observations of solar tides in the low‐latitude mesosphere: Interannual variability and comparisons with the GSWM , 1998 .

[6]  P. Espy,et al.  Interannual variations of the quasi‐16‐day oscillation in the polar summer mesospheric temperature , 1997 .

[7]  F. Vial.  Numerical simulations of atmospheric tides for solstice conditions , 1986 .

[8]  Ch. Jacobi,et al.  Some results of S-transform analysis of the transient planetary-scale wind oscillations in the lower thermosphere , 1999 .

[9]  C. Jacobi,et al.  Lunar tidal winds in the upper atmosphere over Collm , 2000 .

[10]  H. Teitelbaum,et al.  Non-linear interaction between the diurnal and semidiurnal tides: terdiurnal and diurnal secondary waves , 1989 .

[11]  P. Mukhtarov,et al.  Wavelet analysis on transient behaviour of tidal amplitude fluctuations observed by meteor radar in the lower thermosphere above Bulgaria , 2000 .

[12]  P. Mukhtarov,et al.  Variability of mesospheric dynamics observed at Yambol (42.5°N, 26.6°E) by meteor radar , 1994 .

[13]  A. Manson,et al.  Variations of mean winds and tides in the upper middle atmosphere over a solar cycle, Saskatoon, Canada, 52°N, 107°W , 1993 .

[14]  D. A. Carter,et al.  The Summer Wind Field Between 80 and 93 km Observed by the MST Radar at Poker Flat, Alaska (65°N) , 1982 .

[15]  N. Mitchell,et al.  Non-linear planetary/tidal wave interactions in the lower thermosphere observed by meteor radar , 1996 .

[16]  A. Manson,et al.  Long period (∼8–20 h) wind oscillations in the upper middle atmosphere at Saskatoon (52°N): Evidence for non-linear tidal effects , 1990 .

[17]  Farzad Kamalabadi,et al.  Evidence for nonlinear coupling of planetary waves and tides in the Antarctic mesopause , 1997 .

[18]  B. L. Kashcheyev,et al.  Global-scale tidal structure in the mesosphere and lower thermosphere during the PSMOS campaign of June-August 1999 and comparisons with the global-scale wave model , 2002 .

[19]  P. J. Williams,et al.  Observations of day-to-day variability in the meridional semi-diurnal tide at 70 deg N , 1991 .

[20]  Lalu Mansinha,et al.  Localization of the complex spectrum: the S transform , 1996, IEEE Trans. Signal Process..

[21]  G. Hall,et al.  CORRELATIONS OF GRAVITY WAVES AND TIDES IN THE MESOSPHERE OVER SASKATOON , 1998 .

[22]  M. Hagan.  Comparative effects of migrating solar sources on tidal signatures in the middle and upper atmosphere , 1996 .

[23]  Y. Portnyagin,et al.  Tides in the 80–100 km height region , 1986 .

[24]  S. Kingsley,et al.  Non-linear effects on tidal and planetary waves in the lower thermosphere: Preliminary results , 1992 .

[25]  D. Pancheva.  Non-linear interaction of tides and planetary waves in the mesosphere and lower thermosphere: observations over Europe , 2001 .

[26]  J. Forbes,et al.  Diurnal propagating tide in the presence of mean winds and dissipation : a numerical investigation , 1988 .

[27]  J. Forbes,et al.  The quasi 16‐day oscillations in the mesosphere and lower thermosphere at Saskatoon (52°N, 107°W), 1980–1996 , 2000 .

[28]  R. R. Clark,et al.  Bispectral analysis of mesosphere winds , 1997 .

[29]  Takuji Nakamura,et al.  Short‐period fluctuations of the diurnal tide observed with low‐latitude MF and meteor radars during CADRE: Evidence for gravity wave/tidal interactions , 1997 .

[30]  R. Rüster.  VHF radar observations in the summer polar mesosphere indicating nonlinear interaction , 1992 .

[31]  Y. Rochon,et al.  The meridional wind component of the thermospheric tide observed by WINDII on UARS , 1994 .

[32]  B. Khattatov,et al.  Modeling the diurnal tide with dissipation derived from UARS/HRDI measurements , 1997 .

[33]  J. Bremer,et al.  Long-term trends in the mesopause wind field obtained from LF D1 wind measurements at Collm, Germany , 1997 .

[34]  J. Forbes,et al.  Monthly simulations of the lunar semi-diurnal tide , 1994 .

[35]  R. Bernard.  Variability of die semi-diurnal tide in the upper mesosphere , 1981 .

[36]  R. Vincent,et al.  Lunar tidal winds at Adelaide and Saskatoon at 80 to 100 km heights: 1985‐1990 , 1994 .

[37]  M. Farge.  Wavelet Transforms and their Applications to Turbulence , 1992 .

[38]  W. Singer,et al.  Climatology of the semidiurnal tide at 52–56°N from ground-based radar wind measurements 1985–1995 , 1999 .

[39]  David C. Fritts,et al.  Mesospheric Momentum Flux Studies at Adelaide, Australia: Observations and a Gravity Wave–Tidal Interaction Model , 1987 .

[40]  G. Hall,et al.  Daily tidal, planetary wave, and gravity wave amplitudes over the Canadian prairies , 1995 .

[41]  J. Forbes,et al.  Recent progress in tidal modelling , 1989 .

[42]  D. Chakrabarty,et al.  Fluctuations in tidal (24-, 12-h) characteristics and oscillations (8-h-5-d) in the mesosphere and lower thermosphere (70-110 km): Saskatoon (52°N, 107°W), 1979-1981 , 1982 .

[43]  T. Tsuda,et al.  Asymmetries in mesospheric tidal structure , 1989 .

[44]  R. Roble,et al.  Migrating thermospheric tides , 2001 .

[45]  J. Forbes,et al.  Quasi 16‐day oscillation in the mesosphere and lower thermosphere , 1995 .

[46]  J. Forbes,et al.  Diurnal tidal variability in the upper mesosphere and lower thermosphere , 1997 .

[47]  N. Mitchell,et al.  Non-linear interactions between tides and planetary waves resulting in periodic tidal variability , 1999 .

[48]  A. Manson,et al.  Middle atmosphere (60–110 km) tidal oscillations at Saskatoon, Canada (52°N, 107°W) during 1983–1984 , 1985 .

[49]  J. Forbes,et al.  The summertime 12-h wind oscillation with zonal wavenumber s = 1 in the lower thermosphere over the South Pole , 1998 .

[50]  T. Tsuda,et al.  Thermal excitation of non-migrating tides , 1982 .

[51]  S. Franke,et al.  Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2 to 70°N, and the GSWM tidal model , 1999 .

[52]  J. Forbes,et al.  Variability in the upward propagating semidiurnal tide due to effects of QBO in the lower atmosphere , 1992 .

[53]  K. Greisiger,et al.  Long-period variations of wind parameters in the mesopause region and the solar cycle dependence , 1987 .

[54]  J. Forbes,et al.  Monthly simulations of the solar semidiurnal tide in the mesosphere and lower thermosphere , 1989 .

[55]  G. D. Nastrom,et al.  Seasonal and solar cycle wind variations, 80-100 km , 1983 .

[56]  H. G. Muller,et al.  The 16-day planetary wave in the mesosphere and lower thermosphere , 1999 .

[57]  H. Teitelbaum,et al.  On tidal variability induced by nonlinear interaction with planetary waves , 1991 .

[58]  J. Salah,et al.  Propagation of the solar semidiurnal tide in the mesosphere and lower thermosphere at mid latitudes , 1991 .

[59]  D. Pancheva.  Evidence for nonlinear coupling of planetary waves and tides in the lower thermosphere over Bulgaria , 2000 .

[60]  R. Vincent,et al.  High-latitude tidal behavior in the mesosphere and lower thermosphere , 1989 .