Characterization of inertia gravity waves and associated dynamics in the lower stratosphere over the Indian Antarctic station, Bharati (69.4°S, 76.2°E) during austral summers

  • N. KoushikEmail author
  • Karanam Kishore Kumar
  • K. V. Subrahmanyam
  • Geetha Ramkumar
  • I. A. Girach
  • M. Santosh
  • K. Nalini
  • M. Nazeer
  • P. R. Shreedevi


Atmospheric gravity waves over the Polar Regions are found to have myriad effects on the dynamics and chemistry of the middle atmosphere. Data collected from high vertical resolution radiosonde measurements carried out in campaign mode from the Indian research base in Antarctica, Bharati (69.4°S, 76.2°E) during the austral summer seasons of 2014–2015, 2015–2016 and 2016–2017 were used to characterize inertia gravity waves (IGWs). Wavelet analysis technique is employed to identify and isolate individual IGW packets. IGWs in the lower stratosphere region are characterized in terms of their vertical and horizontal wavelengths, intrinsic frequencies, directions of propagation, momentum fluxes, energy densities and ground based phase speeds. The observed gravity waves have short vertical wavelengths (~ 2 km) and low intrinsic frequencies (1f–2f). Zonal and meridional components of momentum fluxes are found to have comparable magnitudes. From the direction of propagation estimates, it is observed that the IGWs have a marginal predisposition towards eastward propagation during austral summers. It is found that the lower stratospheric region over Bharati during summertime is dominated by IGWs from non-orographic sources. Evidences for generation of IGWs from an upper tropospheric jet streak observed over Bharati station are provided. The jet streak is found to be associated with the intrusion of low potential vorticity air from middle latitudes and the accompanied development of an anti-cyclonic circulation. The observations suggest that low potential vorticity intrusion happened as a result of breaking of poleward propagating Rossby wave. Spontaneous adjustment of the unstable jet could be responsible for the IGW generation. The significance of the present results lie in characterizing the summer time IGW over the Bharati station for the first time using wavelet based approach and identifying the possible source mechanism.


Middle atmosphere dynamics Inertia gravity waves Lower stratosphere Wavelet analysis 



N. Koushik gratefully acknowledges the financial support and research opportunity provided by Indian Space Research Organization (ISRO) for his research work. The authors thank the India Meteorological Department (IMD) for providing hydrogen gas cylinders for balloon ascents. Thanks to the National Centre for Polar and Ocean Research (NCPOR) and all the expedition members for providing necessary logistic support for the conduct of experiments during the Indian Scientific Expeditions to Antarctica. The authors wish to express their gratitude towards Director, SPL for the constant support and encouragement. We gratefully thank two anonymous reviewers for their insightful comments.


  1. Alexander MJ (1998) Interpretations of observed climatological patterns in stratospheric gravity wave variance. J Geophys Res 103:8627–8640CrossRefGoogle Scholar
  2. Alexander MJ, Barnet C (2007) Using satellite observations to constrain parameterizations of gravity wave effects for global models. J Atmos Sci 64:1652–1665. CrossRefGoogle Scholar
  3. Alexander MJ, Grimsdell AW (2013) Seasonal cycle of orographic gravity wave occurrence above small islands in the Southern Hemisphere: implications for effects on the general circulation. J Geophys Res Atmos 118:11589–11599. CrossRefGoogle Scholar
  4. Alexander MJ, Geller M, McLandress C et al (2010) Recent developments in gravity-wave effects in climate models and the global distribution of gravity-wave momentum flux from observations and models. Q J R Meteorol Soc 136:1103–1124. Google Scholar
  5. Alexander SP, Klekociuk AR, Pitts MC et al (2011) The effect of orographic gravity waves on Antarctic polar stratospheric cloud occurrence and composition. J Geophys Res Atmos 116:1–15. Google Scholar
  6. Allen SJ, Vincent RA (1995) Gravity wave activity in the lower atmosphere: seasonal and latitudinal variations. J Geophys Res 100:1327–1350CrossRefGoogle Scholar
  7. Antonita TM, Ramkumar G, Kumar KK et al (2007) A quantitative study on the role of gravity waves in driving the tropical Stratospheric Semiannual Oscillation. J Geophys Res Atmos 112:1–10. CrossRefGoogle Scholar
  8. Baldwin MP, Gray LJ, Dunkerton TJ et al (2001) The quasi-biennial oscillation. Rev Geophys 39(2):179–229CrossRefGoogle Scholar
  9. Bandoro J, Solomon S, Donohoe A et al (2014) Influences of the antarctic ozone hole on southern hemispheric summer climate change. J Clim 27:6245–6264. CrossRefGoogle Scholar
  10. Butchart N, Charlton-Perez AJ, Cionni I et al (2011) Multimodel climate and variability of the stratosphere. J Geophys Res Atmos 116:1–21. CrossRefGoogle Scholar
  11. Chandran A, Rusch DW, Palo SE et al (2009) Gravity wave observations in the summertime polar mesosphere from the Cloud Imaging and Particle Size (CIPS) experiment on the AIM spacecraft. J Atmos Sol Terr Phys 71:392–400. CrossRefGoogle Scholar
  12. Cho JYN (1995) Inertio-gravity wave parameter estimation from cross-spectral analysis. J Geophys Res 100:18727. CrossRefGoogle Scholar
  13. Choi H-J, Chun H-Y (2013) Effects of convective gravity wave drag in the southern hemisphere winter stratosphere. J Atmos Sci 70:2120–2136. CrossRefGoogle Scholar
  14. Dalin P, Gavrilov N, Pertsev N et al (2016) A case study of long gravity wave crests in noctilucent clouds and their origin in the upper tropospheric jet stream. J Geophys Res Atmos 121:14102–14116. CrossRefGoogle Scholar
  15. Dunkerton TJ (1997) The role of gravity waves in the quasi-biennial oscillation. J Geophys Res 102:26053–26076CrossRefGoogle Scholar
  16. Eckermann SD (1996) Hodographic analysis of gravity waves: relationships among Stokes parameters, rotary spectra and cross-spectral methods. J Geophys Res 101:19169. CrossRefGoogle Scholar
  17. Eckermann SD, Hocking WK (1989) Effect of superposition on measurements of atmospheric gravity waves: a cautionary note and some reinterpretations. J Geophys Res 94:6333–6339. CrossRefGoogle Scholar
  18. Eckermann SD, Hirota I, Hocking WK (1995) Gravity wave and equatorial wave morphology of the stratosphere derived from long-term rocket soundings. Q J R Meteorol Soc 121:149–186. CrossRefGoogle Scholar
  19. Fritts DC, Alexander MJ (2003) Gravity wave dynamics and effects in the middle atmosphere. Rev Geophys 41:1003. CrossRefGoogle Scholar
  20. Garcia RR, Smith AK, Kinnison DE et al (2017) Modification of the gravity wave parameterization in the whole atmosphere community climate model: motivation and results. J Atmos Sci 74:275–291. CrossRefGoogle Scholar
  21. Guest FM, Reeder MJ, Marks CJ, Karoly DJ (2000) Inertia–gravity waves observed in the lower stratosphere over Macquarie Island. J Atmos Sci 57:737–752CrossRefGoogle Scholar
  22. Hertzog A, Boccara G, Vincent RA, Vial F (2008) Estimation of gravity wave momentum flux and phase speeds from quasi-lagrangian stratospheric balloon flights. Part I: theory and simulations. J Atmos Sci 65:3042–3055. CrossRefGoogle Scholar
  23. Hertzog A, Alexander MJ, Plougonven R (2012) On the intermittency of gravity wave momentum flux in the stratosphere. J Atmos Sci 69:3433–3448. CrossRefGoogle Scholar
  24. Hines CO (1968) A possible source of waves in noctilucent clouds. J Atmos Sci 25:937–942CrossRefGoogle Scholar
  25. Hirasawa N, Nakamura H, Yamanouchi T (2000) Abrupt changes in meteorological conditions observed at an inland Antarctic station in association with wintertime blocking. Geophys Res Lett 27:1911–1914CrossRefGoogle Scholar
  26. Holton JR (1983) The influence of gravity wave breaking in the genral circulation of the middle atmosphere. J Atmos Sci 40:2497–2507CrossRefGoogle Scholar
  27. Jewtoukoff V, Hertzog A, Plougonven R et al (2015) Comparison of gravity waves in the southern hemisphere derived from balloon observations and the ECMWF analyses. J Atmos Sci 72:3449–3468. CrossRefGoogle Scholar
  28. John SR, Kumar KK (2012) TIMED/SABER observations of global gravity wave climatology and their interannual variability from stratosphere to mesosphere lower thermosphere. Clim Dyn. Google Scholar
  29. Kohma M, Sato K (2011) The effects of atmospheric waves on the amounts of polar stratospheric clouds. Atmos Chem Phys 11:11535–11552. CrossRefGoogle Scholar
  30. Kumar KK (2006) VHF radar observations of convectively generated gravity waves: some new insights. Geophys Res Lett 33:L01815. Google Scholar
  31. Li Z, Robinson W, Liu AZ (2009) Sources of gravity waves in the lower stratosphere above South Pole. J Geophys Res Atmos 114:1–14. Google Scholar
  32. Lindzen RS (1981) Turbulence and stress owing to gravity wave and tidal breakdown. J Geophys Res 86:9707–9714CrossRefGoogle Scholar
  33. McLandress C, Scinocca JF (2005) The GCM response to current parameterizations of nonorographic gravity wave drag. J Atmos Sci 62:2394–2413CrossRefGoogle Scholar
  34. McLandress C, Shepherd TG, Polavarapu S, Beagley SR (2011) Is missing orographic gravity wave drag near 60°S the cause of the stratospheric zonal wind biases in chemistry-climate models? J Atmos Sci 69:802–818. CrossRefGoogle Scholar
  35. Mihalikova M, Sato K, Tsutsumi M, Sato T (2016) Properties of inertia-gravity waves in the lowermost stratosphere as observed by the PANSY radar over Syowa Station in the Antarctic. Ann Geophys 34:543–555. CrossRefGoogle Scholar
  36. Moffat-Griffin T, Colwell SR (2017) The characteristics of the lower stratospheric gravity wavefield above Halley (75°S, 26°W), Antarctica, from radiosonde observations. J Geophys Res Atmos 122:8998–9010. CrossRefGoogle Scholar
  37. Moffat-Griffin T, Hibbins RE, Jarvis MJ, Colwell SR (2011) Seasonal variations of gravity wave activity in the lower stratosphere over an Antarctic Peninsula station. J Geophys Res Atmos 116:1–10. CrossRefGoogle Scholar
  38. Murphy DJ, Alexander SP, Klekociuk AR et al (2014) Radiosonde observations of gravity waves in the lower stratosphere over Davis, Antarctica. J Geophys Res 119:11973–11996. Google Scholar
  39. Pfenninger M, Liu AZ, Papen GC, Gardner CS (1999) Gravity wave characteristics in the lower atmosphere at south pole. J Geophys Res 104:5963. CrossRefGoogle Scholar
  40. Plougonven R, Teitelbaum H, Zeitlin V (2003) Inertia gravity wave generation by the tropospheric midlatitude jet as given by the Fronts and Atlantic Storm-Track Experiment radio soundings. J Geophys Res Atmos. Google Scholar
  41. Preusse P, Eckermann SD, Offermann D (2000) Comparison of global distributions of zonal-mean gravity wave variance inferred from different satellite instruments. Geophys Res Lett 23:3877–3880CrossRefGoogle Scholar
  42. Riggin DM, Fritts DC, Fawcett CD, Kudeki E, Hitchman MH (1997) Radar observations of gravity waves over Jicamarca, Peru, during the CADRE campaign.J Geophys Res 102:26263–26281CrossRefGoogle Scholar
  43. Sato K (2000) Sources of gravity waves in the polar middle atmosphere. Adv Polar Upper Atmos Res 14:233–240Google Scholar
  44. Sato K, Yoshiki M (2008) Gravity wave generation around the polar vortex in the stratosphere revealed by 3-hourly radiosonde observations at Syowa Station. J Atmos Sci 65:3719–3735. CrossRefGoogle Scholar
  45. Sato K, Tateno S, Watanabe S, Kawatani Y (2012) Gravity wave characteristics in the southern hemisphere revealed by a high-resolution middle-atmosphere general circulation model. J Atmos Sci 69:1378–1396. CrossRefGoogle Scholar
  46. Shibata T, Sato K, Kobayashi H et al (2003) Antarctic polar stratospheric clouds under temperature perturbation by nonorographic inertia gravity waves observed by micropulse lidar at Syowa Station. Antarct Rec 54:779–792. Google Scholar
  47. Sinclair MR (1981) Record-high temperatures in the Antarctic—a synoptic case study. Mon Weather Rev 109:2234–2242CrossRefGoogle Scholar
  48. Smith AK (2012) Global dynamics of the MLT. Surv Geophys 33:1177–1230. CrossRefGoogle Scholar
  49. Torrence C, Compo GP (1998) A practical guide to wavelet analysis. Bull Am Meteorol Soc 79:61–78CrossRefGoogle Scholar
  50. Uccellini LW, Koch SE (1987) The synoptic setting and possible energy sources for mesoscale wave disturbances. Mon Weather Rev 115:721–729CrossRefGoogle Scholar
  51. Vincent RA, Fritts DC (1987) A climatology of gravity wave motions in the mesopause region at Adelaide, Australia. J Atmos Sci 44:748–760CrossRefGoogle Scholar
  52. Vincent RA, Hertzog A (2014) The response of superpressure balloons to gravity wave motions. Atmos Meas Tech 7:1043–1055. CrossRefGoogle Scholar
  53. Wang L, Geller MA (2003) Morphology of gravity-wave energy as observed from 4 years (1998–2001) of high vertical resolution U.S. radiosonde data. J Geophys Res 108:1–12. Google Scholar
  54. Wilms H, Rapp M, Hoffman P et al (2013) Gravity wave influence on NLC: experimental results from ALOMAR, 69°N. Atmos Chem Phys 13:11951–11963. CrossRefGoogle Scholar
  55. Wilson RM, Chanin L, Hauchecorne A (1991) Gravity waves in the middle atmosphere observed by Rayleigh lidar 2. Climatol J Geophys Res 96:5153–5165CrossRefGoogle Scholar
  56. Yoshiki M, Sato K (2000) A statistical study of gravity waves in the polar regions based on operational radiosonde data. J Geophys Res Atmos 105:17995–18011. CrossRefGoogle Scholar
  57. Yoshiki M, Kizu N, Sato K (2004) Energy enhancements of gravity waves in the Antarctic lower stratosphere associated with variations in the polar vortex and tropospheric disturbances. J Geophys Res D Atmos 109:1–12. CrossRefGoogle Scholar
  58. Zhang F, Wang S, Plougonven R (2004) Uncertainties in using the hodograph method to retrieve gravity wave characteristics from individual soundings. Geophys Res Lett 31:5–9. Google Scholar
  59. Zink F, Vincent RA (2001a) Wavelet analysis of stratospheric gravity wave packets over Macquarie Island: 1. Wave parameters. J Geophys Res Atmos 106:10275–10288CrossRefGoogle Scholar
  60. Zink F, Vincent RA (2001b) Wavelet analysis of stratospheric gravity wave packets over Macquarie Island: 2. Intermittency and mean-flow accelerations. J Geophys Res Atmos 106:10289–10297. CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Space Physics LaboratoryVikram Sarabhai Space CentreThiruvananthapuramIndia

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