Gisinger S. Gravity waves in the lower atmosphere in mountainous regions and the role of the tropopause: doctoral thesis / Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen. – Köln: DLR, 2018. - xiv, 131 p.: ill., tab. - (Forschungsbericht; 2018-15). - Res. also Germ. - Bibliogr.: p.119-129. - ISSN 1434-8454 Шифр: (Pr 1120/2018-15) 02  Место хранения:   02 | Отделение ГПНТБ СО РАН | Новосибирск

Оглавление / Contents

1 Introduction ............................................... 1 1.1 Atmospheric Gravity Waves .................................. 1 1.2 Mountain Waves ............................................. 3 1.3 Goals and Hypothesis ....................................... 6 2 Theory ..................................................... 9 2.1 Wave Propagation ........................................... 9 2.2 Inversion Effects on Mountain Waves ....................... 17 3 Data and Methods .......................................... 21 3.1 Numerical Models .......................................... 21 3.1.1 EULAG .............................................. 21 3.1.2 ECMWF Numerical Analyses and Forecasts ............. 21 3.2 Gravity Wave Analysis of Radiosonde Data .................. 22 3.2.1 Sensors and Data ................................... 22 3.2.2 Background and Perturbation Profiles ............... 24 3.2.3 Properties and Limits .............................. 26 3.2.4 Methods to determine Gravity Wave Properties from Soundings .......................................... 27 4 Results ..................................................... 33 4.1 Idealized Simulations with EULAG .......................... 33 4.2 Atmospheric Conditions during DEEPWAVE .................... 44 4.2.1 Tropospheric Circulation ........................... 44 4.2.2 Tropopause Layer and Jets .......................... 49 4.3 Gravity Wave Activity and Properties from Radiosonde Data ...................................................... 56 4.3.1 Intertia-Gravity Waves ............................. 58 4.3.2 Non-hydrostatic Mountain Waves ..................... 67 4.3.3 Mountain Wave Cases vs. Non-mountain Wave Case ..... 74 5 Discussion ................................................ 83 5.1 Gravity Wave Sources ...................................... 83 5.2 Impact of the Tropopause .................................. 90 6 Summary and Conclusion .................................... 95 7 Outlook ................................................... 99 A Appendix ................................................. 101 A.l Inertia-GWs .............................................. 101 A.2 Non-hydrostatic MWs ...................................... 112 Acronyms ...................................................... 115 Symbols ....................................................... 117 Bibliography .................................................. 119 Danksagung .................................................... 131