Initial results of the GW-LCYCLE campaign 2015/16 results on the life cycle of gravity waves from combined airborne and ground based observations

Transcription

1 Initial results of the GW-LCYCLE campaign 2015/16 results on the life cycle of gravity waves from combined airborne and ground based observations Markus Rapp 1,2, Andreas Dörnbrack 1, and Peter Preusse 4 for the GW-LCYCLE-Consortium Sonja GISINGER 1, Bernd KAIFLER 1, Natalie KAIFLER, Benedikt EHARD 1, Christiane VOIGT 1, Romy SCHLAGE 1, Benjamin WITSCHAS 1, Martin WIRTH 1, Hans SCHLAGER 1, Carsten SCHMIDT 3, Patrick HANNAWALD 3, Sabine WÜST 3, Michael BITTNER 3, Isabell KRISCH 4, Hermann OELHAF 5, Wolfgang WOIWODE 5, Gerd BAUMGARTEN 6, Jorge CHAU 6, Franz-Josef LÜBKEN 6, Peter HOOR 7, Jörg GUMBEL 8, Rigel KIVI 9, Dominque PAUTET 10, Mike TAYLOR 10 1 Deutsches Zentrum für Luft-und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany 2 Meteorologisches Institut München, Ludwig-Maximilian-Universität München, Munich, Germany 3 Deutsches Zentrum für Luft-und Raumfahrt, Earth Observation Center, Oberpfaffenhofen, Germany 4 Institute ofenergyandclimateresearch (IEK-7: Stratosphere) Forschungszentrum Jülich, Jülich, Germany, Germany 5 Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research, Eggenstein-Leopoldshafen, Germany 6 Leibniz-Institut für Atmosphärenphysik an der Universität Rostock, Kühlungsborn, Germany 7 Institute for Atmospheric Physics, University Mainz, Mainz, Germany 8 Department of Meteorology, Stockholm University, Stockholm, Sweden 9 Finnish Meteorological Institute, Arctic ResearcCentre, Sodankylä, Finland 10 Utah State University,Department of Physics and Center for Atmospheric and Space Science, Logan UT, USA

2 Overview: the GW-LCYCLE-project

3 Challenges and Scientific Objectives Better understanding of o GW-sources o GW-propagation to the MA o GW-Dissipation o Wave-Mean Flow interaction Input for improved GW-paramet. Kim et al., 2003

4 GW-LCYCLE: observational concept

5 The GW-LCYCLE campaign in January/March 2016: initial results

6 ROMIC - Field Campaigns (1) GW-LCYCLE December 2013, Kiruna, Sweden - DLR Falcon - radiosonde launches at various stations - ground-based observations at various stations (2) DEEPWAVE (NSF-led with DLR contribution) - 6 June 22 July 2014, New Zealand - DLR Falcon - ground-based observations (Lidar, radiosondes) at Lauder Photo: Petr Horalek (3) GW-LCYCLE 2 - winter 2015/2016, Kiruna, Sweden - coordinated flights of HALO and Falcon - radiosonde launches at var. stations - ground-based observations at var. stations

7 Ground based measurements Kaifler RMR & Fe Lidar MAARSY, Radars Radiosondes LITOS AMTM GRIPS14 ESRANGE Lidar Radiosondes AMTM GRIPS9, FAIM3 CORAL Lidar AMTM Radiosondes

8 Airborne measurements HALO trace gases P. Preusse Falcon GLORIA trace gases in-situ (u,v,w,p) airglow imager GRIPS upward looking H2O-Lidar downward looking wind-lidar in-situ (u,v,w,p)

9 Observations during GW-LCYCLE 2 Sodankylä CORAL Lidar Sodankylä RS ESRANGE Lidar Kirina RS Kiruna LITOS RMR Lidar Fe Lidar MAARSY Andenes RS Kiruna LITOS Falcon HALO B. Kaifler 11 Jan 31 Jan + an Event on 15. Feb (Esrange Lidar, Lidar Sodankylä, Radiosondes) + an Event on 29. Feb (HALO, Esrange Lidar, Lidar Sodankylä, Radiosondes)

10 The GW-LCYCLE campaign in January/March 2016: initial results a) Groundbased lidar observations

11 Ground based observations with the DLR- Rayleigh-Lidar at Sodankylä, Finland First campaign of CORAL (COmpact Rayleigh Autonomous Lidar) Oct 2016 March 2017 ~700 hours of semi-autonomous operation Temperature profiles km with 10 min resolution 2d airglow observations (temperature) with AMTM

12 Nightly Mean Temperature Profiles 62 nights with >2 hours per night courtesy: B. Kaifler, DLR

13 Gravity Wave/ Mountain Wave Activity Mean Profiles 2016 courtesy: B. Kaifler, DLR Sodankylä: Mountain waves penetrate into lower mesosphere

14 The GW-LCYCLE campaign in January/March 2016: initial results b) Airborne observations

15 Airborne GW-observations during GW-LCYCLE2 HALO (31 flight hours) Falcon (35 flight hours) 1 Marble A. Minikin 3 MWs over Iceland 4 weak MWs under easterly flow Spitsbergen 5 weak orographic forcing, waves in lidar data 6 MWs and jet-exit region Greenland 7 MWs, deep propagation 7 1 GWs with weak and no orographic forcing, with and without polar night jet (PNJ) + comparison ground and airborne obs + other events captured by ground based instruments 2 moderate and transient MW event

16 vertical direction (128 pixels) GLORIA horizontal direction (typ. 48 pixels) GLORIA-GW-Results, e.g., GW generation by Rossby waves Talk by Isabell Krisch

17 Airglow Camera FAIM on Falcon Preliminary 87 km altitude km 20 km P. Hannawald source: German Aerospace Center German Remote Sensing Data Center - Atmosphere

18 : 15 Min excerpt ca. 21 Ost bis 17 Ost Rohbilder flight track (Farbe ~ Airglow-Intensität, blau=dunkel) Differenzbilder

19 DLR.de Folie 19 > Vortrag > Autor Dokumentname > Datum : 15 Min Auszug ca. 21 Ost bis 17 Ost Rohbilder flight track (Farbe ~ Airglow-Intensität, blau=dunkel) Differenzbilder Objectives for further scientific analysis: E.g., Morphology of GW-activity relative to the position of the polar night jet

20 Airborne observations: Coordinated observations with DLR-Falcon and HALO

21 Coordinated Falcon and HALO flight on mountain induced GWs over Southern Scandinavia ECMWF hpa

22 Coordinated Falcon and HALO flight (RF-08 Leg 1) Falcon at 9.8 km altitude (PGS-11 Leg 1) HALO at 7.8 km altitude Falcon M. Bramberger, T. Portele, M. Siller in-situ HALO HALO Flightradar24.com in-situ FALCON HALO in-situ HALO 1 2 1,3 4, km 10 km 6 km 2 km Altitude

23 Aircraft in-situ 7.8 km 9.8 km 13.8 km Preliminary M. Bramberger, T. Portele, M. Siller w w w u, v u, v u, v T T T East West East West West East

24 Example: combined flight Falcon and HALO Leg km Upward propagating (linear) mountain wave

25 vertical wind Wind lidaron Falcon Falcon in-situ 1.5 ~ 8 km m/s no backscatter west agreement between in-situ and lidar different wave structures below and above tropopause (TP) horizontal wavelength from wavelet analysis below TP spectral max λ h > 10 km, above TP spectral max λ h < 10 km east B. Witschas, DLR

26 vertical wind Wind lidaron Falcon Falcon in-situ 1.5 ~ 8 km m/s Objectives for further scientific analysis: no backscatter E.g., GW-propagation across the tropopause west agreement between in-situ and lidar different wave structures below and above tropopause (TP) horizontal wavelength from wavelet analysis below TP spectral max λ h > 10 km, above TP spectral max λ h < 10 km east B. Witschas, DLR

27 (c) Kaifler Summary and Outlook Various GW situations were observed during GW-LCYCLE 2 with ground based and airborne instruments Northern & Southern Scandinavia, Norwegian Sea Iceland, Spitsbergen, Greenland Italy, Malta Combining all the measurements allows to study GW excitation, propagation and dissipation Identify the contributions of the different possible sources for different cases, e.g. orography, jet exit regions, fronts, convection in polar lows, Next: HALO/Falcon NAWDEX-campaign in Sep/Oct 2017 (c) Gisinger (c) Gisinger

28 Thanks for your attention! Foto: Tina Jurkat, DLR