Slide 1

Markus Rapp and Franz-Josef Lbken Leibniz-Institut fr Atmosphrenphysik (IAP) an der Universitt Rostock Khlungsborn Stefanos Fasoulas Institut fr Raumfahrtsysteme (IRS), Universitt Stuttgart WADIS - Wave propagation and dissipation in the middle Atmosphere: Energy budget und distribution of trace gases funded by DLR- Space Agency: 2010 - 2013 Slide 2 Motivation Slide 3 0 km 50 km 100 km Model: Erich Becker, IAP Sommer Winter Sommer Winter Residual Circulation because of wave-mean flow interaction: Small scale dynamics (Waves and Turbulence) affects global fields Slide 4 Open issues Slide 5 Propagation issues Winter:Existing techniques for wind measurements: Sommer: WADIS will use all of these methods at the same time! Slide 6 Criteria for instabilities? Paradigm: A wave/flow turns unstable -Static instability (heavy air above light air) -Dynamic instability (large wind shear) Characterized by vertical distribution of T, u !!! Slide 7 Criteria for instabilities? Achatz, Adv. Space Res. 2007 Slide 8 Influence on trace gas distributions Source: Photolysis of O 2 in SR-Band (175-205nm) and SR-Continuum (137-175nm) Sink: 3-body recombination O+O+M -> O 2 + M O+O 2 +M -> O 3 + M Slide 9 Contribution to the energy budget Mlynczak (1996) Dissipation of GW Exothermal reactions of O Photolysis of O 2 Slide 10 Aims of WADIS Measurement of the propagation and dissipation of GW in the range 0 100km Quantify the contribution of these waves to the energy budget First educated guesses on horizontal structures of turbulence Quantify the contribution of O to the energy budget (Determine the deactivation rate of CO 2 * (15 m) + O by comparison to satellite IR-data) Slide 11 Experimental Concept Slide 12 General concept 2 Campaigns: 1x winter (Jan./Feb. 2012), 1x spring transition (April/May 2013) Per Campaign: 1 Salvo consisting of ~10 meteorological rockets for high resolution wind measurements and 1 instrumented rocket for the measurement of densities, temperatures, turbulence and atomic oxygen Combine with unique new ground based facilities (DORIS & MAARSY) Combine with SABER/TIMED overflight Slide 13 The WADIS payload 14 payload with identical instrumentation on front and rear decks Je 1 x CONE, 1 x FIPEX und 1 x PHLUX + small additional instruments Measurements on up- and downleg (first crude horizontal information) Slide 14 Instrumentation Slide 15 CONE (COmbined sensor for Neutrals and Electrons) time constant ~ 1 - 8 ms altitude resolution 10 cm Precision 0.1 % I CONE ~ local neutral density I e ~ local electron density Slide 16 FIPEX and PHLUX: Atomic oxygen Fasoulas et al., 2010 Herdrich et al., 2010 FIPEX Based on electro- chemical processes PHLUX Based on catalytic Properties of materials Slide 17 Instrumentation to study GW@IAP & Collab. Rayleigh-Lidar 100km Summer: PMSE; ~100% Winter: PMWE; >10% Troposp. MAARSY OH-airglow/NLC Meteor/MF-radar Resonance -Lidar Met-rockets Radio-s. Hfr: Turbulence, T Radar-gap