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The Alpine mountain-plain circulation: Airborne Doppler lidar measurements and numerical simulations

Weissmann, Martin und Braun, Frank J. und Gantner, Leonhard und Mayr, Georg J. und Rahm, Stephan und Reitebuch, Oliver (2005) The Alpine mountain-plain circulation: Airborne Doppler lidar measurements and numerical simulations. Monthly Weather Review, 133, Seiten 3095-3109. DOI: 10.1175/MWR3012.1.

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Offizielle URL: http://ams.allenpress.com/amsonline/?request=get-abstract&doi=10.1175%2FMWR3012.1

Kurzfassung

On summer days radiative heating of the Alps produces rising air above the mountains and a resulting inflow of air from the foreland. This leads to a horizontal transport of air from the foreland to the Alps, and a vertical transport from the boundary layer into the free troposphere above the mountains. The structure and the transports of this mountain–plain circulation in southern Germany (“Alpine pumping”) were investigated using an airborne 2-μm scanning Doppler lidar, a wind-temperature radar, dropsondes, rawinsondes, and numerical models. The measurements were part of the Vertical Transport and Orography (VERTIKATOR) campaign in summer 2002. Comparisons of dropsonde and lidar data proved that the lidar is capable of measuring the wind direction and wind speed of this weak flow toward the Alps (1–4 m s<sup>-1</sup>). The flow was up to 1500 m deep, and it extended 80 km into the Alpine foreland. Lidar data are volume measurements (horizontal resolution 5 km, vertical resolution 100 m). Therefore, they are ideal for the investigation of the flow structure and the comparison to numerical models. Even the vertical velocities measured by the lidar agreed with the mass budget calculations in terms of both sign and magnitude. The numerical simulations with the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) (mesh size 2 and 6 km) and the Local Model (LM) of the German Weather Service (mesh size 2.8 and 7 km) reproduced the general flow structure and the mass fluxes toward the Alps within 86%–144% of the observations.

Dokumentart:Zeitschriftenbeitrag
Titel:The Alpine mountain-plain circulation: Airborne Doppler lidar measurements and numerical simulations
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Weissmann, MartinNICHT SPEZIFIZIERT
Braun, Frank J.FZ Karlsruhe, Karlsruhe
Gantner, LeonhardUniv. of Munich, München
Mayr, Georg J.Univ. Innsbruck, Innsbruck, A
Rahm, StephanNICHT SPEZIFIZIERT
Reitebuch, OliverNICHT SPEZIFIZIERT
Datum:November 2005
Erschienen in:Monthly Weather Review
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:133
DOI :10.1175/MWR3012.1
Seitenbereich:Seiten 3095-3109
Status:veröffentlicht
Stichwörter:VERTIKATOR, thermally driven wind, numerical simulation, MM5, LM, Doppler lidar
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Projekt ADM II (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Lidar
Hinterlegt von: Martin Weissmann
Hinterlegt am:19 Mär 2008
Letzte Änderung:11 Nov 2014 21:56

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