elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Observation of the airflow over the Alps during a foehn event

Hoinka, Klaus-Peter (1985) Observation of the airflow over the Alps during a foehn event. Quarterly Journal of the Royal Meteorological Society, 111, pp. 199-224. Wiley. DOI: 10.1002/qj.49711146709 ISSN 0035-9009

[img] PDF
1MB

Official URL: http://onlinelibrary.wiley.com/doi/10.1002/qj.49711146709/pdf

Abstract

A detailed analysis is presented of the large-scale, mesoscale and local features of a south-foehn event in the Alps on 8 November 1982. On this day, with a substantial cross-mountain flow, instrumented aircraft made programmed flights back and forth across the Alps between southern Germany and northern Italy. Rawinsonde observations were used to complete the data set. A mesoscale double mountain wave with an amplitude of 1 km was found in the upper troposphere, In the mid troposphere above the Inn valley a rather pronounced wave with an amplitude of 2 km and a wavelength of 50 km was analysed. This wave was close to overturning. The foehn turned out to be accompanied by low wave drag at high levels and with strong wave drag at lower levels. Downward southerly (westerly) momentum flux was evaluated to be 0.3 (0.1) Pa. Mountain drag was estimated to be between 1.6 and 6.7Pa. Light to moderate turbulence was observed immediately to the lee in a low-level turbulence zone over the region of strong gusty surface winds. Finally, special attention has been devoted to the similarities and possible differences between foehn in the Alps and chinook in the Rocky Mountains.

Item URL in elib:https://elib.dlr.de/111836/
Document Type:Article
Title:Observation of the airflow over the Alps during a foehn event
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoinka, Klaus-PeterDLR, IPAUNSPECIFIED
Date:1985
Journal or Publication Title:Quarterly Journal of the Royal Meteorological Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:111
DOI :10.1002/qj.49711146709
Page Range:pp. 199-224
Publisher:Wiley
ISSN:0035-9009
Status:Published
Keywords:mesoscale observations; aircraft observations; momentum flux
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: Volkert, Dr. Hans
Deposited On:07 Apr 2017 11:31
Last Modified:31 Jul 2019 20:09

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.