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Cooling by melting precipitation in Alpine valleys: An idealized numerical modelling study

Unterstrasser, Simon and Zängl, Günther (2006) Cooling by melting precipitation in Alpine valleys: An idealized numerical modelling study. Quarterly Journal of the Royal Meteorological Society, 132, pp. 1489-1508. DOI: 10.1256/qj.05.158.

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Abstract

Cooling by melting precipitation in Alpine valleys is investigated. In this case, the latent heat required for melting the falling snow is continuously removed from the valley air until the snowline reaches the valley bottom. Numerical simulations with a highly idealized two-dimensional model indicate an even smaller volume effect, which might be partly due to numerical inaccuracies. We also examined the impact of an air-mass exchange between the upper part of the valley atmosphere and the environment. Our results also suggest that resolving the turbulent eddies that form below the melting layer is important for realizing the volume effect, which implies that mesoscale numerical models with parametrized turbulence will systematically underestimate the cooling effect in Alpine valleys.

Document Type:Article
Title:Cooling by melting precipitation in Alpine valleys: An idealized numerical modelling study
Authors:
AuthorsInstitution or Email of Authors
Unterstrasser, SimonUNSPECIFIED
Zängl, GüntherLMU München
Date:1 July 2006
Journal or Publication Title:Quarterly Journal of the Royal Meteorological Society
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:132
DOI:10.1256/qj.05.158
Page Range:pp. 1489-1508
Status:Published
Keywords:cooling by melting precipitation, Alpine valleys, numerical modelling study
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Air Traffic and Weather (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr. Simon Unterstraßer
Deposited On:19 Jul 2007
Last Modified:11 Nov 2014 21:56

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