Lessons on orographic precipitation from the Mesoscale Alpine Programme

AMS Citation:
Rotunno, R., and R. A. Houze, 2007: Lessons on orographic precipitation from the Mesoscale Alpine Programme. Quarterly Journal of the Royal Meteorological Society, 133, 811-830, doi:10.1002/qj.67.
Date:2007-04-01
Resource Type:article
Title:Lessons on orographic precipitation from the Mesoscale Alpine Programme
Abstract: Although moisture-laden airflow towards a mountain is a necessary ingredient, the results from the Mesoscale Alpine Programme (MAP) demonstrate that detailed knowledge of the orographically modified flow is crucial for predicting the intensity, location and duration of orographic precipitation. Understanding the orographically modified flow as it occurs in the Alps is difficult since it depends on the static stability of the flow at low levels, which is heavily influenced by synoptic conditions, the complex effects of latent heating, and the mountain shape, which has important and complicated variations on scales ranging from a few to hundreds of kilometres. Central themes in all of the precipitation-related MAP studies are the ways in which the complex Alpine orography influences the moist, stratified airflow to produce the observed precipitation patterns, by determining the location and rate of upward air motion and triggering fine-scale motions and microphysical processes that locally enhance the growth and fallout of precipitation. In this paper we review the major findings from the MAP observations and describe some new research directions that have been stimulated by MAP results.
Subject(s):Microphysics, Clouds
Peer Review:Refereed
Copyright Information:Copyright 2007 Royal Meteorological Society.
OpenSky citable URL: ark:/85065/d7x34xqn
Publisher's Version: 10.1002/qj.67
Author(s):
  • Richard Rotunno - NCAR/UCAR
  • Robert Houze
  • Random Profile

    SENIOR SCIENTIST

    Recent & Upcoming Visitors