contributor author | Lehner, Manuela | |
contributor author | Rotunno, Richard | |
contributor author | Whiteman, C. David | |
date accessioned | 2017-06-09T16:59:46Z | |
date available | 2017-06-09T16:59:46Z | |
date copyright | 2016/10/01 | |
date issued | 2016 | |
identifier issn | 0022-4928 | |
identifier other | ams-77602.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4220179 | |
description abstract | dealized two-dimensional model simulations are performed to study the frequent nocturnal occurrence of downslope-windstorm-type flows in Arizona?s Meteor Crater. The model topography is a simplified representation of the Meteor Crater and its surroundings, with an approximately 1° mesoscale slope upstream and downstream of the crater basin. A strong surface-based inversion and a katabatic flow develop above the mesoscale slope as a result of radiational cooling. The temperature and flow profiles are evaluated against observations over low-angle slopes from two field campaigns, showing that the model?s turbulence parameterization has a strong impact on the near-surface conditions. The interaction of the katabatic flow with the basin topography leads to the formation of waves and hydraulic jumps over the basin. The simplified two-dimensional simulations show good qualitative agreement with observations of downslope-windstorm-type flows from the Meteor Crater. The sensitivity of the flow solution over the basin to basin depth, basin width, and background wind speed is investigated. The resulting flow regimes include a sweeping of the basin atmosphere, a wake over the upstream crater sidewall, waves over the basin with one or two wave crests, and a hydraulic jump. The regimes are discussed in the context of stratified flow over mountains. | |
publisher | American Meteorological Society | |
title | Flow Regimes over a Basin Induced by Upstream Katabatic Flows—An Idealized Modeling Study | |
type | Journal Paper | |
journal volume | 73 | |
journal issue | 10 | |
journal title | Journal of the Atmospheric Sciences | |
identifier doi | 10.1175/JAS-D-16-0114.1 | |
journal fristpage | 3821 | |
journal lastpage | 3842 | |
tree | Journal of the Atmospheric Sciences:;2016:;Volume( 073 ):;issue: 010 | |
contenttype | Fulltext | |