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RISAn Analysis of the Structure of Local Wind Systems in a Broad Mountain Basin
Publisher: American Meteorological Society
Abstract: In the traditional model of ridge-valley winds, there are typically two wind regimes on a dry day: a downslope, drainage wind at night due to cooling at the surface along the slopes, and an upslope wind during the day due ...
Parameterization of the Atmospheric Surface Layer
Publisher: American Meteorological Society
Abstract: A parameterization of the constant flux surface layer is developed in order to provide boundary conditions for numerical models of the atmospheric boundary layer and moist convective layer. Algebraic expressions are found ...
The Relationship between Drop In-Cloud Residence Time and Drizzle Production in Numerically Simulated Stratocumulus Clouds
Publisher: American Meteorological Society
Abstract: This paper considers the production of drizzle in statocumulus clouds in relation to the boundary-layer turbulent kinetic energy and in-cloud residence times. It is shown that drizzle production in statocumulus of the order ...
Development of an Aerosol Retrieval Method: Description and Preliminary Tests
Publisher: American Meteorological Society
Abstract: A cloud-nucleating aerosol retrieval method was developed. It allows the estimation of ice-forming nuclei and cloud condensation nuclei (IFN and CCN) for regions in which boundary layer clouds prevail. The method is based ...
Numerical Simulation of Tornadogenesis in a High-Precipitation Supercell. Part I: Storm Evolution and Transition into a Bow Echo
Publisher: American Meteorological Society
Abstract: A nested grid primitive equation model (RAMS version 3b) was used to simulate a high-precipitation (HP) supercell, which produced two weak tornadoes. Six telescoping nested grids allowed atmospheric flows ranging from the ...
An Intense, Quasi-Steady Thunderstorm over Mountainous Terrain. Part I: Evolution of the Storm-Initiating Mesoscale Circulation
Publisher: American Meteorological Society
Abstract: A detailed, multisensor case study of mesoscale convective storms occurring in summer over the central and eastern Colorado Rockies is presented. This case study uses data obtained during the 1977 South Park Area Cumulus ...
Impact of Aerosol Intrusions on Arctic Boundary Layer Clouds. Part I: 4 May 1998 Case
Publisher: American Meteorological Society
Abstract: The objective of this paper is to assess the impact of the entrainment of aerosol from above the inversion on the microphysical structure and radiative properties of boundary layer clouds. For that purpose, the Los Alamos ...
Feasibility of Retrieving Cloud Condensation Nucleus Properties from Doppler Cloud Radar, Microwave Radiometer, and Lidar
Publisher: American Meteorological Society
Abstract: This paper explores the possibilities of using Ka-band Doppler radar, microwave radiometer, and lidar as a means of retrieving cloud condensation nucleus (CCN) properties in the stratocumulus-capped marine boundary layer. ...
Impact of Aerosol Intrusions on Arctic Boundary Layer Clouds. Part II: Sea Ice Melting Rates
Publisher: American Meteorological Society
Abstract: The potential impact of intrusions of polluted air into the Arctic basin on sea ice melting rates and the surface energy budget is examined. This paper extends a previous study to cloud-resolving simulations of the entire ...
Effects of Aerosol and Horizontal Inhomogeneity on the Broadband Albedo of Marine Stratus: Numerical Simulations
Publisher: American Meteorological Society
Abstract: Recent estimates of the effect of increasing amounts of anthropogenic sulfate aerosol on the radiative forcing of the atmosphere have indicated that its impact may be comparable in magnitude to the effect from increases ...