Now showing items 1-10 of 21
Numerical study of the evolving convective boundary layer and orographic circulation around the Santa Catalina Mountains in Arizona, Part I. Circulation without deep convection, A
Author(s):Demko, J. C.; Geerts, Bart
The daytime evolution of the thermally forced boundary layer (BL) circulation over an isolated mountain, about 30 km in diameter and 2 km high, is examined by means of numerical simulations validated with data collected ...
Dispersion of Silver Iodide Particles from Ground-Based Generators Over Complex Terrain, Part II. WRF Large-Eddy Simulations Versus Observations, The
Author(s):Xue, Lulin; Chu, Xia; Rasmussen, Roy; Breed, Daniel; Boe, Bruce; Geerts, Bart
A numerical modeling study has been conducted to explore the ability of the Weather Research and Forecasting (WRF) model-based large-eddy simulation (LES) with 100-m grid spacing to reproduce silver iodide (AgI) particle ...
Numerical study of the evolving convective boundary layer and orographic circulation around the santa catalina mountains in Arizona, Part II. Interaction with deep convection, A
Author(s):Geerts, Bart; Parish, T. R.
This is the second part of a study that examines the daytime evolution of the thermally forced boundary layer (BL) circulation over a relatively isolated mountain, about 30 km in diameter and 2 km high, and its interaction ...
Evaluating Winter Orographic Cloud Seeding : Design of the Wyoming Weather Modification Pilot Project (WWMPP)
Author(s):Breed, D.; Rasmussen, R.; Weeks, C.; Boe, B.; Deshler, Terry
An overview of the Wyoming Weather Modification Pilot Project (WWMPP) is presented. This project, funded by the State of Wyoming, is designed to evaluate the effectiveness of cloud seeding with silver iodide in the Medicine ...
Condensation Nuclei Measurements in the Midlatitude (1982-2012) and Antarctic (1986-2010) Stratosphere between 20 and 35 km
Author(s):Campbell, P.; Deshler, Terry
Balloon-borne stratospheric condensation nuclei (CN) measurements have been made from McMurdo Station, Antarctica (78°S), 1986-2010, and from Laramie, Wyoming (41°N), 1982 to the present. In the Antarctic region, the ...
Boundary layer turbulence and orographic precipitation growth in cold clouds : Evidence from profiling airborne radar data
Author(s):Geerts, Bart; Miao, Qun; Yang, Yang
Airborne vertically pointing Doppler radar data collected in 10 winter storms over the Medicine Bow Range in Wyoming are used to examine the importance of boundary layer (BL) turbulence for orographic precipitation growth. ...
Airborne profiling radar study of the impact of glaciogenic cloud seeding on snowfall from winter orographic clouds, An
Author(s):Geerts, Bart; Miao, Q.; Yang, Y.; Rasmussen, R.; Breed, D.
Data from an airborne vertically pointing millimeter-wave Doppler radar are used to study the cloud microphysical effect of glaciogenic seeding of cold-season orographic clouds. Fixed flight tracks were flown downstream ...
Observation of Playa Salts as Nuclei in Orographic Wave Clouds
Author(s):Pratt, K. A.; Twohy, C. H.; Murphy, Shane; Moffet, R. C.; Heymsfield, A. J.; Gaston, C. J.; Demott, P. J.; Field, P. R.; Henn, T. R.; Rogers, D. C.; Gilles, M. K.; Seinfeld, J. H.; Prather, K. A.
During the Ice in Clouds Experiment-Layer Clouds (ICE-L), dry lakebed, or playa, salts from the Great Basin region of the United States were observed as cloud nuclei in orographic wave clouds over Wyoming. Using a counterflow ...
Coastal Jet Adjustment Near Point Conception, California, with Opposing Wind in the Bight
Author(s):Rahn, David A.; Parish, Thomas R.; Leon, Dave
Typical spring and summer conditions offshore of California consist of strong northerly low-level wind contained within the cool, well-mixed marine boundary layer (MBL) that is separated from the warm and dry free troposphere ...
Testing Cloud Microphysics Parameterizations in NCAR CAM5 with ISDAC and M-PACE Observations
Author(s):Liu, Xiaohong; Xie, Shaocheng; Boyle, James; Klein, Stephen A.; Shi, Xiangjun; Wang, Zhien; Lin, Wuyin; Ghan, Steven J.; Earle, Michael; Liu, Peter S. K.; Zelenyuk, Alla
Arctic clouds simulated by the National Center for Atmospheric Research (NCAR) Community Atmospheric Model version 5 (CAM5) are evaluated with observations from the U.S. Department of Energy (DOE) Atmospheric Radiation ...