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Extrapolation of the Goff-Gratch Formula for Vapor Pressure of Liquid Water at Temperatures Below 0°C
Publisher: American Meteorological Society
Abstract: Indirect justification for extrapolating the Goff-Gratch formula for saturation vapor pressure over liquid water to temperatures as low as ?60°C has been obtained during a recent study of ice nucleation on aerosol particles ...
Radiative Heating Profiles in Simple Cirrus Cloud Systems
Publisher: American Meteorological Society
Abstract: Results from one-dimensional cirrus cloud model simulations in the absence of upward velocities are used to show that the growth/sublimation of the ice particles in the cloud, and the fact that they are falling, can be ...
Reduction of Residential Heating and Cooling Requirements Possible Through Atmospheric Seeding with Ice-Forming Nuclei
Publisher: American Meteorological Society
Abstract: A rough analysis shows that it may be economically feasible to reduce space heating costs during the cold season in the northern United States by modifying naturally-occurring cloud cover, or by artificially forming clouds ...
Initiation of Freezing in Supercooled Cloud Droplets by Ionizing Radiation
Publisher: American Meteorological Society
Abstract: Experiments conducted in a laboratory cloud chamber at ?15°C show no significant initiation of freezing in supercooled cloud droplets when they are penetrated by 5.3 MeV alpha particles emitted by a 500 ?Ci 210>Po source.
Air Motion Characteristics in the Anvil of a Severe Thunderstorm during CCOPE
Publisher: American Meteorological Society
Abstract: An analysis of aircraft-measured data obtained in the lower portion of a High Plains thunderstorm anvil is presented. A ?wind shadow? is still evident 5 to 7 core diameters downstream of the storm core. The wind fluctuations ...
The M-Meter: A Simple Airborne Hydrometeor Measurement Instrument
Publisher: American Meteorological Society
Abstract: The M-meter is designed to measure total mass concentration of hydrometeors from aircraft aloft. Its essence is a free-rotating, vaned disk with face normal to the freestream; rotation is driven by airflow through the ...
Humidity Required for Ice Nucleation from the Vapor onto Silver Iodide and Lead Iodide Aerosols over the Temperature Range −6 to −67°C
Publisher: American Meteorological Society
Abstract: The ice saturation ratio at which 1% of aged silver iodide and lead iodide aerosol particles nucleate ice from moist air is observed to depend on temperature. Between roughly ?30 and ?67°C the threshold for both aerosol ...
Investigation of the Variability of Cloud Condensation Nuclei Concentrations at the Surface in Western North Dakota
Publisher: American Meteorological Society
Abstract: Daily observations of cloud condensation nuclei (CCN) were made for three summer months in 2005 at a site in rural western North Dakota. The goal was to define the natural background CCN population characteristics and to ...
A Case Study of the Origin of Hail in a Multicell Thunderstorm Using In Situ Aircraft and Polarimetric Radar Data
Publisher: American Meteorological Society
Abstract: An armored T-28 research aircraft made direct observations of the hydrometeors present at approximately the ?3°C temperature level in the inflow region of a multicell thunderstorm. During the penetration, both the Colorado ...