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RISObservations of Cloud-Top Entrainment in Cumuli
Publisher: American Meteorological Society
Abstract: Sulfur hexafluoride tracer gas was released during single aircraft passes just above growing convective turrets to study its entrainment into the clouds as they grew through the release altitude. The tracer was sampled in ...
In Situ Measurements and Observations of Cumulonimbus Mamma
Publisher: American Meteorological Society
Abstract: The results from an instrumented aircraft penetration of two mamma elements associated with a severe hailstorm are presented. Maximum downdrafts in the clouds were near 2 m s?1. The main downdraft region was warmer than ...
Observations of the Effects of Entrainment and Mixing on the Droplet Size Spectra in a Small Cumulus
Publisher: American Meteorological Society
Abstract: Sulfur hexafluoride was released at the base of a small nonprecipitating warm cumulus to study cloud mixing and entrainment processes. The tracer gas traveled to the top of the cloud where, during a 2.5 min period, it had ...
Applications of Fast Response Continuous SF6 Analyzers to In Situ Cloud Studies
Publisher: American Meteorological Society
Abstract: The airborne applications of two recently developed analyzers for sulfur hexafluoride (SF6) to investigations of cloud top mixing and cloud seeding are described. The analyzers were developed by AeroVironment (AV) and by ...
Observations of Quasi-Symmetric Echo Patterns in Clear Air with the CSU–CHILL Polarimetric Radar
Publisher: American Meteorological Society
Abstract: On a few occasions during the summer and fall of 2002, and again in the fall of 2003, the Colorado State University (CSU)?University of Chicago?Illinois State Water Survey (CHILL) S-band polarimetric Doppler radar observed ...
Characteristics of Strong Updrafts in Precipitation Systems over the Central Tropical Pacific Ocean and in the Amazon
Publisher: American Meteorological Society
Abstract: Airborne in situ measurements of updrafts in tropical convective storms were analyzed to determine the similarities and differences between updrafts in a tropical continental and a tropical oceanic region. Two hundred ...
Cloud-Active Nuclei from Coal-Fired Electric Power Plants and Their Interactions with Clouds
Publisher: American Meteorological Society
Abstract: The concentrations of cloud condensation nuclei (CCN) in the plumes from coal-fired electric power plants are generally about 2 to 5 times greater than in the ambient air unaffected by the plumes. However, if the ambient ...
Observations and Model Simulations of Transport and Precipitation Development in a Seeded Cumulus Congestus Cloud
Publisher: American Meteorological Society
Abstract: Observations made by three instrumented aircraft, a Doppler radar, and other data sources were used to follow the initiation and development of precipitation in a small cumulus congestus cloud. The cloud was seeded at its ...
Microphysical Characteristics of Tropical Updrafts in Clean Conditions
Publisher: American Meteorological Society
Abstract: The distributions of ice particles, precipitation embryos, and supercooled water are examined within updrafts in convective clouds in the Amazon and at Kwajalein, Marshall Islands, based on in situ measurements during two ...
Microphysical Observations of Tropical Clouds
Publisher: American Meteorological Society
Abstract: The results from airborne in situ sampling of convective tropical storms in the Amazon and Kwajalein are presented. Three cases from the Amazon and two from Kwajalein are compared and provide examples of the much larger ...