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RISDoppler-Radar Measurements of Clear Air Atmospheric Turbulence at 1290 MHz
Publisher: American Meteorological Society
Abstract: We present Doppler-radar observations for the refractivity turbulence structure constant CN2 obtained with the Chatanika Radar Facility, near Fairbanks, Alaska, during a 7-day observing period in October 1976. We find that ...
Mountain Waves in the Tropical Pacific Atmosphere: A Comparison of Vertical Wind Fluctuations over Pohnpei and Christmas Island Using VHF Wind Profilers
Publisher: American Meteorological Society
Abstract: We compare vertical wind fluctuations observed by VHF radar wind profilers in the tropical troposphere over a large, mountainous island (Pohnpei, at 7°N, 158°E) and a large, low-profile atoll (Christmas Island, at 2°N, ...
On the Use of Slow Ascent Meter-Scale Sampling (SAMS) Radiosondes for Observing Overturning Events in the Free Atmosphere
Publisher: American Meteorological Society
Abstract: This note describes the development of a method for obtaining high vertical resolution (meter scale) measurements of basic meteorological quantities and turbulent overturns, using radiosondes with slow ascent rates. Although ...
Long-Term Average Vertical Motions Observed by VHF Wind Profilers: The Effect of Slight Antenna-Pointing Inaccuracies
Publisher: American Meteorological Society
Abstract: This paper shows that a very slight tilt of the vertically directed antenna beam of a VHF wind profiler can produce a measurable change in the observed long-term averaged ?vertical? velocity profiles. The results are based ...
High-Resolution Atmospheric Sensing of Multiple Atmospheric Variables Using the DataHawk Small Airborne Measurement System
Publisher: American Meteorological Society
Abstract: he DataHawk small airborne measurement system provides in situ atmospheric measurement capabilities for documenting scales as small as 1 m and can access reasonably large volumes in and above the atmospheric boundary layer ...
The VHF Doppler Radar as a Tool for Cloud and Precipitation Studies
Publisher: American Meteorological Society
Abstract: The VHF Doppler radar has become a powerful tool for probing structures and motions of the clear air. In this paper, we discuss the capability of VHF radar as a tool for cloud and precipitation studies. Large fluctuations ...
The Effects of Critical Layers on Residual Layer Turbulence
Publisher: American Meteorological Society
Abstract: The authors report results of a study of finescale turbulence structure in the portion of the nocturnal boundary layer known as the residual layer (RL). The study covers two nights during the Cooperative Atmosphere?Surface ...
Turbulence Measurements with the CIRES Tethered Lifting System during CASES-99: Calibration and Spectral Analysis of Temperature and Velocity
Publisher: American Meteorological Society
Abstract: Finescale temperature and velocity measurements with multiple vertically spaced cold-wire and hot-wire sensors on the Cooperative Institute for Research in the Environmental Sciences (CIRES) tethered lifting system (TLS) ...
A Statistical Description of Small-Scale Turbulence in the Low-Level Nocturnal Jet
Publisher: American Meteorological Society
Abstract: The probability density function (PDF) and spatial statistics of both the energy dissipation rate ? and the temperature structure constant C2T are determined for the shear region of a nocturnal jet. The PDF of ? and C2T ...
Measurements of Boundary Layer Profiles in an Urban Environment
Publisher: American Meteorological Society
Abstract: Boundary layer profiles of mean temperature, velocity, and small-scale turbulence from in situ sensors, Doppler lidar, sodar, and rawinsondes are intercompared for an urban environment. A new Doppler lidar algorithm is ...