Sampling the Ground Layer of the Atmosphere at Dome C using fast Sonic-anemometers
نویسندگان
چکیده
The ground layer turbulence at Dome C is the cause for more than 90% of the total turbulence column. While the height of this layer has been currently measured to be approximately 30m, no long term statistics is available from this part of the atmosphere. In order to plan the construction of future telescope at this site temperature site, temperature, wind speed and turbulence measurements are also necessary. Using fast sonic‐anemometers we present, a preliminary set of data covering January to October 2007 sampling these quantities at heights of 8, 16 and 28 meters.
منابع مشابه
Low atmosphere turbulence at Dome C preliminary results
We discuss the first two months of low altitude atmospheric turbulence at the Antarctic site of Dome C. Using a mini-SODAR, the first 890m of the atmosphere were sampled. It was found that between 9 Feb and 17 Apr 2003, the turbulence was concentrated below a 120m boundary layer that exhibited a clear diurnal cycle. This boundary layer height is less than half as thick as that at the South Pole...
متن کاملConcept for a second Giant Magellan Telescope (GMT) in Antarctica
While definitive winter measurements for Dome C must await until 2004, on the basis of existing data the Antarctic Dome sites promise the best conditions on the Earth for many astronomical observations. Because atmospheric turbulence is largely confined to a ~ 100 m ground layer, adaptive correction with a single deformable mirror conjugated to this layer should yield an 8-arcminute field of vi...
متن کاملMeasurements of Wake Vortices Interacting with the Ground
Although wake vortices are known to decay more rapidly near the ground than away from the ground, the details of the ground interaction are not well understood. Propeller anemometer arrays located under the approach path have been used to study vortex transport and provide some information about the vortex interaction with the ground, such as the generation of secondary vortices via boundary-la...
متن کاملOvercoming the Boundary Layer Turbulence at Dome C: Ground-Layer Adaptive Optics versus Tower
The unique atmospheric conditions present at sites such as Dome C on the Antarctic plateau are very favorable for high spatial resolution astronomy. At Dome C, the majority of the optical turbulence is confined to a 30 to 40 m thick stable boundary layer that results from the strong temperature inversion created by the heat exchange between the air and the ice-covered ground. To fully realize t...
متن کاملShipboard Turbulence Measurements of the Marine Atmospheric Boundary Layer from Hires Experiment
In-situ instruments were installed on 12 m high masts at the bow (bow mast) and the crow nest (middle of the ship, ship mast). The principal sensors installed on each mast were: CSAT-3 sonic anemometer and a CS7500 LiCor LI7500 open path H20/CO2 analyzer/hygrometer. The bulk meteorology sensors were mean temperature and humidity sensors in aspirator and 2-D sonic anemometers for mean wind. Data...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008