Concept information
Preferred term
CASES-99
Definition
- The concept of CASES-99 was borne out of a scientific interest in stable atmospheric conditions. The stable atmosphere, due to its generally weak or intermittent turbulence (`bursting'), is the source of a number of outstanding problems in atmospheric science, agricultural meteorology, and signal propagation, amongothers. As such, CASES-99 focussed it's Intense Observing Periods during the clear sky, light near-surface wind, nocturnal boundary layer (NBL) conditions, which are conducive to stable (Ri > 0.25) and very stable conditions (Ri > 1.0). There are also significant components that will study the transition periods (from daytime, unstable to nighttime, stable conditions and vice-versa). The experimental period was from October 1-31, 1999 near Leon, Kansas (50 km) east of Wichita, Kansas with a 3 day intercomparison and instrument testing period from September 27-30. This area was chosen for CASES-99 due to its relative lack of obstacles, relatively flat terrain (average slopes are 0.5 degrees), and reasonable access to power and phone lines. A large number of instrumentswill be deployed in a an area 4.8 x 3.2 km, to capture stable NBL heterogeneity, with some outlying instrumentation. These instruments include a heavily instrumented 60 m tower, numerous 10 m towers (many with flux measurements), multiple radars, lidars, scintillometers, tethersondes, rawinsondes and research aircraft. See the experimental design for details. CASES-99 was a very successful experiment and essentially all of our scientific goals can be addressed with the data taken. The data is stored for public use (no password protection) in the UCAR JOSS CASES-99 Data Archive . The Archive contains quality-controlled data complete with timestamps in UTC and descriptions of the data therein, listed by data platform. For more information, link to "http://www.colorado-research.com/cases/CASES-99.html" (en)
Broader concept
- A - C (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/2e2c64fa-0b00-426f-a280-37bf07eea560
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