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AHATS
Advection Horizontal Array Turbulence Study
| What | Field Deployment Today at EOL |
|---|---|
| When |
2008-06-30 00:00
to 2008-08-08 00:00 |
| Where | San Joaquin Valley, California |
| Contact Name | Steve Oncley |
| Contact Email | oncley@ucar.edu |
| Contact Phone | 303-497-8757 |
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AHATS is the fourth in the series of Horizontal Array of Turbulence Studies (HATS). This series of experiments aims to improve large-eddy simulations (LES) of turbulence close to the Earth's surface, by collecting data that can be spatially filtered into scales that can be simulated by LES and those that must be parametrized.
These experiments are:
| Year |
Name |
Location |
Surface |
# of anemometers |
|---|---|---|---|---|
| 2000 | HATS | Kettleman City, CA | fallow land | 19 |
| 2004 | OHATS | Martha's Vineyard, MA | over-ocean platform | 19 |
| 2007 | CHATS | Dixon, CA | inside a walnut orchard canopy | 30 |
| 2008 | AHATS | Kettleman City, CA | fallow land | 33 |
The first 3 experiments all used two horizontal lines of 9 sonic anemometers to provide cross-stream filtered velocity and temperature statistics.
AHATS returns to the original HATS site, but a third line has been added upwind to provide spatial differences in the streamwise direction. In addition, two horizontal lines of turbulent pressure sensors are being added to AHATS to investigate, for the first time, resolved and parameterized pressure correlation terms in the turbulence transport equations. Those capabilities were
unavailable in previous field programs but are important for
understanding the SGS turbulence and for testing SGS models that are
based on the SGS physics. The project, which is lead by C. Tong from
Clemson University, will deploy one ISFF and one ISS in San Joaquin
Valley in California during a eight week time span between May to
August 2008.