Effective height of a dual-wavelength scintillometer system over complex terrain

Evans, J.G. ORCID:; deBruin, H.A.R.. 2008 Effective height of a dual-wavelength scintillometer system over complex terrain. In: EMS8/ECAC7 Abstracts, 8th Annual Meeting of the EMS / 7th ECAC, Amsterdam, 29 September - 3 October 2008.

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In 2005-2007 a combined Optical & Millimeter-Wave Scintillometer (OMS) system consisting of a large aperture scintillometer (LAS) manufactured by Kipp & Zonen, B.V., Holland, with a light source of 0.88 m and a millimeter-wave scintillometer (MWS) operating at 94 GHz (about 3 mm wavelength) built by Rutherford Appleton Laboratory, UK, was tested at Sheepdrove Organic Farm, Lambourn, Berkshire, UK (51.5° N, 1.5° W). The terrain is complex, but typical for this part of England: rolling chalk downland (130 m to 220 m above sea level) with the soil being a variable mixture of flints, chalk, and brown rendzinas. Earlier scintillometry studies have revealed that over non-flat terrain or for slanted paths the so-called effective height of a scintillometer is a function of atmospheric stability. We found that over flat terrain the effective height for the LAS and MWS are almost the same. However, over complex terrain such as Sheepdrove Farm, we found differences. The practical consequences of our findings are discussed.

Item Type: Publication - Conference Item (Paper)
Programmes: CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.1 Hydrological processes
UKCEH and CEH Sections/Science Areas: Harding (to July 2011)
Additional Keywords: scintillometry, scintillometer, effective height, sensible heat flux, complex terrain
NORA Subject Terms: Meteorology and Climatology
Atmospheric Sciences
Date made live: 08 Sep 2011 11:32 +0 (UTC)

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