Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 431515
Title Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System
Author(s) Hartogensis, O.K.; Evans, J.G.; Kesteren, A.J.H. van; Beyrich, F.
Source In: 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences. - Boston : American Meteorological Society - p. 8.5 - 8.5.
Event Boston : American Meteorological Society 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences, 2012-05-28/2012-06-01
Department(s) Meteorology and Air Quality
Publication type Contribution in proceedings
Publication year 2012
Abstract Scintillometry has become a generally accepted technique to obtain area-averaged turbulent fluxes at the 0.1 – 10 km scale. Optical large aperture scintillometers (LAS) that yield the sensible heat flux (H) have been tested under a wide range of circumstances (De Bruin, 2002) and are commercially available. With a LAS in combination with a millimeter-wave scintillometer (MWS) the evapotranspiration (LvE) can be determined. Our aim is to develop such a combined Optical Millimeter Wave Scintillometer (OMS) system for operational use. In this study we will present results of the two OMS systems that were operated in the summer of 2009 as part of the LITFASS2009 campaign at the Meteorological Observatory Lindenberg, Germany. Although the final goal of the OMS system is to obtain LvE, first a number of instrumental issues have to be dealt with, such as scintillations caused by water vapor absorption, direct observation of the correlation between atmospheric temperature and humidity fluctuations, saturation of the LAS signal for long paths and the sensitivity of the OMS to mast vibrations. To this end all raw signals of the scintillometers were measured and stored at 500Hz, providing maximum freedom in the data processing, e.g. allowing spectral filtering. In addition, 2D-acceloremeter measurements were taken on the sensors to evaluate the impact of mast-vibration.
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