Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System

O.K. Hartogensis, J.G. Evans, A.J.H. van Kesteren, F. Beyrich

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

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.
Original languageEnglish
Title of host publication30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences
Place of PublicationBoston
PublisherAmerican Meteorological Society
Pages8.5
Publication statusPublished - 2012
Event30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences -
Duration: 28 May 20121 Jun 2012

Conference

Conference30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences
Period28/05/121/06/12

Fingerprint

evapotranspiration
vibration
sensible heat flux
water vapor
observatory
air temperature
saturation
sensor
summer

Cite this

Hartogensis, O. K., Evans, J. G., van Kesteren, A. J. H., & Beyrich, F. (2012). Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System. In 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences (pp. 8.5). Boston: American Meteorological Society.
Hartogensis, O.K. ; Evans, J.G. ; van Kesteren, A.J.H. ; Beyrich, F. / Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System. 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences. Boston : American Meteorological Society, 2012. pp. 8.5
@inproceedings{27c53180d30041ddaac3ae2a69a1fdbb,
title = "Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System",
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.",
author = "O.K. Hartogensis and J.G. Evans and {van Kesteren}, A.J.H. and F. Beyrich",
year = "2012",
language = "English",
pages = "8.5",
booktitle = "30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences",
publisher = "American Meteorological Society",
address = "United States",

}

Hartogensis, OK, Evans, JG, van Kesteren, AJH & Beyrich, F 2012, Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System. in 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences. American Meteorological Society, Boston, pp. 8.5, 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences, 28/05/12.

Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System. / Hartogensis, O.K.; Evans, J.G.; van Kesteren, A.J.H.; Beyrich, F.

30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences. Boston : American Meteorological Society, 2012. p. 8.5.

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

TY - GEN

T1 - Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System

AU - Hartogensis, O.K.

AU - Evans, J.G.

AU - van Kesteren, A.J.H.

AU - Beyrich, F.

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

M3 - Conference paper

SP - 8.5

BT - 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences

PB - American Meteorological Society

CY - Boston

ER -

Hartogensis OK, Evans JG, van Kesteren AJH, Beyrich F. Evapotranspiration at Kilometre Scale using a Bi-Chromatic Scintillometer System. In 30th AMS Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Biogeosciences. Boston: American Meteorological Society. 2012. p. 8.5