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Infrared and Millimetre-wave Scintillometry in the Suburban Environment – Part 1: Structure Parameters : Volume 7, Issue 11 (17/11/2014)

By Ward, H. C.

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Book Id: WPLBN0004000057
Format Type: PDF Article :
File Size: Pages 52
Reproduction Date: 2015

Title: Infrared and Millimetre-wave Scintillometry in the Suburban Environment – Part 1: Structure Parameters : Volume 7, Issue 11 (17/11/2014)  
Author: Ward, H. C.
Volume: Vol. 7, Issue 11
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Evans, J. G., B. Grimmon, C. S., Bradford, J., & Ward, H. C. (2014). Infrared and Millimetre-wave Scintillometry in the Suburban Environment – Part 1: Structure Parameters : Volume 7, Issue 11 (17/11/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Centre for Ecology and Hydrology, Wallingford, Oxfordshire, OX10 8BB, UK. Scintillometry, a form of ground-based remote sensing, provides the capability to estimate surface heat fluxes over scales of a few hundred metres to kilometres. Measurements are spatial averages, making this technique particularly valuable over areas with moderate heterogeneity such as mixed agricultural or urban environments. In this study, we present the structure parameters of temperature and humidity, which can be related to the sensible and latent heat fluxes through similarity theory, for a suburban area in the UK. The fluxes are provided in the second paper of this two-part series. A unique millimetre-wave scintillometer was combined with an infrared scintillometer along a 5.5 km path over northern Swindon. The pairing of these two wavelengths offers sensitivity to both temperature and humidity fluctuations and the so-called bichromatic-correlation method is also used to retrieve the path-averaged temperature-humidity correlation. Comparison is made with structure parameters calculated from an eddy covariance station located close to the centre of the scintillometer path. The performance of the techniques under different conditions is discussed. Similar behaviour is seen between the two datasets at sub-daily timescales. For the two summer-to-winter periods presented here, similar evolution is displayed across the seasons. A higher vegetation fraction within the scintillometer source area is consistent with the lower Bowen ratio observed (midday Bowen ratio < 1) compared with more built-up areas around the eddy covariance station. The energy partitioning is further explored in the copanion paper.

Summary
Infrared and millimetre-wave scintillometry in the suburban environment – Part 1: Structure parameters

Excerpt
Allen, L., Lindberg, F., and Grimmond, C. S. B.: Global to city scale urban anthropogenic heat flux: model and variability, Int. J. Climatol., 31, 1990–2005, doi:10.1002/joc.2210, 2011.; Andreas, E. L.: Estimating Cn2 over snow and sea ice from meteorological data, J. Opt. Soc. Am., 5, 481–495, 1988.; Andreas, E. L.: Two-wavelength method of measuring path-averaged turbulent surface heat fluxes, J. Atmos. Ocean. Tech., 6, 280–292, 1989.; Andreas, E. L.: Three-wavelength method of measuring path-averaged turbulent heat fluxes, J. Atmos. Ocean. Tech., 7, 801–814, 1990.; Andreas, E. L., Hill, R. J., Gosz, J. R., Moore, D. I., Otto, W. D., and Sarma, A. D.: Statistics of surface-layer turbulence over terrain with metre-scale heterogeneity, Bound.-Lay. Meteorol., 86, 379–408, 1998.; Beyrich, F., De Bruin, H. A. R., Meijninger, W. M. L., Schipper, J. W., and Lohse, H.: Results from one-year continuous operation of a large aperture scintillometer over a heterogeneous land surface, Bound.-Lay. Meteorol., 105, 85–97, 2002.; Beyrich, F., Kouznetsov, R. D., Leps, J. P., Lüdi, A., Meijninger, W. M. L., and Weisensee, U.: Structure parameters for temperature and humidity from simultaneous eddy-covariance and scintillometer measurements, Meteorol. Z., 14, 641–649, doi:10.1127/0941-2948/2005/0064, 2005.; Beyrich, F., Bange, J., Hartogensis, O., Raasch, S., Braam, M., van Dinther, D., Gräf, D., van Kesteren, B., van den Kroonenberg, A., Maronga, B., Martin, S., and Moene, A.: Towards a validation of scintillometer measurements: the LITFASS-2009 Experiment, Bound.-Lay. Meteorol., 144, 83–112, doi:10.1007/s10546-012-9715-8, 2012.; Bosveld, F. C.: The KNMI Garderen Experiment: Micro-Meteorological Observations 1988–1989, Scientific Report WR 99-03, KNMI, the Netherlands, 57 pp., 1999.; Braam, M.: Determination of the Surface Sensible Heat Flux from the Structure Parameter of Temperature at 60 m Height During Day-Time, Technical Report TR-303, KNMI, the Netherlands, 42 pp., 2008; Braam, M., Bosveld, F., and Moene, A.: On Monin–Obukhov scaling in and above the atmospheric surface layer: the complexities of elevated scintillometer measurements, Bound.-Lay. Meteorol., 144, 157–177, doi:10.1007/s10546-012-9716-7, 2012.; Christen, A. and Vogt, R.: Energy and radiation balance of a central European city, Int. J. Climatol., 24, 1395–1421, doi:10.1002/joc.1074, 2004.; Clifford, S. F.: Temporal-frequency spectra for a spherical wave propagating through atmospheric turbulence, J. Opt. Soc. Am., 61, 1285–1292, 1971.; Clifford, S. F., Ochs, G. R., and Lawrence, R. S.: Saturation of optical scintillation by strong turbulence, J. Opt. Soc. Am., 64, 148–154, 1974.; De Bruin, H. A. R., Kohsiek, W., and Van den Hurk, B. J. J. M.: A verification of some methods to determine the fluxes of momentum, sensible heat, and water-vapour using standard-deviation and structure parameter of scalar meteorological quantities, Bound.-Lay. Meteorol., 63, 231–257, 1993.; Evans, J. G.: Long-Path Scintillometry over Complex Terrain to Determine Areal-Averaged Sensible and Latent Heat Fluxes, Ph.D. thesis, Soil Science Department, The University of Reading, Reading, UK, 181 pp., 2009; Evans, J. G. and De Bruin, H. A. R.: The effective height of a two-wavelength scintillometer system, Bound.-Lay. Meteorol., 141, 165–177, doi:10.1007/s10546-011-9634-0, 2011.; Evans, J. G., McNeil, D. D., Finch, J. F., Murray, T., Harding, R. J., and Verhoef, A.: Evaporation measurements at kilometre scales determined using two-wavelength scintillometry, BHS Third Interna

 

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