Regional turbulent statistics over contrasting natural surfaces |
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| Authors: | T J Lyons Li Fuqin J M Hacker Wan-Li Cheng Huang Xinmei |
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| Institution: | (1) Environmental Science, Murdoch University, Murdoch, Australia, AU;(2) Climate Analysis Section, Bureau of Meteorology, Melbourne, Australia, AU;(3) Airborne Research Australia, Flinders University of South Australia, Adelaide, Australia, AU;(4) Department of Environmental Science, Tunghai University, Taiwan, TW |
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| Abstract: | Summary
Regional turbulent fluxes of momentum, sensible and latent heat collected over both agricultural and native vegetation in
the south west of Australia are presented. Analysis of the energy spectrum illustrates that the most energetic eddies are
between scales of 20 metres to 5 kilometres and highlights the spatial distance required to obtain representative regional
fluxes. For the sensible heat flux, this distance is a function of measurement height whereas the latent flux is also influenced
by surface variability. Statistics of these fluxes highlight that for the unstable surface layer, despite marked differences
in the underlying vegetation and the corresponding sources of heat and moisture, heat is transported more efficiently than
water vapour from the ground surface.
Received October 9, 2000/Revised April 23, 2001 |
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