Article Type:
Research Article

A Simple Method to Determine Obukhov Lengths for Suburban Areas

C. S. B. Grimmond Climate and Meteorology Program, Geography Department, Indiana University, Bloomington, Indiana

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H. A. Cleugh School of Earth Sciences, Macquarie University, North Ryde, New South Wales, Australia

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Print Publication:
01 Mar 1994
DOI:
https://doi.org/10.1175/1520-0450(1994)033<0435:ASMTDO>2.0.CO;2
Page(s):
435–440
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Abstract

A simple scheme is presented to calculate Obukhov stability lengths L for suburban areas when measurements of sensible heat flux Qh or temperature gradients are not available. The scheme replaces Qv with χQ*, where Q* is net all-wave radiation, and χ = QH/Q*, which is based on data collected in North American cities. The results suggest that the simple two-part model with either a variable or fixed value of χ for daytime works satisfactorily.

Abstract

A simple scheme is presented to calculate Obukhov stability lengths L for suburban areas when measurements of sensible heat flux Qh or temperature gradients are not available. The scheme replaces Qv with χQ*, where Q* is net all-wave radiation, and χ = QH/Q*, which is based on data collected in North American cities. The results suggest that the simple two-part model with either a variable or fixed value of χ for daytime works satisfactorily.

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Cover Journal of Applied Meteorology and Climatology
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