An analysis of MONTBLEX data on heat and momentum flux at Jodhpur

Rao, KG and Narasimha, R and Prabhu, A (1996) An analysis of MONTBLEX data on heat and momentum flux at Jodhpur. In: Journal of Earth System Science, 105 (3). pp. 309-323.

PDF An_Analysis.pdf - Published Version Restricted to Registered users only Download (63kB) | Request a copy

Abstract

Parameterization of sensible heat and momentum fluxes as inferred from an analysis of tower observations archived during MONTBLEX-90 at Jodhpur is proposed, both in terms of standard exchange coefficients C-H and C-D respectively and also according to free convection scaling. Both coefficients increase rapidly at low winds (the latter more strongly) and with increasing instability. All the sensible heat flux data at Jodhpur (wind speed at 10m <(U)over bar (10)>, < 8ms(-1)) also obey free convection scaling, with the flux proportional to the '4/3' power of an appropriate temperature difference such as that between 1 and 30 m. Furthermore, for <(U)over bar (10)> < 4 ms(-1) the momentum flux displays a linear dependence on wind speed.

Item Type:	Journal Article
Publication:	Journal of Earth System Science
Publisher:	Indian Academy Sciences
Additional Information:	Copyright of this article belongs to Indian Academy Sciences.
Keywords:	Sensible heat flux;momentum flux;free convection;exchange coefficient of heat;drag coefficient.
Department/Centre:	Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	26 Feb 2009 06:46
Last Modified:	19 Sep 2010 05:27
URI:	http://eprints.iisc.ac.in/id/eprint/19231

Actions (login required)

View Item