An analysis of MONTBLEX data on heat and momentum flux at Jodhpur |
| |
Authors: | Kusuma G Rao R Narasimha A Prabhu |
| |
Institution: | (1) Jawaharlal Nehru Centre for Advanced Scientific Research, 560 094 Bangalore, India;(2) Centre for Atmospheric Sciences, Indian Institute of Science, 560 012 Bangalore, India |
| |
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 coefficientsC
H
andC
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 10 m Ū10 < 8 ms−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 Ū10 < 4 ms−1 the momentum flux displays a linear dependence on wind speed. |
| |
Keywords: | Sensible heat flux momentum flux free convection exchange coefficient of heat drag coefficient |
本文献已被 SpringerLink 等数据库收录! |