Fluxes of sensible heat and momentum in the surface layer estimated from the profile measurements of wind and temperature at a tropical station
Main Article Content
Abstract
In this study the surface layer fluxes for both the sensible heat and momentum have been estimated at a tropical location; Osu, Nigeria (7º26' N, 4º35' E), using profile measurements of mean wind and temperature realized within the pre-monsoon season (January - March). Due to the weak surface winds that commonly exist in the area (for the study period, U was 1.24 m.s-1) and strong insolation, the daytime SL was frequently found to be within the free convection regime. Typically in the daytime, the sensible heat flux H~200 W.m-2 and the friction velocity u* ~ 0.2 m.s-1. At nighttimes, the ground-based temperature inversion was very pronounced (>0.33ºC.m-1) and it is such that the intensity of the turbulence in the nocturnal SL was weaker, shallower, sporadic and unsustained (H~ -5.0 W.m-2; * < 0.2 m.s-1). The frequency distribution of these derived fluxes (and the mean variables) for the observation period is also discussed.
Downloads
Download data is not yet available.
Article Details
Once an article is accepted for publication, the author(s) agree that, from that date on, the owner of the copyright of their work(s) is Atmósfera.
Reproduction of the published articles (or sections thereof) for non-commercial purposes is permitted, as long as the source is provided and acknowledged.
Authors are free to upload their published manuscripts at any non-commercial open access repository.