气候变化领域集成服务门户(CCPortal): The Improvement of Turbulent Heat Flux Parameterization for Use in the Tropical Regions Using Low Wind Speed Excess Resistance Parameter

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DOI	10.1029/2018MS001466
	The Improvement of Turbulent Heat Flux Parameterization for Use in the Tropical Regions Using Low Wind Speed Excess Resistance Parameter
	Akinnubi R.T.; Adeniyi M.O.
发表日期	2019
ISSN	19422466
起始页码	3636
结束页码	3649
卷号	11 期号:11
英文摘要	Reliable simulation of turbulent heat fluxes needed for modeling land-atmosphere interactions remains a challenge over the humid tropical region. This may be connected with the inadequate parameterization of the roughness lengths for momentum (z0m) and heat (z0h) transfer usually expressed in terms of excess resistance factor (κB−1). This paper assesses the performance of existing κB−1 schemes developed for high wind speed conditions over the humid tropical region. Thereafter, a more appropriate κB−1 suitable for low wind speed condition is developed for use in the aerodynamic resistance parameterization. Based on observed surface heat fluxes and profile measurements of wind speed and temperature from Nigeria Micrometeorological Experimental site, new κB−1 parameterization was derived through the application of the Monin-Obukhov similarity theory and Brutsaert theoretical model for heat transfer. The derived (Formula presented.), where Re* is the Reynolds number. Turbulent flux parameterization with this new formula provides better estimates of heat fluxes with reference to results from existing κB−1 schemes. The R2 increased by about 85%, while mean bias error and root-mean-square error in the parameterized QH based on the derived κB−1 reduced by about 63% and 66.7%, respectively. Similarly, the R2 increased by about 38%, while mean bias error and root-mean-square error in the parameterized QE based on the derived κB−1 reduced by about 47.8% and 52.6%, respectively. The derived κB−1 gave better estimates of QH than QE during the daytime. The derived κB−1 scheme corrects a well-documented, large overestimation of turbulent heat fluxes, and it is therefore recommended for use in regions where low wind speed is prevalent. ©2019. The Authors.
英文关键词	excess resistance factor; tropics; turbulent heat fluxes
语种	英语
scopus关键词	Errors; Heat resistance; Heat transfer; Mean square error; Parameter estimation; Parameterization; Reynolds number; Speed; Tropical engineering; Tropics; Wind; Aerodynamic resistance; Land atmosphere interaction; Low wind speed condition; Monin-Obukhov similarity theory; Resistance factors; Resistance parameters; Root mean square errors; Turbulent heat fluxes; Heat flux; aerodynamics; land-atmosphere interaction; latent heat flux; parameterization; performance assessment; Reynolds number; roughness; tropical region; wind velocity; Nigeria
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156833
作者单位	Department of Physics, Adeyemi College of Education, Ondo, Nigeria; Department of Physics, University of Ibadan, Ibadan, Nigeria
推荐引用方式 GB/T 7714	Akinnubi R.T.,Adeniyi M.O.. The Improvement of Turbulent Heat Flux Parameterization for Use in the Tropical Regions Using Low Wind Speed Excess Resistance Parameter[J],2019,11(11).
APA	Akinnubi R.T.,&Adeniyi M.O..(2019).The Improvement of Turbulent Heat Flux Parameterization for Use in the Tropical Regions Using Low Wind Speed Excess Resistance Parameter.Journal of Advances in Modeling Earth Systems,11(11).
MLA	Akinnubi R.T.,et al."The Improvement of Turbulent Heat Flux Parameterization for Use in the Tropical Regions Using Low Wind Speed Excess Resistance Parameter".Journal of Advances in Modeling Earth Systems 11.11(2019).