气候变化领域集成服务门户(CCPortal): A Non-Gradient Model of Turbulent Gas Fluxes Over Land Surfaces

CCPortal

DOI	10.1029/2021JD034605
	A Non-Gradient Model of Turbulent Gas Fluxes Over Land Surfaces
	Tang Y.; Shahnaz S.; Wang J.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:14
英文摘要	A non-gradient model is formulated for estimating gas fluxes using single-level time-series data of near-surface gas concentration over land surfaces. When the vertical turbulent transport process in the atmospheric surface layer is described by a one-dimensional diffusion equation, a gas flux is expressed as a weighted integral of the time-history of single-level gas concentration. The eddy-diffusivity may be parameterized as a function of sensible heat flux based on the Monin-Obukhov similarity theory without explicit dependence on wind speed and surface roughness. Sensible heat flux may be estimated from net radiation and surface temperature using the maximum entropy production model. Case studies at six sites with diverse vegetation covers, geographic and climatic conditions at sub-daily and seasonal scales demonstrate the model's capability of simulating water vapor and CO2 fluxes using fewer inputs than other models. The proposed method provides an alternative modeling tool for the study of water and carbon cycles over vegetated land surfaces. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	non-gradient model; single-level gas concentration; Surface gas fluxes
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237128
作者单位	School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Department of Civil and Construction Engineering, Kennesaw State University, Marietta, GA, United States
推荐引用方式 GB/T 7714	Tang Y.,Shahnaz S.,Wang J.. A Non-Gradient Model of Turbulent Gas Fluxes Over Land Surfaces[J],2021,126(14).
APA	Tang Y.,Shahnaz S.,&Wang J..(2021).A Non-Gradient Model of Turbulent Gas Fluxes Over Land Surfaces.Journal of Geophysical Research: Atmospheres,126(14).
MLA	Tang Y.,et al."A Non-Gradient Model of Turbulent Gas Fluxes Over Land Surfaces".Journal of Geophysical Research: Atmospheres 126.14(2021).