气候变化领域集成服务门户(CCPortal): Analysis of Water Vapor Fluxes Over a Seasonal Snowpack Using the Maximum Entropy Production Model

CCPortal

DOI	10.1029/2020JD033049
	Analysis of Water Vapor Fluxes Over a Seasonal Snowpack Using the Maximum Entropy Production Model
	Hajji I.; Nadeau D.F.; Music B.; Anctil F.; Wang J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:1
英文摘要	Snow cover plays a key role in the water and energy budgets over cold regions. Understanding and parameterizing water and heat exchange over snow surfaces in hydrologic models remains a major challenge. An innovative approach based on the theory of maximum entropy production (MEP) was developed for modeling energy budgets for snow-covered surfaces. This study generalizes the MEP model to simulate surface water vapor (latent heat) fluxes over an entire snowpack lifecycle, including snow accumulation and melting during the early growing season. The expanded MEP model combines soil evaporation, canopy transpiration, and snow sublimation to evaluate snow water loss during the lifecycle of the snowpack. Two hypotheses are tested: (1) sublimation becomes negligible during snowmelt when snowpack is isothermal (0°C) and (2) transpiration is progressively activated as a function of the air temperature during vegetation awakening. The proposed approach is shown to be effective for modeling the total surface water vapor fluxes over the snowpack's lifecycle. Both the hypotheses are supported by field observations. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	early growing season; maximum entropy production model; melting season; snowpack lifecycle; water vapor flux
语种	英语
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/185561
作者单位	Department of Civil and Water Engineering, Université Laval, Québec, QC, Canada; Ouranos - Consortium on Regional Climatology and Adaptation to Climate Change, Montréal, QC, Canada; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, United States
推荐引用方式 GB/T 7714	Hajji I.,Nadeau D.F.,Music B.,et al. Analysis of Water Vapor Fluxes Over a Seasonal Snowpack Using the Maximum Entropy Production Model[J],2021,126(1).
APA	Hajji I.,Nadeau D.F.,Music B.,Anctil F.,&Wang J..(2021).Analysis of Water Vapor Fluxes Over a Seasonal Snowpack Using the Maximum Entropy Production Model.Journal of Geophysical Research: Atmospheres,126(1).
MLA	Hajji I.,et al."Analysis of Water Vapor Fluxes Over a Seasonal Snowpack Using the Maximum Entropy Production Model".Journal of Geophysical Research: Atmospheres 126.1(2021).