DOI: 10.5194/hess-23-1-2019
论文题名: A simple model for local-scale sensible and latent heat advection contributions to snowmelt
作者: Harder P. ; Pomeroy J.W. ; Helgason W.D.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2019
卷: 23, 期: 1 起始页码: 1
结束页码: 17
语种: 英语
Scopus关键词: Antennas
; Crystallography
; Energy balance
; Frozen soils
; Latent heat
; Snow
; Snow melting systems
; Surface waters
; Advection fluxes
; Land surface scheme
; Scaling properties
; Simple modeling
; Snow covered area
; Snowmelt hydrology
; Soil infiltration
; Water retention
; Advection
; advection
; energy balance
; frozen ground
; infiltration
; latent heat flux
; numerical model
; one-dimensional modeling
; parameterization
; prediction
; sensible heat flux
; snow cover
; snowmelt
; unmanned vehicle
; water retention
英文摘要: Local-scale advection of energy from warm snow-free surfaces to cold snow-covered surfaces is an important component of the energy balance during snow-cover depletion. Unfortunately, this process is difficult to quantify in one-dimensional snowmelt models. This paper proposes a simple sensible and latent heat advection model for snowmelt situations that can be readily coupled to one-dimensional energy balance snowmelt models. An existing advection parameterization was coupled to a conceptual frozen soil infiltration surface water retention model to estimate the areal average sensible and latent heat advection contributions to snowmelt. The proposed model compared well with observations of latent and sensible heat advection, providing confidence in the process parameterizations and the assumptions applied. Snow-covered area observations from unmanned aerial vehicle imagery were used to update and evaluate the scaling properties of snow patch area distribution and lengths. Model dynamics and snowmelt implications were explored within an idealized modelling experiment, by coupling to a one-dimensional energy balance snowmelt model. Dry, snow-free surfaces were associated with advection of dry air that compensated for positive sensible heat advection fluxes and so limited the net influence of advection on snowmelt. Latent and sensible heat advection fluxes both contributed positive fluxes to snow when snow-free surfaces were wet and enhanced net advection contributions to snowmelt. The increased net advection fluxes from wet surfaces typically develop towards the end of snowmelt and offset decreases in the one-dimensional areal average melt energy that declines with snow-covered area. The new model can be readily incorporated into existing one-dimensional snowmelt hydrology and land surface scheme models and will foster improvements in snowmelt understanding and predictions. © 2019 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163088
Appears in Collections: 气候变化与战略
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作者单位: Harder, P., Centre for Hydrology, University of Saskatchewan, Saskatoon, SK, Canada; Pomeroy, J.W., Centre for Hydrology, University of Saskatchewan, Saskatoon, SK, Canada; Helgason, W.D., Centre for Hydrology, University of Saskatchewan, Saskatoon, SK, Canada, Department of Civil Geological, and Environmental Engineering, University of Saskatchewan, Saskatoon, SK, Canada
Recommended Citation:
Harder P.,Pomeroy J.W.,Helgason W.D.. A simple model for local-scale sensible and latent heat advection contributions to snowmelt[J]. Hydrology and Earth System Sciences,2019-01-01,23(1)