DOI: 10.1002/2017MS000988
Scopus记录号: 2-s2.0-85034075596
论文题名: Improving the Representation of Polar Snow and Firn in the Community Earth System Model
作者: van Kampenhout L ; , Lenaerts J ; T ; M ; , Lipscomb W ; H ; , Sacks W ; J ; , Lawrence D ; M ; , Slater A ; G ; , van den Broeke M ; R
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 7 起始页码: 2583
结束页码: 2600
语种: 英语
英文关键词: Compaction
; Glaciers
; Ice
; Sea level
; Snowfall measurement
; Solvents
; Community land models
; Earth system model
; Firn
; Ice sheet
; Near-surface density
; Overburden pressures
; Polar snow
; Skin temperatures
; Snow
; compaction
; density
; firn
; ice sheet
; land surface
; mass balance
; melting
; metamorphism
; overburden
; parameterization
; polar front
; seasonality
; snowmelt
; snowpack
英文摘要: In Earth system models, terrestrial snow is usually modeled by the land surface component. In most cases, these snow models have been developed with an emphasis on seasonal snow. Questions about future sea level rise, however, prompt the need for a realistic representation of perennial snow, as snow processes play a key role in the mass balance of glaciers and ice sheets. Here we enhance realism of modeled polar snow in the Community Land Model (CLM), the land component of the Community Earth System Model (CESM), by implementing (1) new parametrizations for fresh snow density, destructive metamorphism, and compaction by overburden pressure, (2) by allowing for deeper snow packs, and (3) by introducing drifting snow compaction, with a focus on the ice sheet interior. Comparison with Greenlandic and Antarctic snow density observations show that the new physics improve model skill in predicting firn and near-surface density in the absence of melt. Moreover, compensating biases are removed and spurious subsurface melt rates at ice sheets are eliminated. The deeper snow pack enhances refreezing and allows for deeper percolation, raising ice temperatures up to 15°C above the skin temperature. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75711
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands; Group T-3, Los Alamos National Laboratory, Los Alamos, NM, United States; National Center for Atmospheric Research, Boulder, CO, United States; National Snow and Ice Data Center, Boulder, CO, United States
Recommended Citation:
van Kampenhout L,, Lenaerts J,T,et al. Improving the Representation of Polar Snow and Firn in the Community Earth System Model[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(7)