The firn meltwater Retention Model Intercomparison Project (RetMIP): evaluation of nine firn models at four weather station sites on the Greenland ice sheet
The firn meltwater Retention Model Intercomparison Project (RetMIP): evaluation of nine firn models at four weather station sites on the Greenland ice sheet
复制标题
冰雪融水滞留模型比对项目（RetMIP）：对格陵兰冰盖四个气象站的九个冰雪模型进行评估
DOI：
10.5194/tc-2019-331
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
J. Box
中科院分区：
文献类型：
--
作者：
B. Vandecrux;R. Mottram;P. Langen;R. Fausto;Martin Olesen;C. M. Stevens;V. Verjans;A. Leeson;S. Ligtenberg;P. Kuipers Munneke;Sergey Marchenko;W. V. van Pelt;C. Meyer;S. Simonsen;A. Heilig;S. Samimi;H. Machguth;M. Macferrin;M. Niwano;O. Miller;Clifford I. Voss;J. Box
抽象的。常年积雪或积雪覆盖了格陵兰冰盖的80%
并有能力保留表面融水，影响冰盖
质量平衡和对海平面上升的贡献。多层积雪模型是
传统上用于模拟积雪过程和估计融水
潴留我们目前，相互比较和评估输出从九个积雪
四个地点的模型，代表了冰盖的干雪，渗透，
冰层和积雪含水层地区。模型受质量和能量的作用
来自自动气象站的通量并与积雪密度进行比较，
温度和融水渗透深度观测。模特们都同意
在干雪地区相对较好，而在其他地方，
入渗方案导致模拟积雪的显著差异
特色解释深层融水渗透的模型高估了渗透深度和渗透处的积雪温度，
冰板的网站，但准确地模拟补给的积雪含水层。模型
使用达西定律和桶方案与观测到的积雪相比，
温度和融水渗透深度在渗透网站，但
只有达西模型能准确地模拟积雪温度和渗流
在冰板现场尽管在某些地方表现良好，但
目前，单一模型完全可以模拟融水的渗透
网站.该模型在估计融水滞留和径流方面的扩展
随着融水输入的增加而增加。计算了最高径流量
在KAN_U站点，2012年，
模型（±2σ）为353±610 mm w.e.。（水当量），约为地表融水输入量的27± 48%。我们确定了潜在的原因，
模型扩散和与观测值的不匹配，并提供建议
用于未来的模型开发和积雪调查。
Abstract. Perennial snow, or firn, covers 80 % of the Greenland ice sheet
and has the capacity to retain surface meltwater, influencing the ice sheet
mass balance and contribution to sea-level rise. Multilayer firn models are
traditionally used to simulate firn processes and estimate meltwater
retention. We present, intercompare and evaluate outputs from nine firn
models at four sites that represent the ice sheet's dry snow, percolation,
ice slab and firn aquifer areas. The models are forced by mass and energy
fluxes derived from automatic weather stations and compared to firn density,
temperature and meltwater percolation depth observations. Models agree
relatively well at the dry-snow site while elsewhere their meltwater
infiltration schemes lead to marked differences in simulated firn
characteristics. Models accounting for deep meltwater percolation overestimate percolation depth and firn temperature at the percolation and
ice slab sites but accurately simulate recharge of the firn aquifer. Models
using Darcy's law and bucket schemes compare favorably to observed firn
temperature and meltwater percolation depth at the percolation site, but
only the Darcy models accurately simulate firn temperature and percolation
at the ice slab site. Despite good performance at certain locations, no
single model currently simulates meltwater infiltration adequately at all
sites. The model spread in estimated meltwater retention and runoff
increases with increasing meltwater input. The highest runoff was calculated
at the KAN_U site in 2012, when average total runoff across
models (±2σ) was 353±610 mm w.e. (water equivalent), about 27±48 % of the surface meltwater input. We identify potential causes for the
model spread and the mismatch with observations and provide recommendations
for future model development and firn investigation.
影响因子：
64.8
作者：
MacFerrin, M.;Machguth, H.;Abdalati, W.
通讯作者：
Abdalati, W.
影响因子：
5.2
作者：
Heilig, Achim;Eisen, Olaf;Fettweis, Xavier
通讯作者：
Fettweis, Xavier
西格陵兰低积累区地表-大气能量交换和再冻结能力的变化
DOI：
10.5194/tc-9-2163-2015
发表时间：
2015
期刊：
The Cryosphere
影响因子：
--
作者：
Charalampidis C
通讯作者：
Charalampidis C