Impact of updated radiative transfer scheme in snow and ice in RACMO2.3p3 on the surface mass and energy budget of the Greenland ice sheet
Impact of updated radiative transfer scheme in snow and ice in RACMO2.3p3 on the surface mass and energy budget of the Greenland ice sheet
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RACMO2.3p3 中更新的冰雪辐射传输方案对格陵兰冰盖表面质量和能量预算的影响
DOI：
10.5194/tc-15-1823-2021
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
M. R. van den Broeke
中科院分区：
文献类型：
--
作者：
Christiaan T. van Dalum;W. J. van de Berg;M. R. van den Broeke
抽象的。区域气候模型中通常没有明确地模拟雪和冰中的辐射传输。在这项研究中，我们评估了一种新的冰川辐射传输方案，并评估了最新版本的区域气候模型 RACMO2（版本 2.3p3）中格陵兰冰盖的表面质量和能量收支。我们还评估了建模的（次）表面温度和熔化，因为辐射穿透现在可以实现内部加热。将结果与之前的模型版本进行比较，并根据 K 样线和 PROMICE 项目的桩测量和自动气象站数据进行评估。此外，还比较了 K 样带、萨米特和格陵兰岛东南部的地下雪温剖面。表面质量平衡与观测结果非常吻合，平均偏差为 - 31 mm w.e。 yr -1 ( - 2.67 %)，并且仅相对于之前的 RACMO2 版本在冰缘和渗滤区附近发生了很大变化。另一方面，由于反照率表示、地下能量吸收和融水渗透的变化，融化和再冻结在各个区域发生了更大的变化。与观测结果一致，内部加热导致夏季雪温升高，并引入浅层地下融化。因此，这项研究表明了冰雪辐射传输对格陵兰冰盖区域气候模型的影响和必要性。
Abstract. Radiative transfer in snow and ice is often not modeled explicitly in regional climate models. In this study, we evaluate a new englacial radiative transfer scheme and assess the surface mass and energy budget for the Greenland ice sheet in the latest version of the regional climate model RACMO2, version 2.3p3. We also evaluate the modeled (sub)surface temperature and melt, as radiation penetration now enables internal heating. The results are compared to the previous model version and are evaluated against stake measurements and automatic weather station data of the K-transect and PROMICE projects. In addition, subsurface snow temperature profiles are compared at the K-transect, Summit, and southeast Greenland. The surface mass balance is in good agreement with observations, with a mean bias of − 31 mm w.e. yr −1 ( − 2.67 %), and only changes considerably with respect to the previous RACMO2 version around the ice margins and near the percolation zone. Melt and refreezing, on the other hand, are changed more substantially in various regions due to the changed albedo representation, subsurface energy absorption, and meltwater percolation. Internal heating leads to higher snow temperatures in summer, in agreement with observations, and introduces a shallow layer of subsurface melt. Hence, this study shows the consequences and necessity of radiative transfer in snow and ice for regional climate modeling of the Greenland ice sheet.
格陵兰岛极端温度事件的观测和 MAR 区域气候模型
DOI：
10.5194/tc-12-1091-2018
发表时间：
2018
期刊：
The Cryosphere
影响因子：
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作者：
Leeson A
通讯作者：
Leeson A
影响因子：
4.9
作者：
C. He;Y. Takano;K. Liou;P. Yang;Qinbin Li;Fei Chen
通讯作者：
C. He;Y. Takano;K. Liou;P. Yang;Qinbin Li;Fei Chen
前所未有的大气条件（1948
DOI：
10.5194/tc-14-1209-2020
发表时间：
2020
期刊：
The Cryosphere
影响因子：
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作者：
Tedesco, Marco;Fettweis, Xavier
通讯作者：
Fettweis, Xavier