Idealized dry quasi 2‐D mesoscale simulations of cold‐air outbreaks over the marginal sea ice zone with fine and coarse resolution
Idealized dry quasi 2‐D mesoscale simulations of cold‐air outbreaks over the marginal sea ice zone with fine and coarse resolution
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边缘海冰区冷空气爆发的理想化干准二维中尺度模拟，具有精细和粗略分辨率
DOI：
10.1002/jgrd.50679
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Gryanik V.M.
中科院分区：
文献类型：
--
作者：
Chechin;Lüpkes;Repina;Gryanik V.M.
非静水力模型 (NH3D) 用于使用 1.25 至 60 km 之间的水平网格间距对北极冷空气爆发进行理想化干准二维模拟。尽管是理想化的设置，模型结果与弗拉姆海峡的观测结果非常吻合。结果表明，冷空气爆发期间流态的一个重要特征是冰风急流（IBJ），其最大风速通常超过大范围地转风速。根据目前的模拟，这与另一个非静水静中尺度模型（METRAS）的模拟非常吻合，该射流的出现、强度和水平范围L很大程度上取决于外强迫，尤其是大尺度地转风相对于冰缘方向的方向。后一种依赖性可以通过开放水域上热诱发的地转风和科里奥利力的影响来解释。研究发现，粗分辨率运行低估了射流的强度。这种低估对地表热量和动量通量产生了重要影响，冰缘和下游 120-180 公里之间的区域平均也被低估了约 10-15%。我们的结果表明，需要大约L/7的网格间距（大约10-30km）来模拟IBJ强度，精度至少为10%。因此，大规模模型的结果也可能包含模拟 IBJ 强度的不确定性，这将影响边缘海冰区大范围的能量预算。
A nonhydrostatic model (NH3D) is used for idealized dry quasi 2‐D simulations of Arctic cold‐air outbreaks using horizontal grid spacings between 1.25 and 60 km. Despite the idealized setup, the model results agree well with observations over Fram Strait. It is shown that an important characteristic of the flow regime during cold‐air outbreaks is an ice‐breeze jet (IBJ) with a maximum wind speed exceeding often the large‐scale geostrophic wind speed. According to the present simulations, which agree very well with those of another nonhydrostatic mesoscale model (METRAS), the occurrence, strength, and horizontal extentLof this jet depend strongly on the external forcing and especially on the direction of the large‐scale geostrophic wind relative to the orientation of the ice edge. The latter dependency is explained by the effects of the thermally induced geostrophic wind over open water and Coriolis force. It is found that coarse‐resolution runs underestimate the strength of the jet. This underestimation has important consequences to the surface fluxes of heat and momentum, which are also underestimated by about 10–15% on average over the region between the ice edge and 120–180 km downstream. Our results suggest that a grid spacing of aboutL/7 is required (about 10–30 km) to simulate the IBJ strength with an accuracy of at least 10%. Thus, the results of large‐scale models as well might contain uncertainties with regard to the simulated IBJ strength which would influence the energy budget in a large region along the marginal sea ice zones.
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影响因子：
4.3
作者：
G. Müller;A. Chlond
通讯作者：
A. Chlond
未来气候变化：北极的建模和情景
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
V. Kattsov;E. Källén;H. Cattle;J. Christensen;H. Drange;I. Hanssen‐Bauer;T. Jóhannesen;I. Karol;J. Räisänen;G. Svensson;Stanislav Vavulin
通讯作者：
Stanislav Vavulin
“北极边界层建模：使用示巴项目数据对六个 Arcmip 区域规模模型进行评估”
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
M. Tjernström;M. Žagar;G. Svensson;J. Cassano;S. Pfeifer;A. Rinke;K. Wyser;K. Dethloff;Colin G. Jones;T. Semmler;M. Shaw
通讯作者：
M. Shaw
使用不同的湍流参数化对北极对流边界层进行建模
影响因子：
4.3
作者：
Christof L�pkes;K. Heinke Schl�nzen
通讯作者：
K. Heinke Schl�nzen
冷空气爆发时海冰不均匀性对滚流对流的影响
影响因子：
5.2
作者：
M. Gryschka;C. Drüe;D. Etling;S. Raasch
通讯作者：
S. Raasch