Following moist intrusions into the Arctic using SHEBA observations in a Lagrangian perspective
Following moist intrusions into the Arctic using SHEBA observations in a Lagrangian perspective
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使用拉格朗日视角下的 SHEBA 观测追踪湿气侵入北极
DOI：
10.1002/qj.3859
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发表时间：
2020
影响因子：
8.9
通讯作者：
F. Pithan
中科院分区：
文献类型：
--
作者：
S. M. Ali;F. Pithan
一年四季，温暖潮湿的气团从低纬度输送到北极。尤其是在冬季，这种潮湿的入侵(Mis)会引发云的形成和地表变暖。虽然北极冬季边界层的典型多云状态与潮湿气团的平流有关，但缺乏对潮湿的中纬度空气向干燥的北极空气转化的直接观测。在这里，我们使用了北冰洋地表热量平衡(SHEBA)项目的观测数据，汇编了拉格朗日意义下沿冷暖气团轨迹的欧拉观测，显示了海冰上气团的冷却和干燥以及开阔海洋上的增湿。主要来自开阔水域的气团在观测点上空产生多云条件，而来自大陆或海冰的气团产生辐射晴朗的条件。我们建议使用我们的案例研究和通过反向轨迹将探险与站点探测联系起来的方法，以便在未来的战役中模拟工作。
Warm and moist air masses are transported into the Arctic from lower latitudes throughout the year. Especially in winter, such moist intrusions (MIs) can trigger cloud formation and surface warming. While a typical cloudy state of the Arctic winter boundary layer has been linked to the advection of moist air masses, direct observations of the transformation from moist midlatitude to dry Arctic air are lacking. Here, we have used observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) project to compile Eulerian observations along the trajectories of warm and cold air masses in a Lagrangian sense, showing the cooling and drying of air masses over sea ice and moistening over the open ocean. Air masses originating mostly over open water generate cloudy conditions over the observation site, whereas air masses originating over continents or sea ice generate radiatively clear conditions. We recommend using our case‐studies and the method of linking expeditions to station soundings via back‐trajectories for modelling work in future campaigns.
影响因子：
6.3
作者：
Shupe, M. D.;Persson, P. O. G.;Leck, C.
通讯作者：
Leck, C.