Abstract. During the warm months of the year in Catalonia, the marine air overcomes the coastal mountain range and reaches the eastern Ebro sub-basin. This phenomenon is called marinada and has recently been thoroughly characterized for the first time by Jiménez et al. (2023), based on surface climatological data. However, the main physical mechanisms involved in its arrival and propagation remain to be discovered. This study aims to understand how the marinada is formed and how it interacts with the already developed atmospheric boundary layer. Surface and atmospheric observations are used in combination with the coupled surface–atmosphere model Meso-NH to reveal the mechanisms at play. It is shown that the marinada is generated by the advection of a cool marine air mass over the Catalan Pre-coastal Range by the action of the sea breeze and the upslope wind. This marine air mass then flows into the Ebro basin, creating what is known as the marinada. The characteristics and dynamics of the marinada allow it to be classified as a fall wind. It is also shown that the arrival, propagation and decay of the marinada is strongly dependent on the larger-scale weather situation: westerlies or thermal low. The current study provides a consistent framework for understanding the marinada, paving the way for better modeling and prediction of the phenomenon.

中文翻译：

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埃布罗次盆地东部的马里纳达秋风：物理机制以及海洋、地形和灌溉的作用


摘要。在加泰罗尼亚一年中温暖的月份里，海洋空气越过沿海山脉到达埃布罗次盆地东部。这种现象称为 marinada，最近 Jiménez 等人首次对其进行了彻底的表征。 （2023），基于地表气候数据。然而，其到达和传播所涉及的主要物理机制仍有待发现。这项研究旨在了解海泡是如何形成的以及它如何与已经发育的大气边界层相互作用。地表和大气观测与地表-大气耦合模型 Meso-NH 相结合，揭示了其中的机制。结果表明，海风是在海风和上升风的作用下，加泰罗尼亚前海岸山脉上空的冷海洋气团平流产生的。然后，这些海洋气团流入埃布罗盆地，形成所谓的海港。码头的特征和动态使其被归类为秋风。研究还表明，海泡的到达、传播和衰退在很大程度上取决于更大范围的天气情况：西风或低热气流。目前的研究为理解腌料提供了一个一致的框架，为更好地建模和预测这一现象铺平了道路。