The effect of the island of Crete on the Etesian winds over the Aegean Sea
The effect of the island of Crete on the Etesian winds over the Aegean Sea
复制标题
克里特岛对爱琴海埃特西亚风的影响
DOI：
10.1002/qj.49712757604
复制
发表时间：
2001
影响因子：
8.9
通讯作者：
D. Lalas
中科院分区：
文献类型：
--
作者：
V. Kotroni;K. Lagouvardos;D. Lalas
夏季吹过爱琴海的埃特西亚风（北扇风）影响该地区的人类活动。爱琴海的众多岛屿，尤其是克里特岛（爱琴海南部的一座山岛，垂直于地表流）似乎在埃特西亚时期的风场改变中发挥着重要作用。克里特岛山脉四面环水，是主要孤立地形特征的一个很好的例子，它显着改变了区域气流和压力；然而，由于缺乏海上观测站，这种修改很难定义。因此，利用现有的陆地表面和船舶天气观测数据以及 ERS 散射仪风数据来确定爱琴海上风达到最大强度的区域，并评估克里特岛对风场的影响。此外，数值模型用于提供对地形扰动风流的进一步了解。使用流体静力模型 BOLAM 进行的灵敏度测试表明，埃特西亚风流与克里特岛山脉的相互作用导致埃特西亚风在上游近 120 公里处减速，空气在接近山脉时向左偏转，并导致该岛以东的气流增强。
The Etesians (northern sector winds), which blow over the Aegean Sea during summer, affect human activities in the area. The numerous islands of the Aegean and especially Crete (a mountainous island in the southern Aegean oriented perpendicular to the surface flow) seem to play an important role in the modification of the wind field during the Etesians. The Crete mountain ranges, surrounded as they are by water, are an excellent example of a major isolated topographic feature which significantly modifies the regional airflow and pressure; however, this modification can hardly be defined due to the lack of observing stations over the sea. For this reason, the available land surface and ship synoptic observations are used, together with ERS scatterometer wind data in order to identify the regions over the Aegean where the wind reaches its maximum intensity, and to assess the influence of Crete on the wind field. Moreover, numerical modelling is used to provide some further insight on the orographically disturbed wind flow. Sensitivity tests performed with the hydrostatic model BOLAM show that the interaction of the Etesian wind flow with the mountains of Crete produces deceleration of the Etesians up to almost 120 km upstream, the leftward deflection of the air as it approaches the mountains, and the associated intensification of the flow east of the island.