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AN EARLY-AUTUMN POLAR LOW FORMATION OVER THE NORWEGIAN SEA

机译:挪威海上的早秋极地层

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Around October 15, 1993, an unusual polar low formation took place over the Norwegian Sea. The evolution is studied by means of the HIRLAM forecasting model at the Danish Meteorological Institute, satellite imagery and observations. The investigation, to some extent based on generalized forms of the equations for omega and geopotential tendency, reveals that the disturbance forms initially by baroclinic instability along a frontal zone within a maritime polar air mass and in close proximity of an intense extratropical cyclone. During its growth to a polar low, air-sea interaction seems to work in conjunction with the baroclinic process. A parallel forecast with the latent heat set to zero shows that heating of the atmosphere, associated with precipitation, is necessary for the polar low formation. [References: 29]
机译:大约在1993年10月15日,挪威海上空发生了一次异常的极地低层。通过丹麦气象研究所的HIRLAM预报模型,卫星图像和观测资料研究了这一演变过程。这项研究在某种程度上基于欧米茄和地势趋势方程的一般形式,揭示了扰动最初是由海洋极地气团内的锋区和强烈的温带气旋附近的斜压不稳定引起的。在增长到极低的过程中,海气相互作用似乎与斜压过程一起起作用。将潜热设为零的并行预测表明,与极地低压形成有关的是,与降水相关的大气加热是必要的。 [参考:29]

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