Effects of Melting on Frontogenesis
Effects of Melting on Frontogenesis
复制标题
融化对锋生的影响
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
R. Stewart
中科院分区：
文献类型：
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作者：
K. Szeto;R. Stewart
摘要用一个包含冰相微物理的二维云模式模拟锋面降水系统。尽管在模拟中使用了理想化的锋生强迫，锋区及其相关的云和降水场的一些观察到的特征再现在模拟中。研究了融雪对地面锋生的影响。研究发现，在冬季风暴环境中，融雪的冷却作用显著地加速了地面锋生，尤其是当融雪层靠近地面时。然而，在模式中的稳态表面锋面强度是不敏感的融化的影响。精细尺度的热量和运动学扰动内的锋区附近的熔化水平，很相似，最近在文献中报道的，是显而易见的模型结果。模式结果的分析表明，从融化的雪冷却可能会导致这些热量和运动学扰动，并可能增强斜压性，…
Abstract Frontal precipitation systems are simulated with a 2D cloud model including ice-phase microphysics. Despite the use of idealized frontogenetic forcing in the simulations, some observed characteristics of frontal zones and their associated cloud and precipitation fields are reproduced in the simulations. The effects of melting snow on surface frontogenesis is investigated. It is found that the cooling effects of melting snow significantly accelerate surface frontogenesis in winter storm environments, especially when the melting layer is close to the surface. However, the steady-state surface frontal strength in the model is not sensitive to the melting effects. Finescale thermal and kinematic perturbations inside the frontal zone near the melting level, quite similar to those recently reported in the literature, are evident in the model results. Analysis of the model results suggests that cooling from melting snow may induce these thermal and kinematic perturbations and may enhance baroclinicity, ...