Baroclinic Wave Lifecycle and Storm Track Dynamics

斜压波生命周期和风暴轨迹动力学

• 批准号: 9731393
• 负责人: Richard Lindzen
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731393&HistoricalAwards=false
• 关键词: Baroclinic; Wave; Lifecycle; Storm; Track

9731393 Chang The weather and climate in the mid-latitudes are affected by the passage of cyclones and anticyclones. These systems are generally associated with waves in the upper troposphere which are organized into well defined regions known as storm tracks. Better understanding how the storm tracks form, how they evolve and what determines their location and intensity may help to advance the accuracy of medium range weather forecasting. Dr. Chang's recent results from data analyses and modeling studies suggest that mid-latitude baroclinic waves in these storm tracks are organized into wave packets which propagate eastward with group velocities much faster than the phase speeds of individual waves. The energy associated with these wave packets may contribute to the formation and development of upper level troughs and surface cyclones. Under this award, the principal investigator will extend his earlier results on the properties of wave packets and examine what role they might play in atmospheric predictability.

9731393 Chang latududes中的天气和气候受到旋风和反气旋的通过的影响。 这些系统通常与对流层上部的波浪相关，这些波浪被组织成被称为风暴轨迹的良好区域。 更好地了解风暴轨迹的形成方式，如何发展以及什么决定其位置和强度可能有助于提高中等范围的天气预报的准确性。 Chand博士来自数据分析和建模研究的最新结果表明，这些风暴轨迹中的纬度斜斜线被组织到波数据包中，这些波浪包的传播速度比单个波的相位速度快得多。 与这些波数据包相关的能量可能有助于上层槽和表面旋风的形成和发展。 根据该奖项，首席研究人员将扩展他对波数据包的特性的早期结果，并检查它们在大气可预测性中的作用。