A Study of the Effect of a Time-Varying Moist Potential Vorticity on the Evolution of Conditional Symmetric Instability

时变湿位涡对条件对称不稳定性演化的影响研究

• 批准号: 9019010
• 负责人: Thomas Warner
• 金额: $ 2.36万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-01 至 1991-09-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019010&HistoricalAwards=false
• 关键词: Study; Effect; Time; Varying; Moist

Often precipitation systems are organized into banded structures. These structures include hurricane rainbands and precipitation bands associated with low pressure centers. Often the heaviest precipitation occurs in these bands. It is believed that banded structures are associated with instabilities in the atmosphere know as conditional symmetric instability (CSI). Using an advanced numerical model, the Principal Investigator will continue a line of research that involves assessing various atmospheric forcing terms and how they effect the CSI. Special attention will be paid to radiation and surface forcing terms If successful, this research will provide better understanding and potentially better prediction of banded precipitation structures.

通常将降水系统组织到带状结构中。 这些结构包括飓风雨带和与低压中心相关的降水带。 通常，最重的降水发生在这些带中。 据信，带状结构与大气中的不稳定性有关，称为条件对称不稳定性（CSI）。 使用高级数值模型，主要研究者将继续进行一项研究，其中涉及评估各种大气强迫术语及其对CSI的影响。 如果成功，将特别注意辐射和表面强迫术语，这项研究将提供更好的理解，并可能更好地预测带状降水结构。