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.

降水系统通常被组织成带状 结构. 这些结构包括飓风雨带和 与低压中心有关的降水带。 经常 最大的降水发生在这些带中。 据认为，带状构造与 大气中的不稳定性称为条件对称 不稳定性（CSI）。 使用先进的数值模型， 首席研究员将继续进行一系列研究， 包括评估各种大气强迫条件以及它们如何 影响CSI。 将特别注意辐射和 地面强迫项 如果成功，这项研究将提供更好的 了解并可能更好地预测带状 沉淀结构