Equatorial Dynamical Meteorology

赤道动力气象学

• 批准号: 9123797
• 负责人: Timothy Dunkerton
• 金额: $ 17.89万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-15 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123797&HistoricalAwards=false
• 关键词: Equatorial; Dynamical; Meteorology

The variability of the mean-flow of the equatorial middle atmosphere is dominated by the quasi-biennial and semiannual oscillations (QBO and SAO). Dr. Dunkerton will continue his investigation of the dynamics of these oscillations, emphasizing the theory of nonlinear mean meridional circulations in the middle atmosphere, their effect on the east and west phases of SAO and QBO, the effect of localized aerosol heating in the tropics (e.g., the circulation changes which result from volcanic eruptions like Mt. Pinatubo) and mechanisms of coupling the QBO to the high- latitude polar vortex. The stability of equatorial Rossby-wave critical layers will be investigated, focussing on the role of equatorial inertial instabilities on a nonparallel basic state distorted by Rossby waves from midlatitudes. Excitation and propagation of equatorial waves in the tropical troposphere will also be addressed. This research is important not only for basic understanding of the structure and dynamics of the middle atmosphere, but also for understanding short-term climate variability.

赤道中层平均气流的变率 大气以准二年生和半年生为主 振荡（QBO和SAO）。 邓克顿医生将继续他的 研究这些振荡的动力学，强调 中尺度非线性平均纬向环流理论 它们对SAO东、西位相的影响， QBO，热带地区局部气溶胶加热的影响（例如， 火山爆发导致的环流变化， 山皮纳图博）和机制耦合的QBO的高- 纬度极涡 赤道Rossby波的稳定性 将对关键层进行调查，重点关注以下方面的作用 非平行基态上的赤道惯性不稳定性 被中纬度的罗斯贝波扭曲 激发和 赤道波在热带对流层的传播将 也要加以解决。 这项研究不仅对基本了解 中层大气的结构和动力学， 了解短期气候变化。