Transport Dynamics in the Stratosphere

平流层的传输动力学

• 批准号: 0091514
• 负责人: Xun Zhu
• 金额: $ 9.94万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-01 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0091514&HistoricalAwards=false
• 关键词: Transport; Dynamics; Stratosphere

The goal of this project is to use a two-dimensional (latitude-height) chemical-dynamical model to investigate the reasons for wide variations in the mean-age of stratospheric air in model simulations. The mean-age conveys information about the parcel transport time scales in the lower stratosphere in the presence of diffusion, when photochemical processes occur along parcel trajectories. The impact of horizontal mixing, stratospheric oscillations (quasi-biennial and semi-annual), and mesospheric photochemical destruction on the mean-age of stratospheric air will be examined. Dr. Zhu's theoretical and modeling analysis will help clarify the physical and mathematical basis for the age-of-air concept, and lead to its more accurate estimation. The Large-scale Dynamic Meteorology Program funds this award.

该项目的目标是使用一个二维（纬度-高度）化学动力学模型，调查模型模拟中平流层空气平均年龄大幅度变化的原因。平均年龄传达的信息包裹运输时间尺度在平流层下部的扩散的存在下，当光化学过程发生沿着包裹轨迹。将研究水平混合、平流层振荡（准两年期和半年期）和中层光化学破坏对平流层空气平均年龄的影响。朱博士的理论和模型分析将有助于澄清空气年龄概念的物理和数学基础，并导致其更准确的估计。大规模动态气象学计划为该奖项提供资金。