Regional Modulation of Tropical Deep Convection by the Quasi-Biennial Oscillation

准两年期振荡对热带深对流的区域调制

• 批准号: 0004207
• 负责人: Matthew Hitchman
• 金额: $ 10万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0004207&HistoricalAwards=false
• 关键词: Regional; Modulation; Tropical; Deep; Convection

The goal of this project is to investigate the influence of stratospheric quasi-biennial oscillation (QBO) on regional convection and precipitation in the tropics, including hurricane genesis. The PI and his collaborators will analyze various data sets (Outgoing Longwave Radiation, Highly Reflective Cloud, and the National Centers for Environmental Prediction (NCEP) and European Centre for Medium-Range Weather Forecasting (ECMWF) reanalysis data sets) to document the QBO impact on tropical upper-tropospheric wind, temperature, and radiation fields. The impacts will be determined using several techniques, including straightforward compositing of fields during the easterly and westerly QBO phases. Since QBO is a fairly regular low-frequency oscillation, its impact on tropopause environment is potentially predictable. Dr. Hitchman argues that the QBO impacts are also significant, and that the project will advance long-range forecasting of tropical climate. The Large-scale Dynamic Meteorology and Climate Dynamics programs are co-funding this award.

本项目旨在研究平流层准两年生振荡（QBO）对热带地区对流和降水的影响，包括飓风的形成。PI和他的合作者将分析各种数据集（输出长波辐射，高反射云，以及国家环境预测中心（NCEP）和欧洲中期天气预报中心（ECMWF）再分析数据集），以记录QBO对热带对流层上层风，温度和辐射场的影响。将使用几种技术来确定影响，包括直接合成QBO东西向阶段的油田。由于QBO是一个相当规律的低频振荡，它对对流层顶环境的影响是可以预测的。希契曼博士认为，QBO的影响也很重要，该项目将推进热带气候的长期预报。大尺度动态气象学和气候动力学项目共同资助了该奖项。