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

该项目的目标是调查平流层准两年振荡(QBO)对热带区域对流和降水的影响，包括飓风的成因。PI和他的合作者将分析各种数据集(传出长波辐射、高反射云、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对热带上层对流层风、温度和辐射场的影响。影响将使用几种技术来确定，包括在东风和西风QBO阶段对场进行直接合成。由于QBO是一种相当规则的低频振荡，它对对流层顶环境的影响是潜在的可以预测的。希奇曼博士认为，QBO的影响也很显著，该项目将推进对热带气候的长期预测。大型动力气象学和气候动力学项目共同资助了这一奖项。

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.