Jet Stream Winds: Enhanced Aircraft Data Acquisition and Analysis

在北方冬季，副热带急流 一条小溪从北方非洲、波斯湾和 从红海到喜马拉雅山。 数值实验， 理论模型已经给出了一些指示， 对流层和平流层的波振幅是 对副热带急流的扰动很敏感 一个庞大而 平流层波振幅的快速增加是一种公认的 “突然变暖”的前兆;在“突然变暖”期间， 北极附近10毫巴的温度可增加40-60 平均纬向风可以从 向西转向东。 不幸的是，对这一现象的常规高空观测 副热带急流非常稀少。 气象 商业航班上记录的信息可能具有 使用. 然而，这些信息通常不会到达任何 全球主要天气预报中心。 根据本 特南鲍姆教授将与英国航空公司合作， 收集某些飞行路径的气象记录 在亚热带急流的区域。 特南鲍姆教授会 然后分析这些数据，评估天气的表现， 在这个数据稀疏区域中的预测模型，并且，如果被警告， 进行数据同化试验。>//

During the Northern Hemisphere winter, the subtropical jet stream stretches from the northern Africa, the Persian Gulf and Red Sea regions to the Himalayas. Numerical experiments with theoretical models have given some indication that the stationary wave amplitudes in both troposphere and stratosphere are sensitive to perturbations in the subtropical jet. A large and rapid increase in stratospheric wave amplitude is a recognized precursor to "sudden warming"; during a "sudden warming", the temperature at 10 mb near the north pole can increase by 40-60 degrees in a week, and the mean zonal wind can reverse from a westerly to an easterly direction. Unfortunately the routine upper air observations of this subtropical jet are extremely sparse. The meteorological information recorded on commercial flights can be of potential use. However, this information generally does not reach any of the major weather prediction centers worldwide. Under this award, Professor Tenenbaum will work with the British Airways to collect the meteorological recordings from certain flight paths in the region of the subtropical jet. Professor Tenenbaum will then analyze this data, evaluate the performance of weather prediction models in this data sparse region, and, if warrented, conduct data assimilation experiments. >//