Stratosphere-troposphere Coupling during Anticyclogenesis

该项目旨在了解对流层阻塞事件如何导致平流层突然变暖（SSW）。 先前的研究已经显示了一个统计上显着的关系，其中大多数SSW之前的阻塞事件，但大多数的阻塞事件没有遵循SSW。 这项研究的目的是确定是什么因素导致一些块扰动平流层，而另一些块则没有。 本研究结合再分析资料的动力诊断和理想化大气模式的数值试验进行，具有重要的实际意义和科学价值，因为SSW会影响随后的天气，特别是与冷空气爆发有关。 因此，这项研究的结果可能是长期天气预报的兴趣。 此外，该项目还资助了两名研究生，从而培养了该领域的下一代研究人员。

This project seeks to understand how tropospheric blocking events lead to stratospheric sudden stratospheric warmings (SSWs). Previous research has shown a statistically significant relationship in which most SSWs are preceded by blocking events, yet the majority of blocking events are not followed SSWs. The goal of this research is to determine what factors cause some blocks to perturb the stratosphere while others do not. The research is conducted through a combination of dynamical diagnosis of reanalysis datasets and numerical experiments conducted with an idealized atmospheric model.The research topic is of practical importance as well as scientific interest, as SSWs are known to affect subsequent weather and are particularly associated with cold air outbreaks. Results of this research may thus be of interest for long-range weather forecasting. In addition, the project supports two graduate students, thereby providing for the next generation of researchers in this area.