Tracking jet stream winds using ground-based pressure signals
In this project, we aim to measure tropospheric jet stream winds using pressure signals that are measured on ground-based microbarometers. Enhanced monitoring of the jet stream is needed for a better understanding of the role of the jet stream in climate change and extreme weather, which is relevant for Early Warning Centre (EWC) goals.
The goal is to adapt two existing measurement techniques for jetstream sensing. One of the methods relies on the detection of gravity waves while the other technique is based on interferometry of acoustic-gravity waves, i.e., very low frequency sound waves. Both methods are to be applied to global microbarometer networks for which multiple decades of data are available. This allows for both nowcasting and climatological analyses. The resulting dataset will be compared to existing observations (aircraft-based, satellite-based, radiosonde) and weather forecast models.
The project has been jointly defined by a team of KNMI researchers with expertise in seismo-acoustics, meteorology, as well as aircraft and satellite-based observation systems from multiple KNMI R&D departments.
This project will focus on: