Large aperture microbarograph array in Western Bohemia. First two years of observations.

0503829 - ÚFA 2020 DE eng A - Abstract
Šindelářová, Tereza - Kozubek, Michal - Chum, Jaroslav - Baše, Jiří
Large aperture microbarograph array in Western Bohemia. First two years of observations.
Geophysical Research Abstracts. Vol. 21. Göttingen: European Geosciences Union, 2019. EGU2019-3947-1.
[EGU General Assembly 2019. 07.04.2019-12.04.2019, Vienna]
Institutional support: RVO:68378289
Keywords : microbarograph * infrasound
OECD category: Meteorology and atmospheric sciences
https://meetingorganizer.copernicus.org/EGU2019/EGU2019-3947-1.pdf

A large aperture array WBCI was installed in the western part of the Czech Republic (50.25◦N 12.44◦E) in September 2016. The array consists of four absolute sensors of the type 6000-16B-IS by Paroscientific, inc. The array aperture is ∼6 km. It is intended for observations of low frequency infrasound near the acoustic cut-off in the range 0.0033-0.4 Hz. The data are analysed using the PMCC software by CEA/DASE . The detection bulletins were processed for the period October 2016 – September 2018. In winter (NovemberFebruary), the signals regularly arrived from azimuths of 200-235◦ , 305-330◦ , and 340-355◦ . ◦ . In these directions, the Alps, the Northern Atlantic, and the Scandinavian mountains are located with respect to the WBCI site. The wave frequencies were between 0.01 and 0.08 Hz. The north-west arrivals (305-330◦ and 340-355◦ ) occurred in time periods, when distinct lows and pressure gradients were formed above the Northern Atlantic. The observations of microbaroms (f ∼0.2 Hz) are reduced to periods of extreme weather above the Northern Atlantic, like e.g. the storm Ophelia in October 2018. No prevailing directions of infrasound arrival were identified in summer (May-August).
Permanent Link: http://hdl.handle.net/11104/0295612