Accurate meteorological modeling is critical for obtaining realistic atmospheric transport and dispersion (T&D) predictions. There are several data assimilation (DA) techniques used to improve meteorological results. Two common philosophies are nudging and variational DA. Traditionally, nudging is used in T&D, whereas more sophisticated variational techniques are used in weather forecasting....
In routine processing of IMS infrasound data at the IDC, microbaroms with dominant frequencies ranging from 0.1 to 0.5 Hz appear in overlapping frequency bands and are considered as noise. In this study, microbarom signals were used as calibration signals, and their amplitudes at the German infrasound station IS26 were modelled based on operational ocean wave interaction simulations and a...
The experimental results of studying the effect of a fine-scale layered structure of a stably stratified atmospheric boundary layer (ABL) on fluctuations of the parameters of acoustic pulses generated with a certain period (1 min) by an artificial detonation source are presented. The vertical profiles of wind velocity fluctuations in the thin layers of the ABL have been retrieved using the...
Cosmogenic radionuclides beryllium-7 and sodium-22 are known atmospheric tracers and can be used together in a lock-in technique to effectively trace vertical air masses based on surface measurements. This technique allows to study progression and speed of atmospheric cells. Data show that the cells are decelerating during the summer period which is extending in time. This is caused by warming...
In this study we examined 344 bolides (airbursts) reported on the JPL CNEOS website (https://cneos.jpl.nasa.gov/fireballs/) between 2007-2018 and attempt to correlate these with infrasound detections. We found 206 of these bolides were detectable by at least one infrasound station while only 42 were automatically registered as part of the Reviewed Event Bulletin (REB) issued daily by CTBTO....
The NEar real-time MOnitoring system, called NEMO, is a project for world-wide and near real-time monitoring of bright fireballs, currently under development. NEMO is based on an alert system collecting information on fireball events and will be a combined world-wide database for large fireball events with the goal to analyse and combine data of these events from various data sources to...
