Abstract
Infrasound has a long history of monitoring sudden stratospheric warmings. Several pioneering studies have focused on the various effects of a major warming on the propagation of infrasound. A clear transition has been made from observing anomalous signatures towards the use of these signals to study anomalies in upper atmospheric conditions. Typically, the infrasonic signature of a major warming corresponds to summer-like infrasound characteristics observed in midwinter. More subtile changes occur during a minor warming, recognisable by the presence of a bidirectional stratospheric duct or propagation through a warm stratosphere leading to small shadow zones. A combined analysis of all signal characteristics unravels the general stratospheric structure throughout the life cycle of the warming. A new methodology to evaluate the state of the atmosphere as represented by various weather and climate models is demonstrated. A case study comparing regional volcano infrasound with simulations using various forecast steps indicates significant differences in stratospheric forecast skill, associated with a data assimilation issue during the warming.
Original language | English |
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Title of host publication | Infrasound Monitoring for Atmospheric Studies |
Subtitle of host publication | Challenges in Middle Atmosphere Dynamics and Societal Benefits: Second Edition |
Editors | A. Le Pichon, E. Blanc, A. Hauchecorne |
Place of Publication | Cham |
Publisher | Springer |
Chapter | 23 |
Pages | 723-755 |
Number of pages | 33 |
Edition | 2 |
ISBN (Electronic) | 978-3-319-75140-5 |
ISBN (Print) | 978-3-319-75138-2 |
DOIs | |
Publication status | Published - 2019 |