{"id":39182,"date":"2025-09-27T17:29:33","date_gmt":"2025-09-27T15:29:33","guid":{"rendered":"https:\/\/karmaka.de\/?p=39182"},"modified":"2025-10-07T06:59:36","modified_gmt":"2025-10-07T04:59:36","slug":"effect-of-a-fine-scale-layered-structure-of-the-atmosphere-on-infrasound-signals-from-fragmenting-meteoroids","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=39182","title":{"rendered":"Effect of a Fine-Scale Layered Structure of the Atmosphere on Infrasound Signals from Fragmenting Meteoroids<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Igor P. Chunchuzov, Oleg E. Popov, Elizabeth A. Silber &amp; Segey N. Kulichkov<\/p>\n\n\n\n<p>Pure and Applied Geophysics, Published: 26 September 2025<\/p>\n\n\n\n<p><a href=\"https:\/\/link.springer.com\/article\/10.1007\/s00024-025-03835-7\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/2510.03655\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;We investigate the influence of a fine-scale (FS) layered structure in the atmosphere on the propagation of infrasound signals generated by fragmenting meteoroids. Using a pseudo-differential parabolic equation (PPE) approach, we model broadband acoustic signals from point sources at altitudes of 35\u2013100 km. The presence of FS fluctuations in the stratosphere (37\u201345 km) and the lower thermosphere (100\u2013120 km) modifies ray trajectories, causing multiple arrivals and prolonged signal durations at ground stations. In particular, meteoroids fragmenting at 80\u2013100 km can produce two distinct thermospheric arrivals beyond 150 km range, while meteoroids descending to 50 km or below yield weak, long-lived arrivals within the acoustic shadow zone via antiguiding propagation and diffraction. Comparison with observed infrasound data confirms that FS-layered inhomogeneities can account for multi-arrival \u201cN-waves,\u201d broadening potential interpretations of meteoroid signals. The results also apply to other atmospheric-entry objects, such as sample return capsules, emphasizing how FS structure impacts shock wave propagation. Our findings advance understanding of wavefield evolution in a layered atmosphere and have broad relevance for global infrasound monitoring of diverse phenomena (e.g., re-entry capsules, rocket launches, and large-scale explosions).&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Igor P. Chunchuzov, Oleg E. Popov, Elizabeth A. Silber &amp; Segey N. Kulichkov Pure and Applied Geophysics, Published: 26 September 2025 LINK PDF (OPEN ACCESS) &#8220;We investigate the influence of a fine-scale (FS) layered structure&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96,97],"tags":[185,4594,3716,226,3715,3683],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/39182"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39182"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/39182\/revisions"}],"predecessor-version":[{"id":39230,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/39182\/revisions\/39230"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39182"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39182"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}