{"_buckets": {"deposit": "f934a6a8-28a9-49c2-adf0-fcdc1abd7759"}, "_deposit": {"id": "4758", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4758"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004758", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2009-06", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "965", "bibliographicPageStart": "958", "bibliographicVolumeNumber": "177", "bibliographic_titles": [{"bibliographic_title": "GEOPHYSICAL JOURNAL INTERNATIONAL", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "The scattering coefficient is one of the most fundamental parameters by which to quantify the scattering intensity for waves as a function of scattering angle and wave frequency. This study presents a derivation of the scattering coefficient for linear long-wave tsunami equations in randomly fluctuating sea-bottom topography using the first-order Born approximation. The scattering coefficient is directly related to the power spectrum density function of fluctuations in the bottom topography and shows a strong tsunami-wavelength dependence. The scattering regime is determined by the normalized wavenumber ak, where k is the tsunami wavenumber and a is the correlation distance of the fluctuating sea-bottom topography. The scattering pattern for small wavenumbers, ak \u0026lt;\u0026lt; 1, is symmetric in the forward and backward directions, whereas the pattern for large wavenumbers, ak \u0026gt;\u0026gt; 1, shows small-angle scattering around the forward direction. Based on the theoretically derived scattering coefficient, we evaluate the excitation of tsunami coda and leading-wave attenuation as a function of the normalized wavenumber. The coda energy for small wavenumber ak \u0026lt;\u0026lt; 1 is proportional to k(3), whereas the energy for large wavenumber ak \u0026gt;\u0026gt; 1 is proportional to k(-p+3) when the power spectral density function of the sea-bottom fluctuation is characterized by a power law with the exponent of -p in large wavenumber. The scattering attenuation represented by the inverse of the quality factor (Sc)Q(-1) is proportional to k(2) for small wavenumber ak \u0026lt;\u0026lt; 1, whereas (Sc)Q(-1) is proportional to k(-p+2) for large wavenumber ak \u0026gt;\u0026gt; 1.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "WILEY-BLACKWELL PUBLISHING, INC", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1111/j.1365-246X.2009.03988.x"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0956-540X", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Tatsuhiko Saito", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Takashi Furumura", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "Scattering of linear long-wave tsunamis due to randomly fluctuating sea-bottom topography: coda excitation and scattering attenuation", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Scattering of linear long-wave tsunamis due to randomly fluctuating sea-bottom topography: coda excitation and scattering attenuation", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4758", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4758", "relation": {}, "relation_version_is_last": true, "title": ["Scattering of linear long-wave tsunamis due to randomly fluctuating sea-bottom topography: coda excitation and scattering attenuation"], "weko_shared_id": -1}