{"_buckets": {"deposit": "7e525353-90fc-4abc-a3b5-1c43b3035f6e"}, "_deposit": {"id": "2928", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2928"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00002928", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2021-06-05", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "1985", "bibliographicPageStart": "1975", "bibliographicVolumeNumber": "226", "bibliographic_titles": [{"bibliographic_title": "Geophysical Journal International", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "SUMMARY\n\n Tsunamis are often modelled as surface gravity waves of incompressible homogenous water propagating over a rigid seafloor. Previous studies have noted that when computing long-period tsunamis travelling at trans-oceanic distances with dominant periods of thousands of seconds, we need to consider four factors that are not included in the surface gravity wave theory: compressibility of seawater, density stratification of oceans, elasticity of the Earth and gravitational potential change associated with the tsunami motion. However, their effects on short-period tsunamis with dominant periods below 1000?s have not been examined. Here, we investigate how the four factors influence short-period tsunamis. Theoretical analyses and 1-D simulations using phase speeds of different tsunami models indicate that the resultant phase delay of short-period tsunamis becomes apparent after ?1000?km propagation, mainly because of the first three factors. We then introduce a new phase correction method for dispersive short-period tsunamis with consideration of period-dependent ray paths and apply it to a 2-D simulation of a short-period tsunami from a submarine volcanic earthquake near Japan in 2015. The correction of the traveltime of a synthetic waveform by including the four factors amounts to ?40?s at a distant station 1430?km away from the source, whereas the effects of the four factors on the waveforms are negligibly small at stations \u0026amp;lt; ?500km from the source. The observed traveltime at the ocean bottom pressure (OBP) gauge with a sampling interval at 15?s of the distant station can be explained only when these factors are incorporated into synthetic waveforms, indicating the effects due to the four factors are detectable by high-sampling OBP gauges that are deployed over broad oceanic regions.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "Oxford University Press (OUP)", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1093/gji/ggab192"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1365-246X", "subitem_source_identifier_type": "EISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Osamu Sandanbata", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Shingo Watada", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Tung-Cheng Ho", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Kenji Satake", "creatorNameLang": "en"}]}]}, "item_title": "Phase delay of short-period tsunamis in the density-stratified compressible ocean over the elastic Earth", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Phase delay of short-period tsunamis in the density-stratified compressible ocean over the elastic Earth", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/2928", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "2928", "relation": {}, "relation_version_is_last": true, "title": ["Phase delay of short-period tsunamis in the density-stratified compressible ocean over the elastic Earth"], "weko_shared_id": -1}