{"_buckets": {"deposit": "2ba1b34a-82e4-4242-b6a7-9e48d9338173"}, "_deposit": {"id": "4563", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4563"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004563", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2012-08", "bibliographicIssueDateType": "Issued"}, "bibliographicPageStart": "B08204", "bibliographicVolumeNumber": "117", "bibliographic_titles": [{"bibliographic_title": "Journal of Geophysical Research: Solid Earth", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "We investigated the coupled effects of gas escape and crystallization on the dynamics of lava dome eruptions using a one-dimensional conduit flow model. The relationship between chamber pressure p(ch) and mass flow rate q for steady conduit flow commonly has a regime of negative differential resistance (i.e., dp(ch)/d(q) \u0026lt; 0), which causes a transition from lava dome to explosive eruption. Two positive-feedback mechanisms that result in negative differential resistance have been identified. First, effective magma viscosity decreases with increasing q because of a delay of crystallization, leading to reduced viscous wall friction (feedback 1). Second, magma porosity increases with increasing q because of less efficient gas escape, leading to reduced gravitational load (feedback 2). For high-phenocryst-content magma (volume fraction \u0026gt;0.5), feedback 1 is the main mechanism that forms negative differential resistance. In this case, the transition from lava dome to explosive eruption occurs when the magma supply rate exceeds a fixed critical value. For low-phenocryst-content magma (volume fraction \u0026lt;0.5), feedback 2 plays a key role so that the transition is controlled by the permeability of the surrounding rocks; the critical magma supply rate remarkably decreases with decreasing permeability. Transition due to feedback 2 is associated with a change in the chemical composition of volcanic gas, a drastic increase in magma porosity from nearly 0 to greater than 0.8, and overpressure at a shallower level, which can be detected from geochemical and geophysical field observations.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "AMER GEOPHYSICAL UNION", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1029/2012JB009343"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "2169-9356", "subitem_source_identifier_type": "EISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "T. Kozono", "creatorNameLang": "ja"}, {"creatorName": "T. Kozono", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "T. Koyaguchi", "creatorNameLang": "ja"}, {"creatorName": "T. Koyaguchi", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "Effects of gas escape and crystallization on the complexity of conduit flow dynamics during lava dome eruptions", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Effects of gas escape and crystallization on the complexity of conduit flow dynamics during lava dome eruptions", "subitem_title_language": "ja"}, {"subitem_title": "Effects of gas escape and crystallization on the complexity of conduit flow dynamics during lava dome eruptions", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4563", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-04-27"}, "publish_date": "2023-04-27", "publish_status": "0", "recid": "4563", "relation": {}, "relation_version_is_last": true, "title": ["Effects of gas escape and crystallization on the complexity of conduit flow dynamics during lava dome eruptions"], "weko_shared_id": -1}