Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan
Vulcanian eruptions (short-lived explosions consisting of a rising thermal) occur daily in volcanoes around the world. Such small-scale eruptions represent a challenge in numerical modeling due to local-scale effects, such as the volcano’s topography impact on atmospheric circulation and near-vent p...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-03-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/12/3/331 |
| _version_ | 1827603156278706176 |
|---|---|
| author | Kosei Takishita Alexandros P. Poulidis Masato Iguchi |
| author_facet | Kosei Takishita Alexandros P. Poulidis Masato Iguchi |
| author_sort | Kosei Takishita |
| collection | DOAJ |
| description | Vulcanian eruptions (short-lived explosions consisting of a rising thermal) occur daily in volcanoes around the world. Such small-scale eruptions represent a challenge in numerical modeling due to local-scale effects, such as the volcano’s topography impact on atmospheric circulation and near-vent plume dynamics, that need to be accounted for. In an effort to improve the applicability of Tephra2, a commonly-used advection-diffusion model, in the case of vulcanian eruptions, a number of key modifications were carried out: (i) the ability to solve the equations over bending plume, (ii) temporally-evolving three-dimensional meteorological fields, (iii) the replacement of the particle diameter distribution with observed particle terminal velocity distribution which provides a simple way to account for the settling velocity variation due to particle shape and density. We verified the advantage of our modified model (Tephra4D) in the tephra dispersion from vulcanian eruptions by comparing the calculations and disdrometer observations of tephra sedimentation from four eruptions at Sakurajima volcano, Japan. The simulations of the eruptions show that Tephra4D is useful for eruptions in which small-scale movement contributes significantly to ash transport mainly due to the consideration for orographic winds in advection. |
| first_indexed | 2024-03-09T05:32:45Z |
| format | Article |
| id | doaj.art-e3e7cb5bf60847619ea7e8101c2edd69 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T05:32:45Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-e3e7cb5bf60847619ea7e8101c2edd692023-12-03T12:31:23ZengMDPI AGAtmosphere2073-44332021-03-0112333110.3390/atmos12030331Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, JapanKosei Takishita0Alexandros P. Poulidis1Masato Iguchi2Sakurajima Volcano Research Center, DPRI, Kyoto University, Kagoshima 841-1419, JapanSakurajima Volcano Research Center, DPRI, Kyoto University, Kagoshima 841-1419, JapanSakurajima Volcano Research Center, DPRI, Kyoto University, Kagoshima 841-1419, JapanVulcanian eruptions (short-lived explosions consisting of a rising thermal) occur daily in volcanoes around the world. Such small-scale eruptions represent a challenge in numerical modeling due to local-scale effects, such as the volcano’s topography impact on atmospheric circulation and near-vent plume dynamics, that need to be accounted for. In an effort to improve the applicability of Tephra2, a commonly-used advection-diffusion model, in the case of vulcanian eruptions, a number of key modifications were carried out: (i) the ability to solve the equations over bending plume, (ii) temporally-evolving three-dimensional meteorological fields, (iii) the replacement of the particle diameter distribution with observed particle terminal velocity distribution which provides a simple way to account for the settling velocity variation due to particle shape and density. We verified the advantage of our modified model (Tephra4D) in the tephra dispersion from vulcanian eruptions by comparing the calculations and disdrometer observations of tephra sedimentation from four eruptions at Sakurajima volcano, Japan. The simulations of the eruptions show that Tephra4D is useful for eruptions in which small-scale movement contributes significantly to ash transport mainly due to the consideration for orographic winds in advection.https://www.mdpi.com/2073-4433/12/3/331tephraadvection-diffusion modeldisdrometerSakurajimaTephra2Tephra4D |
| spellingShingle | Kosei Takishita Alexandros P. Poulidis Masato Iguchi Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan Atmosphere tephra advection-diffusion model disdrometer Sakurajima Tephra2 Tephra4D |
| title | Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan |
| title_full | Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan |
| title_fullStr | Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan |
| title_full_unstemmed | Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan |
| title_short | Tephra4D: A Python-Based Model for High-Resolution Tephra Transport and Deposition Simulations—Applications at Sakurajima Volcano, Japan |
| title_sort | tephra4d a python based model for high resolution tephra transport and deposition simulations applications at sakurajima volcano japan |
| topic | tephra advection-diffusion model disdrometer Sakurajima Tephra2 Tephra4D |
| url | https://www.mdpi.com/2073-4433/12/3/331 |
| work_keys_str_mv | AT koseitakishita tephra4dapythonbasedmodelforhighresolutiontephratransportanddepositionsimulationsapplicationsatsakurajimavolcanojapan AT alexandrosppoulidis tephra4dapythonbasedmodelforhighresolutiontephratransportanddepositionsimulationsapplicationsatsakurajimavolcanojapan AT masatoiguchi tephra4dapythonbasedmodelforhighresolutiontephratransportanddepositionsimulationsapplicationsatsakurajimavolcanojapan |