JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI30] [JJ] Earth and planetary informatics with huge data management

Mon. May 22, 2017 10:45 AM - 12:15 PM 201A (International Conference Hall 2F)

convener:Ken T.Murata(National Institute of Information and Communications Technology), Kazuo Ohtake(Japan Meteorological Agency), Susumu Nonogaki(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Takeshi Horinouchi(Faculty of Environmental Earth Science, Hokkaido University), Chairperson:Ken Murata(National Institute of Information and Communications Technology), Chairperson:Rie Honda(Department of Information Science, Kochi University)

11:45 AM - 12:00 PM

[MGI30-11] Automatic extraction and tracking of hot spots from time-series three dimensional grid data - application to meteorological radar data -

Ryo Hayashi1, *Rie Honda1, Shinsuke Sato2, Ken T. Murata2, Kazuya Muranaga3, Kentaro Ukawa3, Koji Sassa1, Fumie Murata1 (1.Department of Information Science, Kochi University, 2.National Institute of Infomation and Communication Technology, 3.System Engineering Consultation Co., LTD)

Keywords:data mining, knowledge discovery, mixture model, phased array meteorological radar

A large amount of time-series three dimensional data has been accumulated also in the field of Earth and planetary science. We have developied a method of automatic extraction and tracking of hot spot areas included in a time-series three dimensional data, aiming to discover spatio-temporal pattens from them. The distribution of hot spots is modeled by a mixture of multivariate normal distribution. Hot spots are then extracted by obtaining the model parameters via EM algorithm. We used position of the grid data where the observed value exceeds the threshold as input in previous study. We modified this method to use data values themselves as weight coefficients during EM algorithm. The method was applied to synthetic data and real data of phased array meteorological radar data and the accuracy of detected number of hot spots was siginificantly imporoved. We are aiming to apply this method to detection of localized heavy rainfall precursor from 3D meteorological radar data.