熱赤外放射温度計による大島周辺変色水及び三原山噴火口の温度測定

概要

論文の詳細を見る
As a part of the national program on the prediction of volcanic eruptions, the Hydrographic Department is conducting the investigations by the remote sensing technique on the submarine volcanoes and the volcanic islands. After Miharayama erupted on Nov. 15, 1986, the Hydrographic Department made 14 time-observations of discolored waters around Osima and craters of Osima Miharayama by the airborne thermal infrared radiometer AGA 780 from Nov. 22, 1986 to Mar. 18, 1987. The results are: (1) Temperature of discolored waters around Osima was lower than that of sea water surrounding discolored water of about 1〜2℃, and there was no higher-temperature discolored water. (2) If the discolored water was dense, the origin of it coincided with the lower temperature area of the sea water many times and correlation between the area of the discolored water and the isotherm lines was good. (3) There were many lower temperature areas without the discolored water. (4) If the discolored water was thin, correlation between the area of the discolored water and the isotherm lines was bad. (5) It was suitable to make thermal observations before sunrise to detect the distributions of the sea surface temperature in detail. (6) In the daytime observations sea surface temperature was apt to show no thermal distribution pattern. (7) Temperature of the A crater (crater opened at the south wall of the old crater) had kept high temperature. (8) Temperature of the B craters (craters opened at the north rim of the old crater) showed a tendency to decrease. Temperature of the B craters on Mar. 17 was rather high. (9) Temperature of the C craters (craters opened on the flank of Miharayama) showed a strong tendency to decreae. Temperature of the C craters on Mar. 17 was nearly even to the ground temperature. (10) Temperature of the A crater, the B craters and the C craters became higher together before the small eruption on Dec. 18, 1986. As the observation conditions were differed at every observation time, careful consideration should be required to discuss the relation between the volcanic activities and the observed temperature of the craters.
特定非営利活動法人日本火山学会の論文
1988-04-01

熱赤外放射温度計による大島周辺変色水及び三原山噴火口の温度測定

スポンサーリンク

概要

著者

関連論文

スポンサーリンク