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j.jseaes.2010.02.001.pdf | 622.73 kB | Adobe PDF | 見る/開く |
タイトル: | Infrared thermography of the fumarole area in the active crater of the Aso volcano, Japan, using a consumer digital camera |
著者: | Furukawa, Yoshitsugu ![]() ![]() |
著者名の別形: | 古川, 善紹 |
キーワード: | Infrared thermography Fumarole Digital camera Active crater Aso volcano |
発行日: | 1-Jun-2010 |
出版者: | Elsevier Ltd |
誌名: | Journal of Asian Earth Sciences |
巻: | 38 |
号: | 6 |
開始ページ: | 283 |
終了ページ: | 288 |
抄録: | Thermal information of volcanoes is crucial for understanding their magmatic activity. In active volcanoes, the fumarole temperature is measured in order to monitor the magmatic activity. In this study, a consumer digital camera has been used as an infrared thermometer in order to obtain the infrared images for a fumarole area in the active crater of the Aso volcano, Japan; the temperature of the fumaroles that are more than a few centimeters in diameter can be estimated from the recorded images. The aperture value and the exposure time of the digital camera can be optimized manually, and clear images can be obtained in a wider temperature range of fumaroles by using the digital camera than by the consumer camcorder used in the previous study. The spatial resolution can also be chosen by changing the lens. The sensor of the digital cameras is sensitive to the near-infrared wavelengths of light, and the temperature estimation by using light of these wavelengths is robust against disturbances such as atmospheric absorption. The temperature, size, and spatial distribution of the fumaroles estimated by using this thermometer are considered to be more reliable than those measured by the dedicated thermometer used in the Aso volcano and the consumer camcorder used in the previous study. The thermometer used in this study is handy and cost-effective. Moreover, it has better temperature and spatial resolutions for monitoring high-temperature volcanic activity. |
著作権等: | © 2010 Elsevier Ltd This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/128901 |
DOI(出版社版): | 10.1016/j.jseaes.2010.02.001 |
出現コレクション: | 学術雑誌掲載論文等 |
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