著者 MORIFUJI, Shinya| SUITO, Hiroshi| ROPPONEN, Janne| OKUBO, Kenji|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
著者 NISHIMURA, Shin-ichi| OKUBO, Kenji| MORITA, Hidenori| KOSKIAHO, Jari| TATTARI, Sirrka|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
著者 OKUBO, Kenji| KOSKIAHO, Jari| VENTELÄ, Anne-Mari| HUTTULA, Timo|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
著者 WU, Ting Feng| OKUBO, Kenji| HUTTULA, Timo| ROPPONEN, Janne|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
著者 OKUBO, Kenji| HUTTULA, Timo| SUITO, Hiroshi| ROPPONEN, Janne| MANO, Akiko| NAKAZAWA, Takashi|
発行日 2014-06
出版物タイトル SYKE-OU Project Report
資料タイプ 研究報告書
JaLCDOI 10.18926/fest/11615
フルテキストURL 001_077_089.pdf
著者 大久保 賢治| 森川 浩| 紀本 岳志| 田中 祐志|
抄録 Thermal 'staircase', a layer of constant temperature between the sheets of the steep gradients, was formed in the seasonal thermocline, which was 2.5 m above the bottom at a point of 18 m deep on the boundary slope in Lake Biwa. Following a sediment resuspension event when a moderate onshore wind blew, bed materials should be suspended up to the thermocline, then settled down forming a staircase above the turbid intrusion. Comparing the observed downward hear flux with the settling flux of sediment, it was found that double-diffusive convection would play an important role on the formation of the whole structure consisting of the staircase and turbid intrusion along with chemical anomalies and dense population of phytoplankters, which were fed by nutrients supplied from the bottom sediment under a typical condition of drought. Laboratory experiments were conducted to demonstrate the thermal and sediment processes in the stratified lake. Resuspension process due to surface and internal waves was examined using a tank with a sloping bottom, while the settling process was investigated by using a deep, diffusive tank. Formative process and scales of the staircase and intrusion were discussed relating with the intensity of resuspension and the buoyancy fluxes.
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1996-03
1巻
1号
開始ページ 77
終了ページ 89
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313571
JaLCDOI 10.18926/fest/11568
フルテキストURL 003_097_104.pdf
著者 Hassan Muhammad Qumrul| 大久保 賢治|
抄録 Surface air temperature distribution over the Ganges Delta Region of southwest Bangladesh and its tendency of warming are discussed through the analyses based upon the long-term temperature data from 1900-93. The data consist of two parts corresponding to the time-periods: 1973-93 and 1900-72. The study area is one of most affected places by the annual monsoon hydrological cycle and the present observation from these temperature data indicate that the surface air temperature gradient in the north-south direction is significant in the rainy season and that the temperature of the region is at an increasing tendency; the warming rate during the data periods (1900-93) on the long-term mean annual basis is estimated as 0.77℃ at Satkhira of the Khulna division and 0.29℃ as an areal average including the Barisal division, for the time difference of about half a century between the data periods before and after 1972.
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1998-01-14
3巻
1号
開始ページ 97
終了ページ 104
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313675