湖の成層破壊過程における水温変動の時空間特性

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タイトル別名
  • TEMPORAL AND SPATIAL VARIATION OF WATER TEMPERATURE IN PROCESS OF DESTRATIFICATION IN LAKES
  • ミズウミ ノ セイソウ ハカイ カテイ ニ オケル スイオン ヘンドウ ノ ジ

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Temporal and spatial variation of water temperature was measured in a lake by using three different probes. A P-probe has seven sensors for depth, temperature, light attenuation due to sediment concentration, solar radiation and so on. Temperature fluctuations were compared between the moving and fixed P-probes.Period of these fluctuations ranges from several seconds to some tens of seconds and seems to be higher components of internal wave of the maximum buoyancy frequency. T-probe as a vertical array of thermistors, also showed a patchy structure consisting of eddies of a few centimeter likely due to the cellular motion, which was verified in the other shallow lake during the previous measurements. Discussing the stability parameters, the current field in the vertical during the measurements was proved to be on the critical stability condition.

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