Microscale structures of phytoplankton and turbulence
| Project/Area Number |
16310005
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
YAMAZAKI Hidekatsu Tokyo University of Marine Science and Technology, Faculty of Marine Science, Professor, 海洋科学部, 教授 (80260537)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Yuji Tokyo University of Marine Science and Technology, Faculty of Marine Science, Associate Professor, 海洋科学部, 助教授 (90207150)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2004: ¥9,200,000 (Direct Cost: ¥9,200,000)
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| Keywords | turbulence / microstructure / mixing / phytoplankton / fluorescence / 蛍光光度計 |
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| Research Abstract |
Turbulence plays a major role in small scale distribution of phytoplankton, but no quantification has been established. In order to investigate this issue we have developed two different magnifications of fluorescent probes. One is based on LED technology and the other one makes use of laser technology. A new experimental calibration method is developed to estimate the resolution of each probe. This method compares the spatial response of fast temperature probe (FP07) and derives an appropriate wavenumber response function. So the signals from the probe can be corrected in wavenumber space. The LED probe resolves at least 2 cm, and the laser resolves at least 2 mm. We have successfully demonstrated fluorescence data exhibit near inertial subrange slope, -5/3, when velocity spectrum also show the -5/3 slope in the same wavenumber range. We have also demonstrated both probes are consistent when the signals are averaged larger than 50 cm spatial scale. We are now confident that phytoplankton changes the distribution as small as a few millimeters.
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Report
(4 results)
Research Products
(45 results)
