Yoing Ocean Data Acquisition Profiler

The YODA profiler (“Yoing” Ocean Data Acquisition Profiler) is a “tow-yo” instrument to profile the water column with high spatial resolution from small boats without occupying much space. The instrument is provided with a deployment winch and sensors measuring conductivity, temperature, pressure, chlorophyll, turbidity and dissolved oxygen. The brush at the top of the instrument allows for a stabilizing effect on the free-fall sinking speed, which is approximately constant at 0.2 m/s. All data are stored internally and downloaded into a PC through a wet-connector and interface.

Relative paper

1. Masunaga E. & Yamazaki, H. (2014) A new tow-yo instrument to observe high-resolution coastal phenomena. Journal of Marine Systems, 129, 425 – 436. DOI: 10.1016/j.jmarsys.2013.09.005
2. Masunaga E., Homma H., Yamazaki H., Fringer O. B., Nagai T., Kitade Y., Okayasu A., (2015) Mixing and sediment resuspension associated with internal bores in a shallow bay. Continental Shelf Research, 110, 1, 85 – 99. DOI: 10.1016/j.csr.2015.09.022
3. Masunaga E., Fringer, O.B., Yamazaki, H., (2016) An observational and numerical study of river plume dynamics in Otsuchi Bay, Japan. Journal of Oceanography, 72, 3 –21. DOI: 10.1007/s10872-015-0324-2
4. Kim N. H., Hwang J. H., Hyeon K. D., (2018) Evaluation of Mixing and Stratification in an Estuary of Korea, Journal of Coastal Research, 85, 96 – 100. DOI: 10.2112/SI85-020.1
5. Kim N. H., Pham V. S., Hwang J. H., Won N. I., Ha H. K., Im J., Kim Y., (2018) Effects of seasonal variations on sediment-plume streaks from dredging operations, Marine Pollution Bulletin, 129, 1, 26 – 34. DOI: 10.1016/j.marpolbul.2018.02.014

Parameter	Range	Accuracy	Response Time
Temperature	-3~45℃	±0.01℃	0.2s
Dissolved Oxygen	Air saturation:0~200%	±2% FS	0.4s(2)
Depth	0~600m(1)	±0.3% FS	0.2s
Conductivity	0.5~75 mS cm-1	±0.01 mS cm-1	0.2s
Salinity	2~42	-	0.2s
Turbidity	0~1000 FTU	±2% MV or ±0.3 FTU	0.2s
Chlorophyll	0~400 ppb	±1% FS	0.2s

⁽¹⁾ Standard depth range. 1000m depth version is available upon request.
⁽²⁾ 63% response time (at 25℃ in air)