3. If you had taken a field trip offshore to the monitoring station in 20 m off

Question

3. If you had taken a field trip offshore to the monitoring station in 20 m off Terrebonne Bay on April 17, 2016, would you have been likely to find low oxygen conditions on the bottom or not? Base your answer on the wind data below, and your knowledge of the mechanisms supporting the formation and maintenance of hypoxia. (2 points) WAVCIS CSI-6 Significant Wave Height (3/29/2016-4/26/2016) Significant Wave Height 18 1 6- 1.4 1.2 CSI-6 5.2 0.8 0.6 0.4- 0.2 0 3.3 a 2.6 2.0 1.3 0.7 - . Date and Hour

Explanation / Answer

As shown in the graph, the significant wave height 20m off Terrbone bay on April 17, 2016 was approximately 1m or 3.3 ft.

No, if we visit the monitoring station on this then we are not likely to find low oxygen condition on the bottom. This is because the significanct wave height on this day has higher value and the waveheight of 1m here indicates a windspeed of around 30km/hr. Wind speed influences the oxygen level by causing near shore vertical mixing and reaeration. The wind speed in this case is sufficient to bring th bottom waters out of hypoxia.

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