Cold water, big tides

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After a very cold night, there was a layer of ice on Pedder Bay again this morning which allowed for some interesting observations and data collection by marine scientists.

ice-fragments

Data below were collected by second year Marine Science students at two different times of the morning.

8:05 am 11:00 am
Depth (m) Temp (oC) Salinity (ppt) Temp (oC) Salinity (ppt)
0 3.7 28.4 4.6 25.9
0.5 5.8 29.3 5.8 30.1
1.0 6.4 30.3 6.7 30.6
2.0 6.7 30.6 6.7 30.7
3.0 6.7 30.7 6.8 30.8
4.0 6.8 30.7 6.9 30.8
5.0 6.8 30.7 6.9 30.8

One major conclusion can be drawn:

The water is COLD (right down to 5 m where we usually measure temperatures around 10oC). It is so cold that students’ tongues are turning blue:

31413566224_daa3da4af1_k

Wait a minute… the cold is not the reason for the blue tongues in these Biology students!

We are also experiencing big tides these days (2.8 m tidal range). High tides in the early afternoon:

Then low tides at night:

low-tide

Emilio, Heather & Millie at low tide (20:15 11 Jan 2017)

Interesting times!

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