The document discusses thermoclines, haloclines, and pycnoclines in seawater, which are layers in the ocean where temperature, salinity, and density rapidly change with depth. A thermocline is a layer where temperature quickly drops with increasing depth, while a halocline and pycnocline refer to layers where salinity and density increase rapidly with depth as pressure increases underwater. These three factors are interrelated and influence each other as depth from the ocean surface increases.

1. 7. Pressure & Density in
Seawater

2. Thermocline
Rapid change
in
temperature
as you go
deeper in the
ocean

3. Can you tell where the thermocline
is?

4. Pycnocline
Rapid
change
in
density
as you
go
deeper
in the
ocean

6. Halocline
Rapid
change in
salinity as
you go
deeper in
the ocean

7. How are Thermoclines, Haloclines,
& Pycnoclines related?
1) As you go deeper, temperature in the ocean:
– increases (gets warmer) OR decreases (gets
colder)?
2) As you go deeper, density and salinity in the ocean:
– increase (gets saltier) OR decrease (gets less
salty)?
3) As you go deeper, density and salinity in the ocean:
- increases (there is more pressure OR decreases
(there is less pressure)