April 5th lecture

Question 1

Where can gases freely move between the ocean and the atmosphere?

Answer 1

The sea surface.

Question 2

What is the direction of exchange governed by? ( two things )

Answer 2

1- Saturation Solubility

2- Concentration of gas in seawater

Question 3

What is saturation Solubility?

Answer 3

The maximum amount of gas that can be dissolved in water at a given temperature, salinity and pressure.

Question 4

What will transfer between ocean and atmosphere look like if the sewater is under saturated?

Answer 4

Transfer is from the atmosphere to the ocean.

Question 5

What will transfer look like between the ocean and the atmosphere if the seawater is oversaturated.

Answer 5

Transfer in from the ocean to the atmosphere

Question 6

What causes Solubility to increase?

Answer 6

• Decreasing
  temperature
• Decreasing salinity
• Increasing pressure

Question 7

True/False:

Cold, brackish water cannot dissolve more gas than warm salty water at the same pressure?

Answer 7

False:
cold,
brackish water can
dissolve more gas than
can warm salty water
at the same pressure

Question 8

In the ocean how do proportions of dissolved gases primary change?

Answer 8

Through biochemical processes in the Photic zone and in the deep ocean.

Question 9

What biochemical occurrences happen in the photic zone that alter the proportions of dissolved gases in the ocean?

Answer 9

In the photic zone (the region of the ocean penetrated by light), Carbon Dioxide (CO2) is consumed and Oxygen (O2) produced by photosynthesis

Question 10

What biochemical occurrences happen in the deep ocean that alter the proportions of dissolved gases in the ocean?

Answer 10

oxygen is used by respiration and
decomposition, with these processes producing excess
CO2
as a by product

Question 11

What does low CO2 levels near the surface of the ocean implie?

Answer 11

It implies that the ocean can continue to take ore Co2 from the atmosphere

Question 12

How come low CO2 levels in the upper ocean leaves leads to issues in the ocean?

Answer 12

The deep ocean creates an abundance of CO2 and if the surface gets it from the atmosphere than the subsurface CO2 gets trapped

Question 13

Why is it significance that the tropics have low concentration of O2?

Answer 13

leaving those regions vulnerable to

processes that consume oxygen

Question 14

With increased levels of CO2 in the ocean, what is one of the major byproducts?

Answer 14

Carbonate ions

Question 15

What affect do Carbonate ions have on the ocean?

Answer 15

The consumption of Carbonate ions impeads calcification