The open ocean: Practice Questions

The open ocean plays a vital role in global climate control. Which property of water is primarily responsible for the ocean's ability to act as a temperature buffer?

The open ocean acts as a significant carbon sink. Which of the following best describes the 'biological pump' mechanism in the epipelagic zone?

Which of the following correctly identifies the vertical depth zones of the open ocean in order of increasing light penetration?

In the open ocean, the benthic zone is often nutrient-rich compared to the epipelagic zone. What is the primary reason why this nutrient wealth does not result in high primary productivity in the deep ocean?

Differentiate between the epipelagic and mesopelagic zones of the open ocean in terms of light penetration and its resulting impact on primary production.

Discuss how the open ocean provides temperature buffering for the Earth's atmosphere, referring specifically to the role of the high specific heat capacity of water.

Explain the mechanism by which the open ocean acts as a significant carbon sink and how the global ocean conveyor belt facilitates the long-term storage of carbon.

(a) Explain the formation of upwelling and its importance in maintaining primary productivity in certain regions of the open ocean.
(b) Discuss the effects of the El Niño-Southern Oscillation (ENSO) cycle on the productivity of the Peruvian anchoveta fishery.
(c) Describe how temperature and salinity gradients interact to form a pycnocline in the water column.

(a) Identify the zones of the open ocean based on light penetration: the epipelagic, mesopelagic, and bathypelagic zones.
(b) Explain the role of the ocean as a global carbon sink and how this interaction with the atmosphere helps in climate control.
(c) Describe how the global ocean conveyor belt ensures the mixing of nutrients and dissolved gases throughout the deep ocean.