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Change Over Time of Yearly Mean Data

Q&A Focus Questions (access the answers to these questions here by clicking on the plus icon next to each question). Each of the major questions listed below has subquestions sorted by grade level (see further below).

1.	Is salinity the same everywhere in the oceans?
2.	Are there "salt deserts" in the oceans?
3.	What are the main sources of fresh water to the oceans?
4.	Are there salty and fresh seasons?
5.	Were the oceans as salty a hundred years ago?
6.	How does salinity affect the deep ocean?

9-12: Water Cycle
Determine if global precipitation, evaporation, and the cycling of water are changing.


Applicable Videos:

9-12: Climate
Describe how changes in the ocean's circulation can produce large changes in climate.


"Q&A" Extension: How might these long-term changes in salinity reflect long-term changes in ocean circulation and climate?

Applicable Videos: