Oceanography, environmental assignment help

timer Asked: Apr 17th, 2017
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Question Description

Hi can you please answer each of these questions in 50 words or more?

What are four natural processes of decreasing seawater salinity, and two natural processes of increasing seawater salinity? Describe the processes - remember that I am looking for evidence that you understand the material, so be sure to add details that support your statements.

Name and discuss two main types of marine pollution. Which type do you consider the most harmful? Why do you think so? Be sure to include details that show how well you understand the material, and use facts from your reading (the textbook or other sources) to support your ideas. Don't forget to tell us what sources you used for your information.

Why is ice less dense than water? (What do you suppose would happen to fish if this weren't true?)

Why is polar water saltier than ocean water? How does that affect ocean currents?

Where is water the saltiest? Why is it so salty?

What is the average deep ocean temperature? What are the coldest temperatures? Where do the coldest temperatures occur?

What is the ocean pressure at its deepest point? Where does that pressure occur?

Tutor Answer

School: University of Maryland

Hello, kindly confirm my work, all questions are well detailed as per your instructions.For clearly understanding, I decided to answer each question separately as per your instructions.

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Among the four main natural processes which decrease seawater salinity include: runoff

from land, precipitation, sea ice melting and icebergs melting. These four processes reduce
seawater salinity through adding more water in the sea to reduce level of salt concentration.
Reducing salt concentration is an implication of low salinity in seas (David and Saucède).
Among the two main processes increasing seawater salinity involve evaporation and
formation of sea ice. Both processes involve reducing amount of fresh water in the seas which in
turn results to high levels of salt concentration (David and Saucède).
The main processes of marine pollution involve oil spills from ships and sewage disposal.
In most cases, ships encounter oil leakages as they transport commodities across oceans. These
oils serve as impurities hence polluting ocean water. Impacts associated with oil pollution in seas
incorporate death of aquatic life (David and Saucède). Sewage disposals involve animal waste and
human wastewater which is often washed all the way into ocean. Untreated sewage comprise of
pathogens and microbes which affect aquatic life in the oceans.
Oil spills is the main form of ocean pollution. This is because, offshore drills lead to
leakages in to the oceans. Ships transporting oils products end up leaking large percentage of oils

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in oceans. Additionally, people also contribute to oil pollution in oceans through pouring
cooking oils and grease which is later drained into oceans (David and Saucède).
When water freezes, its molecules result to formation of crystalline structure retained by
hydrogen bonding. This crystalline structure is termed as ice which floats on liquid water. By
floating on water, this implies tha...

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