At approximately 30°–35° N and 30°–35° S, the subtropical zones called the horse latitudes are belts of high evaporation that produce major deserts and grasslands on the continents and cause the surface salinity to rise.
Which of the following is true regarding ocean salinity at 30 degrees north and south of the equator?
Which of the following is true regarding ocean salinity at 30 degrees North and South of the Equator? Dry masses promote ocean water evaporation and high salinity .
Why are the oceans less salty at the equator than at 30 degrees north and south?
Near the equator, the tropics receive the most rain on a consistent basis. As a result, the fresh water falling into the ocean helps decrease the salinity of the surface water in that region.
Why is salinity in the open ocean higher between 20 to 30 degrees north and south latitude than at the equator?
The salinity of surface seawater is controlled primarily by the balance between evaporation and precipitation. As a result the highest salinities are found in the so-called sub-tropical central gyre regions centered at about 20° to 30° North and South, where evaporation is extensive but rainfall is minimal.
Why is there more salinity in the southern hemisphere?
Horizontal Distribution of Salinity of Ocean Water
This is attributed to the high occurrence of precipitation on equator. ... The average salinity of the Northern and Southern hemisphere is 3.5 and 3.4 % 0 respectively. This also because of the fact that the Northern Hemisphere is land dominated.
Why is the salinity of the surface waters of the equatorial and subtropical regions about 30 latitude in the Atlantic Ocean different?
Why is the salinity of the surface waters of the equatorial and subtropical regions (about 30 degrees latitude) in the Atlantic Ocean different? More precipitation in equatorial region and more evaporation in subtropical regions . ... The salinity of ocean water remains constant (does not change) below the halocline.
Why is salinity different from ocean and ocean?
Evaporation of ocean water and formation of sea ice both increase the salinity of the ocean. However these “salinity raising” factors are continually counterbalanced by processes that decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.
Where is salinity the lowest in the ocean?
Seawater can also be less saline near land, where rivers add freshwater. The ocean around Antarctica has a low salinity of just below 34ppt, and around the Arctic it is down to 30ppt in places.
Which ocean has salinity more than 37?
the Atlantic have the highest salinity, higher than 37 parts per thousand in some areas. This is because, on average, there is more evaporation than combined rainfall and river runoff into the Atlantic Ocean, maintaining.
How does salinity vary in the Pacific ocean from the South Pole to the equator to the North Pole?
The salinity patterns of the surface waters of the Pacific are influenced largely by wind and by precipitation and evaporation patterns . The waters within the belt of calm and variable winds near the Equator have lower salinities than those in the trade-wind belts.
Why is surface salinity higher at lower latitudes?
The surface salinities higher than the deepwater salinities in the lower latitudes because in these subtropical regions there is extensive evaporation ...
What is ocean salinity discuss the affecting factors ocean salinity distribution in the world?
Oceanic salinity is affected by factors such as temperature, ingress of fresh water and mixing of currents . Oceanic salinity plays important role in the growth of marine organisms, circulation of oceanic currents and distribution of temperature and rainfall across the globe.
Is salinity higher than open seas?
Oceans have higher salinity than open seas.
Which hemisphere has more salinity?
Explanation: The northern hemisphere occupies more land mass. This is one prime reason for increased salinity in the northern hemisphere. Land heats up and cools down faster than ocean water.
Which hemisphere has more salinity Upsc?
Due to the influx of melted water from the Arctic region, the salinity decreases from 35 o/oo – 31 o/oo on the western parts of the northern hemisphere. The North Sea records higher salinity due to more saline water brought by the North Atlantic Drift despite its location in higher latitudes.
What is salinity of sea water?
The concentration of salt in seawater (its salinity) is about 35 parts per thousand ; in other words, about 3.5% of the weight of seawater comes from the dissolved salts.
Why is the salinity of the surface waters of the equatorial and subtropical regions about 30 degrees latitude in the Atlantic Ocean are different quizlet?
Why is the salinity of the surface waters of the equatorial and subtropical regions (about 30 degrees latitude) in the Atlantic ocean different? Precipitation in the equatorial water would lower the salinity, while evaporation in the subtropical region would increase the salinity.
Why do ocean temperatures and salinities vary?
The difference in density of cold water versus density of warmer water is responsible for ocean currents and upwelling. Warm seawater floats and cold (4° C), dense (1 g/cm3), seawater sinks, so ocean temperatures also vary across the surface and into the depths.
Why is surface water salinity higher in the tropical oceans than in the northern oceans?
Terms in this set (4)
Why is Surface water salinity higher in the tropical oceans than in the northern oceans? ... the surface of the tropical oceans would be cooler and the water less dense .
What is the cause of the difference in surface water salinity between equatorial and subtropical regions?
In the tropical regions, the temp is high, so the evaporation rates are high enough to increase salinity. Along the equator, there is a lot of rain, which causes runoffs , which causes a decrease in salinity because of the added water.
Does salinity increase with temperature?
With increasing temperature, salinity decreases ....and conversely, with decreasing temperature, salinity increases.
Does temperature or salinity have the greatest influence on the density of seawater?
Temperature has a greater effect on the density of water than salinity does . So a layer of water with higher salinity can actual float on top of water with lower salinity if the layer with higher salinity is quite a bit warmer than the lower salinity layer.
Where is salinity the lowest in the ocean quizlet?
Places with lowest salinities are near 60 degrees latitude (low pressure) and along coastlines . Rivers weather down rocks and carry the minerals to the ocean. The rivers evaporate, leaving behind salt.
Which of the following consists the lowest salinity?
The Baltic Sea’s salinity is much lower than that of open ocean water, as a result of abundant freshwater runoff from the surrounding land, combined with the shallowness of the sea itself.
Where in the oceans is seawater salinity highest quizlet?
- A measure of the amount of dissolved salt in water.
- Salinity is NOT Homogeneous across Earth’s oceans.
- The factors that influence salinity: freshwater input, evaporation and precipitation.
- Salinity controls DENSITY.
- Salinity is highest in mid-latitudes and lowest at the equator.
Which region has salinity more than 37 O OO?
the Atlantic have the highest salinity, higher than 37 parts per thousand in some areas. This is because, on average, there is more evaporation than combined rainfall and river runoff into the Atlantic Ocean, maintaining.
How much salinity is in the Pacific Ocean?
c) The Pacific Ocean is about 34.62 parts per mil on average . Answer 3: You mean the ocean’s salinity? A quick Google search came up with the salinity of the ocean being about 35 parts per thousand, or about 3.5%.
Which of the following processes decrease seawater salinity?
The density of seawater is affected by salinity and temperature. Processes that decrease seawater salinity include evaporation and sea ice formation .
What determines the salinity of the ocean?
The concentration of salt in seawater (salinity) varies with temperature, evaporation, and precipitation . Salinity is generally low at the equator and at the poles, and high at mid-latitudes. The average salinity is about 35 parts per thousand.
Which of the Sea is known for the highest salinity?
The correct answer is option 3, i.e. Dead Sea . The Dead Sea is a Lake. It is also called the Salt Sea. The Dead Sea is the world’s saltiest water body with 33.7% salinity.
Which of the following consists the highest salinity?
The correct answer is Atlantic Ocean . In the Atlantic Ocean high salinity is not recorded at the Equator rather it is observed between 50-20 Degree latitudes. The average salinity of the Atlantic Ocean is 35.6 Percent.
How temperature affects the salinity of seawater?
Increases in temperatures of surrounding entities like ice and an increase in precipitation adds fresh water into the sea, which lower salinity. Seawater with lower salinity is lighter in density and won’t sink as much as denser water. This process changes ocean currents.
Are all oceans the same salinity?
Do all of the oceans have the same amount of salt? Each ocean has a different salt content and each ocean is not uniformly salty – rather different areas and seas have higher or lower salt levels. On average, saltwater contains 35 grams of salt per kilogram, according to Scripps Institution of Oceanography.
What is the salinity of Indian Ocean?
Overall, the salinity of Indian Ocean surface waters varies between 32 and 37 parts per thousand , with large local differences.
Why is salinity higher near 30 latitude?
At approximately 30°–35° N and 30°–35° S, the subtropical zones called the horse latitudes are belts of high evaporation that produce major deserts and grasslands on the continents and cause the surface salinity to rise.
Why does ocean salinity vary spatially?
The SSS spatial pattern reflects the climate belts associated with general atmospheric circulation . ... If it rains more than evaporated (E-P<0), for example in area of strong atmospheric convection (e.g., equatorial) or at moderate latitudes, the salinity diminishes at the ocean surface.
Does salinity increase or decrease with depth at high latitudes?
Sub-Surface Salinity
In high latitudes, salinity increases with depth . In the middle latitudes, it increases up to 35 metres and then it decreases. At the equator, surface salinity is lower.
What does ocean salinity affect?
Salinity can affect the density of ocean water : Water that has higher salinity is denser and heavier and will sink underneath less saline, warmer water. This can affect the movement of ocean currents. It can also affect marine life, which may need to regulate its intake of saltwater.
What are the two factors that control the salinity of seawater?
What are two factors that control the salinity of seawater quizlet? Evaporation and temperature are the two main factors that control the concentration of salts in seawater.
What is salinity also mention the average salinity of ocean?
Salinity of Ocean. The salinity of ocean water is usually around 35 parts per thousand on an average at zero degrees Celsius. This implies that in the total weight of ocean water, dissolved salts amount to 3.5 percent. Sodium chloride or the common salt is the most common among all the dissolved salts in the sea.
Which ocean has salinity more than 37?
the Atlantic have the highest salinity, higher than 37 parts per thousand in some areas. This is because, on average, there is more evaporation than combined rainfall and river runoff into the Atlantic Ocean, maintaining.
Why is there more salinity in the southern hemisphere?
Horizontal Distribution of Salinity of Ocean Water
This is attributed to the high occurrence of precipitation on equator. ... The average salinity of the Northern and Southern hemisphere is 3.5 and 3.4 % 0 respectively. This also because of the fact that the Northern Hemisphere is land dominated.
