Why is the distribution of seawater salinity asymmetrical in high latitudes in the northern and sout

Why is the distribution of salinity asymmetrical in the high latitudes of the northern and southern hemispheres? In fact, there are many factors that affect the distribution of seawater salinity, and to analyze the reasons, first of all, temperature and precipitation are the main factors affecting seawater. From low to high latitudes, the salinity of sea water depends mainly on the relationship between evaporation and precipitation.

High temperature, low precipitation, and high salinity of seawater, such as subtropical sea areas; The temperature is low, the precipitation is high, and the salinity of the sea water is low, such as the sub-low area; The temperature is high, but there is a lot of precipitation, and the salinity is not too high, such as in the equatorial region. For example, the Baltic Sea has become the lowest salinity in the world due to the low evaporation of the sea area with river inflow. Moreover, the seasonal variation of river flow affects the seasonal variation of sea salinity.

In addition, in the sea area at the same latitude, the salinity of the sea water increases when warm sea water passes by, and the salinity of sea water decreases when cold sea water passes.

Hello, the reason for the low salinity of sea water at 60 degrees north latitude: The thermal properties of sea and land in the northern hemisphere are significantly different, with more frontal rain, and the westerly wind is lifted by the land, and Xiangshi has more precipitation. Warming and humidification of the North Atlantic and North Pacific currents in the Northern Hemisphere The waters of the Northern Hemisphere are large and have a large amount of land freshwater injection. The waters of the Southern Hemisphere are small and scattered, and there is no land freshwater injection.

The density of sea water is lowest near the equator, and the density of sea water near the poles is also relatively low. The subtropical ocean, on the other hand, has the highest density due to its high evaporation and salinity.

The main elements are temperature and precipitation, precipitation and evaporation.

If you take the test, you go directly:

Because the Northern Hemisphere is landmass, there is a large amount of surface runoff that flows northward into the high-latitude sea areas, while the Southern Hemisphere does not, the Antarctic continent.

There is no surface runoff and it is very dry (the salinity is regulated almost exclusively by the melting and solidification of the ice floe).Therefore, the difference in surface runoff creates the difference in salinity between the northern and southern hemispheres at high latitudes.

If the discussion continues, it will be necessary to also talk about the North Atlantic Current.

and southerly westerly drifting in the southern hemisphere, and analyze why he brought the high salinity of the sea water at the middle and low latitudes did not increase the overall salinity at the high latitudes. So you should try to stop at the bold word.

Summary. Hello dear, the low temperature, low salinity and high density of sea water in the polar regions are the result of a combination of factors. First of all, the sea temperature in the polar regions is lower, much lower than in other regions, which makes the sea water denser.

Secondly, there is a large amount of ice and snow melting in the polar regions, and this fresh water will reduce the salinity of the seawater, which will also increase the density of the seawater. Finally, the sea water in the polar regions is subjected to a lot of wind and snow, which will reduce the inorganic salt content in the sea water and also increase the density of the sea water. In short, the low temperature, low salinity and high density of sea water in the polar regions are the result of a combination of factors.

Why is the sea water in the polar regions low in temperature, low salinity, and high in density? Doesn't it mean that the lower the salinity of the seawater, the less dense it is.

Hello dear, the low temperature, low salinity and high density of sea water in the polar regions are the result of a combination of factors. First of all, the sea temperature in the polar regions is much lower than in other regions, which will increase the density of sea water. Secondly, there is a large amount of ice and snow melting in the polar regions, and this fresh water will reduce the salinity of the seawater, which will also increase the density of the seawater.

Finally, the sea water in the polar circle is affected by the wind and snow of the Great Dan bright light, which will reduce the inorganic salt content in the seawater and increase the density of the seawater. In short, the low temperature, low salinity and high density of sea water in the polar regions are the result of a combination of factors.

Doesn't it mean that the lower the salinity, the less dense it is?

No. In general, the lower the salinity of seawater, the less dense it is, but there are exceptions. The sea temperature in the polar regions is lower, much lower than in other regions, which increases the density of the sea.

Secondly, there is a large amount of ice and snow melting in the polar regions, and these fresh waters will reduce the salinity of the seawater, and the stuffiness will also increase the density of the seawater. Finally, the sea water in the polar regions is subjected to a lot of wind and snow, which will reduce the inorganic salt content in the sea water and also increase the density of the sea water. In short, the low temperature, low salinity and high density of seawater in the polar cavity bucket area are the result of the combined action of many factors.

The distribution of surface seawater salinity decreases from the subtropical sea area in the northern and southern hemispheres to the high and low latitudes on both sides. This is because the subtropical sea is controlled by the subtropical high pressure zone, with less precipitation, more sunny weather, strong evaporation, and high salinity. The sea area near the equator is controlled by the equatorial low pressure zone, with abundant precipitation and low salinity.

The temperate zone has high latitude, low temperature, weak evaporation, and low salinity.

A scale of the salinity content of seawater. The salinity of seawater is an important characteristic of seawater, and it is the basic parameter for studying the physical and chemical processes of seawater, along with temperature and pressure. Many phenomena and processes in the ocean are often related to the distribution and change of salinity, so the study of the distribution and change law of salinity in the ocean occupies an important position in marine science.

The surface of the world's oceans is affected by evaporation, precipitation, freezing, ice melt and land runoff, and the salinity is unevenly distributed: near the poles, in the equatorial region and in the sea area affected by land runoff, the salinity is relatively small; In the sea area at 20 degrees north and south latitude, the salinity of the sea is relatively large. The salinity of deep seawater varies little and is mainly controlled by physical processes such as circulation and turbulent mixing.

Based on the characteristics of the salinity distribution in the ocean, it is possible to identify water masses and understand their movements. The influence of salinity should be taken into account when studying the interaction and equilibrium relationship between ions in seawater, exploring the law of element migration in seawater, and determining certain components dissolved in seawater. In addition, because it is often difficult to accurately determine the density of seawater directly and accurately in practice, salinity, temperature, and pressure are often measured in various countries, and the density is calculated according to the equation of state of seawater.

Sea water temperature: the highest in the equatorial region decreases to the south and north poles; Presents a unimodal curve.

The salinity of seawater decreases to high and low latitudes in the subtropical region at the highest level, showing a bimodal curve.

The precipitation near the equator is greater than the evaporation, and the Congo River and the Amazon River are injected into the A and B seas, respectively. A sea area is affected by cold currents, B sea area is affected by warm currents (3) The surface of the Strait of Gibraltar is the Atlantic sea with low salinity flowing into the Mediterranean Sea with high salinity, so that the closer to the Atlantic Ocean, the lower the salinity 【Analysis】(1) The latitudinal distribution of Atlantic surface salinity is also consistent with the distribution law of global ocean surface salinity, that is, it decreases from the subtropical sea area of the northern and southern hemispheres to high latitudes and low latitudes. (2) There are many factors that affect the size of salinity, but it is necessary to distinguish the main factors and secondary factors. (3) The change of salinity in the Mediterranean Sea is affected by the Atlantic surface current.

<> look at the distribution map of the climate zone, the Tropic of Cancer is controlled by the sub-high pressure, the climate is dry and rainless, except for the humid climate in South China due to the influence of the monsoon, the rest of the land is basically a tropical desert climate.

The temperature is high, the evaporation is high, the rainfall is low, the land rivers are also less recharged, and the salinity is definitely high.