The higher the latitude, the whiter the race? Does skin color have anything to do with latitude?

The Norsemen at high latitudes are Caucasian, but the Indians at lower latitudes are also Caucasian. The entire continent is black, including South Africa, which is not at a low latitude. But skin color matters.

The same Caucasians. Indians look much darker than Norsemen. It's just tanned by the sun.

The closer people are to the equator, the darker their skin generally is, because the equator is hot all year round and is exposed to direct sunlight.

The white race is the most populous race in the world, accounting for about 54 of the world's total population. Their physical characteristics are: their skin color is mostly light and pale color; The hair is golden yellow, some are black-brown; eye color bluish or taupe; wavy or straight hair; The lip shape is thin; The nose is narrow and high; The cheekbones are not high.

The skin color of the human race is roughly as follows: the higher the latitude, the more skin color (darker and lighter). The colder the place, the whiter the race. Because there is less ultraviolet light at lower latitudes. In addition, the colder the place, the larger the body and the higher the nose. Because the cold slows down the metabolism in the body, the growth cycle is longer

Of course, it has to do with the sunshine, and the intensity of the sunshine is related to the latitude, and the population near the equator is generally very dark.

The color of human skin is closely related to the natural environment, the higher the latitude, the weaker the solar radiation, the lighter the skin color, and the lower the latitude, the opposite.

Of course, about pulling.

It has something to do with sunshine.

The intensity of sunlight is related to latitude.

So...

Yes, the colder the place, the whiter the race. Because of the low latitude of the place ultraviolet rays.

Few. In addition, the colder the place, the larger the body and the higher the nose. Because the cold will slow down the metabolism in the body, the growth cycle will be longer, and the body size will be larger and more adaptable to the environment and surface area.

The ratio to volume will be smaller, which can reduce heat dissipation. This is true not only for people, but for all animals.

Generally speaking, in fact, it is mainly related to the local heat, and the higher the latitude area, the body of the organisms is larger than that of the organisms in the lower latitudes, mainly to resist the cold, such as Borneo, the Amazon or the Sahara Desert in the lower latitudes, in which the size of the organisms is still relatively small, what you say is related to the amount of precipitation is for individual regions, but the whole earth is still related to latitude in general.

It is not absolute, it can only be said that on the whole, people's height is higher at high latitudes than at low latitudes, pastoral areas are higher than agricultural areas, and urban areas are higher than rural areas. The high latitude area is cold all year round, the human metabolism is slow, the growth period is long, and more material and energy are accumulated, so the body is tall. The tall body unit material corresponds to a small surface area and dissipates less heat, which is conducive to resisting wind and cold.

The short stature of people at lower latitudes is the opposite of the above-mentioned reasons. On the other hand, the difference in height between northerners and southerners is also greatly related to the number of hours of sunshine. For example, Beijing has an annual sunshine of few hours and a normal height development; The annual sunshine hours in Wuhan are hours, followed by height development; The annual sunshine hours in Guangzhou are hours, followed by height development; Chengdu has the least annual sunshine hours, only hours, so height development is more secondary.

The average height of men in Sichuan Province ranks second to last in the country, and the third lowest in women, which is directly related to the fact that Sichuan Province has only one hour of sunshine per year. But this is not absolute: the vertical zonality of human geography refers to the regular change of human phenomena on the surface with the increase of altitude.

For example, in terms of human height, areas with higher altitudes in China are generally lower than those with lower altitudes. Survey data show that in Tianjin, Shanghai, Nanjing and other cities with an altitude of less than 10 meters, the average height of men is 171-173 cm, and the average height of women is 159-161 cm, while the average height of Xining, Lanzhou, Guiyang and other cities above 1000 meters above sea level is 167-170 cm for men and 155-159 cm for women. Another reason:

The main reason for the difference in height between the north and the south is that the climate in the north is cold at high latitudes, the crop growth cycle is long, and the calcium nutrients in the soil are absorbed, so the northerners get more calcium through food than the southerners, and the absorption and utilization rate is improved. On the contrary, people in tropical areas, because of the warm climate, fast growth of crops, low absorption of nutrients in the soil, and fast metabolism of the human body, calcium nutrients in the body for a short retention time, low absorption and utilization rate, calcium nutrients in the body storage less, so shorter.

This statement is inaccurate, and it should refer to the summer months.

Because the higher the latitude, the shorter the length of the latitude, and when the sun shines directly on the northern hemisphere, the morning and dusk lines are tilted, the morning line in the northern hemisphere is inclined to the west, and the dusk line is inclined to the east, and the daytime range in the northern hemisphere generally becomes larger.

The dividing line between the day and night hemispheres of the earth is called the morning and dusk line (circle). The morning and dusk lines divide the parallel lines they pass through into day and night arcs. Due to the existence of the yellow and equatorial angles, each parallel coil is divided into two parts of the day arc and the night arc of unequal length (except for the equator) except for the equinox, when the morning and dusk lines pass through the poles and divide all the parallels equally.

The earth rotates in one revolution, and if the day arc experienced is long, the day is long; The night arc is long, the day is short.

In ethnogeography, the skin color of a person is generally inversely proportional to latitude, that is, the lower the latitude, the darker the skin tone. This is evidenced by the fact that the black race originated and was mainly distributed in the lower latitudes, the yellow race originated and was mainly distributed in the middle latitudes, and the white race originated and was mainly distributed in the higher latitudes. Human height is also closely related to latitude, which is roughly proportional to latitude, that is, it increases with the increase of latitude, such as the South China and Southwest people in the low latitudes of China are medium to short, the body of people in Central China and East China in the middle latitudes is medium, and the figures of the Northeasterners, Northwest and North China people in the higher latitudes are medium to high; As for the shape of the human face, the thickness of the lips, the height of the nose, the sweat glands, the hair and other physiological phenomena are all related to latitude. In agricultural geography, the varieties and yields of crops:

There are obvious latitudinal differences in cropping systems and multiple cropping indexes. In terms of tourism geography, the zonal characteristics of Chinese's humanities tourism resources are distinct. In terms of cultural geography, the character characteristics of our people, language, clothing, food, gardens, dwellings, literature, drama, calligraphy, painting and other cultural events are different from the north and the south, and there is an obvious contrast in regional styles.

This phenomenon of regional differentiation exists even in a small region, for example, in the same Shaanxi folk song, there are obvious different styles in the northern, central and southern regions: the folk songs of northern Shaanxi are rough and bold, the folk songs of southern Shaanxi are euphemistic and smooth, and the folk songs of central Shaanxi are fresh and elegant. In terms of world economic geography, there are certain zonal differences in the level of social and economic development between the northern and southern parts of Europe, the northern, central and southern parts of Africa, and the northern and southern regions of China and the United States.

In terms of world political geography, the contradiction between the North and the South and South-South cooperation are also related to the zonal law of latitude.

It is related to the change in latitude and the climate is changing in the lower latitudes where the temperature is high. Organisms need to increase their relative body surface area in the process of evolution.

In this way, the stature is relatively short (relative body surface area is the relative value of body surface area and body weight, because the metabolic amount is directly proportional to body weight, and heat dissipation is based on body surface area, although the body is also large, but the weight gain is more. The square relationship between area and length is squared, and the relationship between volume and length is squared) In the same way, the temperature is low at high latitudes, so they are tall and burly. (This is also the reason why the Siberian tiger is larger than the South China tiger).

The short stature of Eskimos at such high latitudes is estimated to be caused by the extremely low temperature that inhibits metabolism as well as its genetic factors. (However, the relative area theory is still suitable.) Just look at the figure of the Eskimos)

To be precise, it has to do with the climate, which in turn changes with the geographical location

According to the latitude, the five natural zones of the earth can be divided, the equator is near the tropics, the Tropic of Cancer is the temperate zone to the north and south latitude of about 60 degrees, and then to the north and south, it is the cold zone, and the natural conditions of water and heat can be obtained according to the latitude.

One is the local gravity at high latitudes.

If you are small, you will easily grow taller.

Second, the climate of high latitude is relatively cold, and the body surface area corresponding to the unit weight is small, so it is easy to conserve heat. Like the Siberian tiger.

They are bigger than Bengal tigers, and the average height of northerners in our country is taller than that of southerners.

hiahia~

Because people at high latitudes are subject to less gravitational pull, and people close to the equator are subjected to greater gravitational pull, they do not grow tall and are always sucked downwards ......