A high school geography question, ask a high school geography question

This is the Seto Inland Sea, which is located in the northern part of Shikoku Island and the southern part of Honshu Island, Japan is a mountainous country with a monsoon climate, and is affected by the southeast monsoon from the Pacific Ocean in summer. In winter, the northwest monsoon brings water vapor through the Sea of Japan, but in the southern part of Honshu Island, it is also a leeward slope of the winter monsoon (northwest monsoon) due to the resistance of the mountains of Honshu Island, so it is a leeward slope in winter and summer.

You're talking about the coast of the Seto Inland Sea. It is a leeward slope in winter and summer. In winter, the southern land of Honshu Island (the Chugoku Mountains) blocks the winter winds, and the coast of the Seto Inland Sea is on the leeward slope; In summer, the island of Shikoku blocks the southeast wind in summer, and the coast of the Seto Inland Sea is on a leeward slope.

It's really a little hard to see, but if it were me, I could speculate on the erosion of the mountains by the wind and rivers, and the slope of the windward side of the erosion should be more aggressive, and the area of the flat and gentle slope should be smaller than the leeward side.

In the Seto Inland Sea, Honshu Island blocks the north wind in winter and Shikoku Island blocks the south wind in summer.

The area has a monsoon climate, with northwest winds blowing in winter and southeast winds in summer, and the black circle is located in the Seto Inland Sea, with low mountains and hills on the north and south sides, blocking the depth of winter and summer winds.

The premise is: if the shadow is facing due north, then the sun should be in his south at this time, and what time of day is it?

The definition of 12 o'clock local time is the time when the sun shines directly on the meridian where it is located.

The shadow should appear facing due north, and the sun should shine due south, both of which should be due north and south, that is, on the same meridian.

So on which warp line?

Obviously it is on the meridian at 12 o'clock local time, you can look at the direct sun map, when the local time is not on the meridian at 12 o'clock, the shadow will be a little east or west, and only on the meridian at 12 o'clock local time, will there be due north.

Therefore, if the shadow is facing due north, it means that it is 12 o'clock local time.

Do you understand?

First of all, 12 o'clock local time is the midpoint of the day. Don't say that 12 o'clock local time does not refer to 12 o'clock Beijing time, 12 o'clock local time refers to the local area, and the sun is in the middle of the day.

It is best to have a shadow facing due north to indicate that the sun is in the sky due south.

12 o'clock local time is the midpoint of the day.

2. A shadow facing due north indicates that the sun is in the sky due south.

In the Northern Hemisphere, with the earth as the coordinates, the sun rises in the east and sets in the west, the trajectory of the day is exactly a semicircle, the local time is the local time, if the length of the day is 10 hours, then the time of sunrise in the morning is 12 noon and pushed forward by 5 hours, and the time of sunset is 12 noon and pushed back by 5 hours, that is to say, 12 noon in local time is the equal division of the day. The shadow faces due north, which means that the sun is at the midpoint of this semicircle, so the shadow faces due north, which is 12 o'clock local time.

I don't think so, not in the southern hemisphere.

In the figure, the diurnal temperature difference is large, the reason is: the weather is sunny under the control of high pressure, and the temperature difference between day and night is large.

In the diagram, near the two lines of m and n, the front that may appear is (n), and this front is a (cold) front.

It is the center of low pressure, and n is a low pressure trough. A front is formed on the trough of low pressure, and the western part of the cyclone is affected by the pressure gradient force and geostrophic deflection force, and the cold air actively moves to the warm air, forming a cold front.

It is one ,,, thought that the center is low pressure, and the surrounding area is high pressure, forming air flow. The temperature will change.

The second is high pressure and stability.

2 It should be because it is high pressure High pressure is northerly The further north the northern hemisphere goes, the greater the diurnal temperature range.

The answer is 2 reasons: 2 In the center of high pressure, the air flow is sinking, and the weather is sunny and the temperature difference between day and night is large. 1 In the center of low pressure, it is mainly rainy weather. The temperature difference between day and night is small.

First of all, we must have a deep understanding of two key concepts: starting from the South Pole, the South Pole is a very special position on the earth's surface, it is one of the two points on the earth that has no direction (the other point is the North Pole), standing on the South Pole, the three directions of east, west and south are completely meaningless, and there is only one direction in the north; At the South Pole, the sun only rises and sets once a year, the sun never sets for half a year, it is all daytime, the sun revolves around the South Pole in a place not high from the horizon, and it never sets, also known as "polar day", there is no sun for half a year, it is all night, also known as "polar night".

Then learn what an ice sheet is: Ice sheets are not tied to geographical features, such as not necessarily at the top of a mountain, but their dome is generally centered on the highest point of a hill. The ice will move from its highest point towards the edges. This phenomenon is called ice divide.

Next, to answer your questions: the South Pole is covered with ice and snow all year round, with a thickness of 2,000 meters and an altitude of 3,800 meters; The climate is extremely harsh, with an average annual temperature of minus 49 degrees, an average temperature of minus 32 degrees in summer, an average temperature of minus 78 degrees in winter, a minimum temperature of minus 89 degrees, and an average annual precipitation of 3 mm. The South Pole is not the highest point of the Antarctic ice sheet, and the snow and ice covering the South Pole move at a rate of about 10 meters per year, so scientists have to re-mark the latest position of the South Pole once a year to set a benchmark.

Is it okay to explain it that way?

It is the highest point of the ice sheet, that is to say, it is ice, and the stability of the ice sheet is much worse than that of the continent, for example, in summer, it may become lower with the melting of some ice and snow, and it may increase in winter, especially this year, the global temperature has risen, and the ice sheet of Antarctica has been greatly affected

A is wrong.

South Pole: There are 3 poles at the southern tip of the earth, one of which is the geographical south pole at 90°, which is the intersection of the earth's axis of rotation and the earth's surface. The second is the south magnetic latitude of 90°, which is called the geomagnetic south pole.

The angle between the poles is 11°33' and the distance is about 1280 km. The third is the South Magnetic Pole located in the area of 140°E longitude and 65°S latitude, which moves at an annual speed of about 5-6 kilometers and becomes a magnetic pole drift. The distance between the geomagnetic south pole and the magnetic south pole is about 1350 km.

b。The highest point of the Antarctic continent is Vincennes Peak.

cd。The Antarctic wind is strong, it blows, it blows, the snow and ice move, the accumulation site will naturally move, and the height will naturally change.

The highest point of the Antarctic ice sheet is located at about 80°s, 77°E, while the latitude of the South Pole is 90°s, so a is false;

The highest point of the ice sheet is not the highest point of Antarctica, the highest point of the Antarctic continent is Mount Vincennes, with an altitude of 5140m, so b is wrong;

The highest point of the ice sheet is not set in stone and will move. For example, if only half a meter of snow falls at the current highest point, and it is very thick in another place, it may exceed the current highest point and become the current highest point. In addition, the ice sheet itself is not immobile.

So the C answer is correct;

As I have just analyzed, since it will move, the altitude will naturally change, such as the amount of precipitation, global warming, the movement of glaciers, and so on. So d answer is correct.