Please geography master, who can I geography questions

First of all, it is not caused by La Niña or El Niño. They mainly affect the circumferential region of the eastern Pacific Ocean.

The degree of disaster is mainly determined by the following factors: 1. Topography 2, precipitation 3, water conservancy facilities 4, and local economic level.

The western part of Hunan is mountainous, and the eastern part is a plain, when the summer monsoon "moves west to the north", a large amount of water vapor will be brought into clouds and rain on the east side of the mountain, and the eastern area is a windward slope with a lot of precipitation. In addition, Hunan's river network may be denser than Jiangxi's, and water conservancy facilities are not good enough to flood. If Hunan's economy is better than Jiangxi's, then the property losses will be greater than Jiangxi's.

When it comes to winter damage, Hunan is farther away from the ocean than Jiangxi, and the sea temperature is higher in winter, which is why the coastal areas are warmer than the inland in winter. Hunan is inland, and due to the difference in the thermal properties of land and sea, Hunan is colder. Then Hunan is more affected by the northwest monsoon and is susceptible to cold waves or heavy snowfall.

Fujian is near the sea, the water vapor brought by the Pacific Ocean in the east is relatively warm in winter, and at the same time, there is a north-south Wuyi Mountain in the west to block part of the warm airflow, so the temperature in Hunan is lower, in fact, in comparison, Hunan spans a larger latitude.

At the same time, China's winter monsoon is first northwest wind, and then slightly changes to northeast wind near 30 degrees north latitude, so there is a winter monsoon directly invading Hunan, while Fujian is less affected. Therefore, it will snow in Hunan at the same latitude and Fujian will not snow.

The landlord was right.

There are two reasons for this year's snowfall.

The first reason is that we are in a La Niña state this year, that is, the sea surface temperature in the eastern equatorial Pacific is lower than normal and below the negative degree, and the impact of this phenomenon on China's climate is very obvious. It's going to have a cold winter, so we can see that this cold winter is coming this year.

The second reason is that the two conditions that must be met for snow or rain are 1Warm and humid air currents from the tropics. 2.

There is cold air from the alpine regions. Areas of winter snowfall (the same is true for areas of summer rainfall) are located near fronts, i.e. at the junction of warm and cold air masses. This position is not fixed, it is determined by the strength of the forces of the two natures.

The cold air mass is weak, and the front and precipitation area are higher latitudes, and the cold air mass is stronger, and the front and precipitation areas are lower latitudes. The land cold high that affects China in winter is the Asian high (also known as the Mongolian and Siberian high pressure) centered in Mongolia and Siberia, and its sphere of influence is very large, which has a great impact on the weather in China, especially in the northern region. The cold air that affected our country in the early part of midwinter this year is relatively weak, and the number of times is not much, even with the cooperation of warm and humid airflow, it is not easy to snow without cold air.

However, since 2008, the Asian high pressure is very active, and the cold air mass continues to form southward to affect our country, resulting in a wide range of windy cooling weather, but because the warm air mass in the south this year is also very active, a large number of warm and humid air currents from the Pacific Ocean and the Indian Ocean frequently visit the southern region, when the strong cold air mass from Siberia, Mongolia quickly moves south to the southern region, and meets with the warm and humid air mass, the cold, warm two just combined. Affected by the combination of these two airflows, there has been a lot of rain and snow in recent times, especially in the Yangtze River basin, and the weather has been maintained at low temperatures for a long time. If there is only a strong cold air mass, and there is no large amount of water vapor provided by the warm and humid air mass, there will only be strong winds and cooling weather in the south; If there is only a large amount of water vapor provided by the warm and humid air mass, and no cold air mass is present, there is no catastrophic weather at all.

And when both are in place, disaster strikes.

Anti-El Niño.

In fact, it's almost the same, maybe Hunan's propaganda is more in place.

I figured out that many so-called meteorologists will only assemble various excuses after a disaster and turn them into their own theories.

It's so powerful, why didn't it come out earlier? I just know how to put it in hindsight.

In fact, this snow disaster cannot be solved with geographical common sense, because this is a small probability event under abnormal climatic conditions.

I want to know too. Following. Hehe.

1.Wide-belted things Bidong Hong Kong ants imitate Macao.

2.Yunnan forest Asian elephant.

3.Loess, Taihang Mountain, Folly, Wusheling Mountains, Qinling Mountains, Great Wall.

On the day of the summer solstice (around June 22), the sun shines directly on the Tropic of Cancer (23°27 north latitude), and in July, the sun must shine directly on the place south of the Tropic of Capricorn, but Beijing is located at more than 40 degrees north latitude, so choose C

c, the days in Beijing in July are long, the sun rises in the northeast and sets in the northwest, and the sun's trajectory is from northeast to northwest.

c Beijing is in the north of the Tropic of Cancer, the direct point of the sun should be in the south, the sun is rising in the east and setting in the west, at 8 o'clock Beijing time, the sun is in the southeast of Tiananmen Square.

It's always the Southeast.

Pick C is around you.

Don't think it's asking about the sunrise.

Note that it is 8 o'clock even.

c is simple, first exclude d d and b.

For the case of A, for Beijing at 8 o'clock, I don't know if it is dawn in winter? It is related to the point of direct sunlight, and there are special circumstances.

c is yes, it has something to do with the latitude of Beijing.

Because the difference between point D and point A is 4, and point C and the point where the desired temperature is on the leeward slope (i.e., the air is drier), the temperature difference is greater than the temperature difference between point D and point A. (Other details omitted).

Is this from high school? How come I haven't studied?

The schematic diagram lacks point D, and I see that the title ignores the defects.

Didn't see spot D!

However, the meaning of the topic has been made very clear: the vertical decline rate of moist air and dry air is different, and the vertical decline rate of moist air is smaller! If these factors are not taken into account, the temperature will generally be the same at the same altitude!

Therefore, the temperature at the same height as point A should be 30! But the title gives us the condition that hot and dry air prevails on the leeward slope (the windward slope has a lot of terrain and rain, so after the wind passes through the windward slope, the air becomes dry and hot, because the air loses moisture)! When moist air rises, water vapor condenses, and water condensation is the process of releasing heat, which counteracts some of the cooling caused by the rise!

Based on this condition, we can conclude that the temperature on the windward side will be higher than on the leeward side of the same side!!

This way we can clearly choose the answer from the options! (Only C is lower than 30!!

Where's D?

This is the key to solving the problem.

Definitely a

You just want to drop faster, at the leeward slope at the same height as point A, it will fall faster, so the temperature will be high. Because it is known in the question: dry air changes a lot in the vertical direction.

1. The key to this question is to determine the coordinates of the O point.

The only point that satisfies the condition of "intersection of any two warp coils" is the pole, so a is the pole.

According to the tangent point of b is the great arc of the earth and the 52°s latitude coil, the latitude of point b is 52°s, and the figure shows the great circle of the earth, and the pole in this hemisphere is close to 52°s, so point a should be the south pole.

Point O is the center of a great circle, and the O should be in the same meridian coil, so the latitude of Point O is 90-52 = 38°s

When the east and west dates of point b are different, the old and new date ranges are equal around the world" This sentence gives two pieces of information:

There are different times and the same times when the dates on the east and west sides of point b are the same, and it is deduced that the meridian where point b is located is not a 180° line. (The vast majority of the dates on both sides of the 180° line are different, and the old and new date ranges are all different around the world) then it is certain that the 0 time line.

The 0 time line is on the same meridian as the 180° line of the International Date Line. Divide the Earth into two hemispheres, with equal ranges of old and new dates around the globe.

From this, it is inferred that o is on the 180° longitude and b is on the 0° longitude.

So, the coordinates of point o are (180°, 38°s) and belong to the South Pacific Ocean.

The hemisphere centered on point O has a small land area and a large ocean area. Problem solving.

2. A can be concluded to be an island country in Oceania according to the coordinates of point O, and if you are familiar with the map, you can further determine that it is New Zealand.

Located at the junction of the Indian and Pacific tectonic plates, it is the boundary of extinction, not growth. What is not correct is A.

Answer: Lin Xi's husband, a classmate, was wound in, and the latitude of point O was not correct. But the idea of solving the problem is completely correct. I'll go through it again along his lines of thought and point out the trap he fell into.

First of all: from "a is the focus of the two meridians", a is the pole. （1）

Secondly, from "b is the tangent between the great arc of the sphere and 52°s", the latitude of point b is 52°s. （2）

Then: from (1) and (2), a and b latitude differences of less than 90° to get a as the south pole. （3）

Then: from "o is the center of the circle" and (2) and (3), it is obtained that o is 38°s, note that the latitude difference between 52° is 90°, and the latitude difference between AB is 90°-52°=38°, so the latitude difference between the two points of OA is 90°-38°=52°, so the latitude of point O is equal to the latitude of point A-52°=38°s. （4）

Then: from "when the dates on both sides of point b are different, the global date range of the old and new two days is equal":

If the two-day date range of the world is equal, that is, the international date line and the meridian at 0 o'clock divide the earth equally, so the meridian at 0 o'clock is the other side of the date line, that is, the 0° meridian, and the 0° meridian is 0 o'clock in local time.

For this to be true, point b must be on the 0 time meridian. (Note that if b is on the 180° meridian, the whole world is on the same date, which is not in line with the title.) O and b are on the same warp coil with a longitude of 180°.

So the coordinates of point b are (0°, 52°s) and the coordinates of point o are (180°, 38°s).

Therefore, in question 1, the coordinates of point o are (180°, 38°s), and most of the great circle centered on o is in the southern hemisphere, and the ocean area is vast, so item b is correct. Items a, c, and d describe the Northern Hemisphere. Therefore, this question is selected B.

Question 2, point o coordinates are (180°, 38°s), located in the Pacific island country of New Zealand. New Zealand is an economically developed country; It belongs to the temperate oceanic climate, suitable for the growth of succulent pastures, and the dairy industry and large pasture grazing industry are developed; New Zealand is located at the junction of the Indian Ocean Plate and the Pacific Plate, which is the extinction boundary. Therefore, the statements b, c, and d are correct, and the statements of a are incorrect.

So choose A for this question.

Finally saw a somewhat interesting question I know that there are few guest officers of this level :) Do you want to give some rewards or something? Ha ha.

First of all: from "a is the focus of the two meridians" - a is the pole (1).

Secondly: from "b is the tangent between the great arc of the sphere and s52 degrees", it is concluded that point b is 52 degrees south latitude (2).

Then: from (1) and (2) --a is the south pole (3).

Then: from "o is the center of the circle" and (2) and (3) --0 is 38 degrees south latitude (4) [90-(90-52)].

Then: from "when the dates on both sides of point b are different, the global date range of the old and new two days is equal":

First of all, if the global dates are different, the dates on both sides of the date line must be different.

Secondly, if the two-day date range of the world is equal, that is, the date line and the meridian at 0 point divide the earth equally, so the meridian at 0 point is the other side of the date line, that is, the 0 degree longitude.

Third, for the condition to be true, point b must be at the 0 degree meridian.

So: from "when the dates on both sides of point b are different, the global date range of the old and new days is equal" - point b is at 0 degrees of longitude, so b is at s52, and the point (5) is 0

And since a is the south pole, o is on the 180 degree longitude, so o is at s38,180 points (6).

Then, once the meaning of all the conditions given is clear, the problem can be solved:

The hemisphere with point O as the center of the circle is the hemisphere with the point S38,180 as the center, that is, with the South Pacific Ocean as the center, of course, it belongs to the sea hemisphere: so the first question is selected b (Rich forests, large populations, and large continents all belong to the continental hemisphere; So if you play a trick, you can choose it directly)

The second question asks the wrong one, and the two AB items are just opposite, and it is impossible to be correct at the same time, so the answer must be between AB, then, point o is near the junction of the Pacific plate and the Indian Ocean plate, if you remember the figure, you will know that it belongs to the convergence boundary, that is, the extinction boundary, so choose A

So far, 1, b; 2, a, it's OK

There are about 5 knowledge points and 6 solution points in this question, which belongs to the difficult type from the topic, but because the answer is set with skills to follow, it is not difficult to do, from the question it already belongs to the category of 10% to do it right, but from the option of the answer, I think it can be up to 40%, if you don't know this kind of question, don't delve into it, grasping the foundation is the key!

I have marked the above steps, and if you don't understand which step, ask me again

Okay, I'll admit that I made a little mistake, but plagiarism is shameful, and looking upstairs is self-respecting