Write a short passage on the subject of meteorology.

"Cool XX (place name)" encountered sultry weather-

We should look at it scientifically

From August 1 to 4, we XX people felt the extreme heat, and did we feel that "Cool XX" was really cool? Are we selling melons?

in fact, everyone's feelings are right! The sultry weather these days really can't be called "cool"! Since August 1st, the highest temperature in urban areas and three counties (cities) has been above 32 degrees, and the air relative humidity is around 5% or above, which makes me feel hot and stuffy.

But on the other hand, it's unbearable to be hot for just four consecutive days, and we even doubt whether the term "cool XX" is appropriate, which proves that our XX is "cool" even more! Because we have always been accustomed to the "coolness" in summer, it is really unbearable to suddenly encounter a relatively short "sultry". As for whether XX is really cool, how should we treat it scientifically?

first of all, "cool XX" definitely does not rule out a few days of sultry weather in summer. The high temperature weather that appeared a few days ago ranked third in XX city since it had meteorological records in 1951. On the one hand, according to scientific data, those days were not the hottest. The hottest day was on the afternoon of August 12, 29, which was 35.5 degrees Celsius. The second hottest day was on July 27, 1997, which was 35.3 degrees Celsius. This time, it was on the afternoon of August 2, which was 34.8 degrees Celsius, ranking third. It is clear from the data. On the other hand, in terms of frequency, since 1951, the highest temperature above 34.8 degrees Celsius in our city has only been three days, that is, it has been encountered three times in 64 years, which is more than once in 21 years. From the meteorological point of view, we are still "cool", just saying that we have encountered high temperature weather once in 21 years this year, so consider it lucky!

speaking with data is the science behind the facts. Cool XX is generally speaking, with statistical data as evidence. Vertical comparison: climate scale and 3-degree weather days; Horizontal comparison: cities of the same scale, coastal areas, surrounding areas, etc.

how many times are there high temperatures similar to this year? And what about other areas? The longest duration of continuous sultry weather, what about other areas?

Is there a connection between global climate change and the extreme maximum temperature in our city?

cool XX's demand for caring for the environment.

how does the urban heat island effect affect the cooling degree?

high psychological expectation and high attention?

What is cool and cool about "Cool XX"? When it comes to the word "cool", we must first understand that this refers to the air! Therefore, on the one hand, this is a meteorological concept, on the other hand, "cool" is the relative feeling of the human body, and different people may feel different. "Cool" mainly means that the actual temperature gives people a "cool" experience, and "cool" means that the comprehensive meteorological elements of temperature and wind bring a sense of comfort and make people feel refreshed.

Is there any basis for what we XX people call "cool XX"? Does "Cool XX" have a specific expression of weather and climate? Can you compare it with some famous summer resorts? What is the reason for "the coolness of XX"? Can it be maintained in the future?

let's talk together.

First of all, the coolness of XX has a solid basis. Please remember the following key data:

Since the meteorological record was recorded in the urban area of XX in 1951, the urban area of XX has reached and exceeded 35 degrees Celsius for only two days in 62 years.

these two figures were 35.3 degrees and 35.5 degrees respectively, which appeared in the afternoon of July 27th, 1997 and August 12th, 29. In addition to these two days, there has never been a temperature of 35 degrees in downtown XX! Donggang city has never had a temperature of 35 degrees or above since it was recorded! Even if XX and XX are located on the land far away from the ocean, there have only been 9 and 3 temperatures of 35 degrees and above! Compared with some cities in North China and Northwest China at the same latitude, this is rare. Compared with Dalian, Yingkou, Jinzhou and Huludao in our province, as well as Qinhuangdao, Beidaihe and Chengde, it is even cooler than Yantai, Weihai and Qingdao in Shandong! (Note: According to meteorological standards, it is considered as hot weather when the temperature reaches 35 degrees Celsius or above)

In a year, the average number of days when the daily maximum temperature reaches 3 degrees or above in XX coastal areas is only 6 days.

Beidaihe in the coastal area has 7.6 days. Yingkou, Jinzhou, Huludao and other coastal cities in our province and Yantai, Qingdao and Weihai are far more than 6 days. Not to mention the coastal cities south of Shandong.

Secondly, XX's "Shuang" is more original and better. As I said before, "cool" refers to the air! So where is the air cool in XX? Because on the basis of "coolness", there are three natural "air conditioners" in XX in summer that turn around the clock!

There is the first large air conditioner at night: the mountain valley wind brought by the mountains. Everyone should understand that XX is located between Liaodong Peninsula and Korean Peninsula, with mountains in the north, east and west. From the perspective of large terrain distribution, the urban area of XX is surrounded by an inverted "V" shape. Because in summer, especially in mountainous areas, the temperature drops rapidly from night to morning, the air close to the ground (about 1 meters thick) will flow to the low-lying urban area and its surrounding plains under the action of pressure difference, which will bring people in this area a "cool" feeling. At the same time, because of the abundant precipitation in summer in our city, it is easy to form relatively clean and cool radiation fog in the mountains and woodlands at night. These fogs are rich in negative oxygen ions. This kind of air containing fog and negative oxygen ions flows to low-lying areas such as river valleys and plains, including of course the urban area of XX, giving people a cool, moist and refreshing feeling, that is, a "cool" feeling. This inverted "V" terrain in XX area does not exist in some cities equivalent to XX along the northern coast of the Yellow Sea and around the Bohai Sea. By the way, the inverted "V" terrain is also a unique and important factor that causes abundant rainfall in XX, resulting in fresh and humid air and high vegetation coverage.

during the day, there is a second big "air conditioner": the land-sea wind brought by the sea. Looking south from Donggang, there is a blue ocean. If your eyes are good enough, you can look all the way to the equator! The XX area is the northernmost part of Wan Li's coastal area in China, facing the longest sea area in the north and south to the south, which is the only case in China. In summer, the specific heat capacity of land is smaller than that of sea water, and the temperature rises much faster than that of sea water after being irradiated by sunlight, resulting in a temperature difference between sea and land. The air near the sea surface will flow from the sea surface to the land, forming a land-sea wind, and further penetrate inland to reach Fengcheng area as far as possible. The air temperature near the sea surface is low over the land, so the air from the sea surface will drive away the air over the land in our city, which will bring us "cold air" in summer and make us feel refreshed! Especially in the summer afternoon, this kind of land-sea breeze is more obvious, which makes the temperature that should have risen in the afternoon be "splashed" with "cold air"! At the same time, due to the evaporation of ocean water, gaseous water is entrained in the sea-land wind, and the relative humidity can reach about 6%. People feel that this wind has a moisturizing effect. You say "cool" but not "cool"!

There is a third small "air conditioner" for fine adjustment during the day: Yalu River. The Yalu River stretches for nearly 18 kilometers from the northeast corner of our city to the southwest, straight to the urban area of XX, then to the urban area of Donggang, and finally into the Yellow Sea. The Yalu River originates from the deep mountains and valleys of Changbai Mountain range, and all the places along the way are covered with mountains, valleys and streams, with dense forests, low water temperature and excellent water quality, which is unique to the northern region. This river, along with its banks and mountains, forms a natural air-conditioning system, which affects the mountain villages and towns on both sides. In the urban area, a wind system similar to the land-sea wind is formed between the water surface of Yalu River and urban buildings and streets-in summer daytime, the wind blows from the river to the urban area. At night, on the contrary, the wind blows from the city to the river. If it is a sunny day in summer and the temperature rises rapidly, the wind blowing from the river to the urban area in the afternoon will be bigger and more obvious, and people will move from the urban area to the river, and the air will become colder and wetter. A gust of river wind swept over my face, feeling the summer heat disappear and refreshing all over!

whether as foreign tourists or local residents, we want to thank these three natural air conditioners in XX, because they add "cool" after "cool" in XX! As of August 28, there has not been a high temperature above 35 degrees in XX, and the number of days above 3 degrees is only 6-7 days! Just as the national heat wave was rolling in the summer of 213, it can be seen that XX can still keep cool in the summer alone.

Third, the coolness of XX has its unique and rich weather and climate resource background, which has more potential and prospects.

Because the location of XX city is characterized by "a river surrounded by mountains on three sides; The peninsula faces the sea ",so it is rare to say that" air conditioning can be done in one day and high temperature can be achieved in 62 years "in the hot summer. In fact, there are more abundant weather and climate resources as a strong support for its stability.

firstly, there is abundant rainfall and abundant fresh water resources in XX. The average annual rainfall reaches 8-12mm. Ensure that our XX is "cool" and "moisturizing" at the same time. Drought and dry weather rarely visit XX, so the flowers and trees in XX are lush and clean. Rain plays the role of "cleaner" and washes the streets, buildings and the earth at any time, so that we can keep clean on XX day and give people an "eye-catching" green and refreshing mood every day. Let's taste the tap water from Yalu River again: this is not tap water, this is the original mountain spring water. When you use it, your hair won't stick to your head, and the boiled water will have no scale. Can be drunk directly, sweet and refreshing!

Secondly, there is less windy weather in XX, which is incomparable with other coastal cities in China. In the past two decades, the average number of days with gale of magnitude 6 or above has only been 2.75. Dalian, our close neighbor, has an average of 9-14 days of strong winds of magnitude 6 and above every year (not to belittle, only for comparison). Because there are few windy days, especially the persistent gale is rare, we don't have to worry about the hair style being blown by the wind. We don't need a scarf to cover the face to resist the floating dust. We can have an open-air stadium to play a hearty badminton without worrying about the wind blowing the ball away. Our polished leather shoes can last for 3-5 days lazily, and even our car has reduced the frequency of washing our faces. Aren't we "cool" in our bodies? !

thirdly, it is the humidity of XX. The average relative humidity in XX is between 6 and 7. This is a relatively suitable humidity range for human body. Even in dry winter, the average relative humidity of XX is above 5% most of the time. Therefore, our XX has a natural moisturizing factor, so ladies can boldly save the cost of purchasing cosmetics, and nature has helped solve it! With moisturizing factor, our XX mountains, waters and people are more beautiful! Looking around, how many trees with dead tips and yellow leaves can you find? You can't even see a woman with rough skin!

fourthly, it is the day of XX. Blue sky and white clouds, green trees and red flowers are the eternal beauty in our hearts, and there are more such beautiful scenery XX! On average, there are 77 days in XX area every year under the background of blue sky and white clouds with less than 5% low cloud coverage. Because the northern part of XX area is the residual vein of Changbai Mountain, it is easy to produce light cumulus clouds in the case of uneven heating in mountainous areas and north wind, and the silvery white clouds float from north to south, similar to sheep on the grassland. If you happen to be on the bank of Yalu River at this time, you will see white clouds, blue sky, water and sky on the calm river as if you were entering a fairyland. At this time, you are on the top of Phoenix Mountain, and you can only see "the sky is shining and the shadows are wandering"!

all these things, to name a few. Just as a netizen said: there is no heating in the south of the Yangtze River, it is impossible to live in winter, and northerners can't stand the biting wet and cold. It is extremely hot in summer, so we can only rely on air conditioning to relieve the heat. Sichuan is also rainy and muggy in summer. In the northern part of the pass, the temperature in winter can be adapted, but it is relatively dry. Spring and summer are the saddest. Take Beijing as an example. It is windy and dusty in spring and extremely hot in summer. In the end, I found that the climate in the northeast coastal area is pleasant. The winter in XX along the Yangtze River is not very cold, and the summer is more refreshing. The climate is really unique.

The abundant weather and climate resources behind "Cool XX" make XX's "Cool" have rich connotations.

fourthly, the coolness of XX has brought us eyes and a beautiful state of mind.

Because "cool" XX has rich climate, it brings us beautiful and unique natural scenery. From the meteorological point of view, the scenery of XX is closely related to meteorological factors.

The average annual low cloud (the height of the cloud bottom is less than 15m from the ground) in XX is 257 days, which is already a lot, and the average annual foggy days reach 5 days, which is incomparable among inland cities, and only Qingdao and XX can be compared. No matter our mountain climbers in XX or the residents living in high-rise buildings with more than 2 floors, we can see the castle in the air and the misty fairy island (Maokui Mountain, Wudaogou Mountain and Jinjiang Mountain are exposed from the foggy sea) set off by the foggy sea on the riverside. As for standing on the top of any mountain in our city, we can see the magnificent scene of the sunrise in the sea of clouds. These are all made by low clouds and are wonderful works of nature. We can also see the similar scene of "Fog Lock River". When we arrive at Taiping Bay or Hekou Scenic Area or Shuifeng Lake area, we can also see the grand view of "Silver Fog Waterfall" on a certain morning (that is, the fog flowing on the river floats over the dam). As for the period from March to July in our city, due to the sea fog landing, there will be a dreamy artistic conception of "deep rain": the drizzle (known as Mao Mao rain in meteorology) accompanied by a weak south wind falls, which makes us think a lot. If we accidentally break the bridge, we can meet the artistic conception of "misty rain", and history and reality will mix and emerge in the drizzle.

in winter, when drizzle or dense fog meets cold objects, it turns into scenes like "silver hanging on branches" and "silver wrapped in plain clothes", and the Yalu River and tree branches are full of rime (tree hanging). When the breeze blows, "silver needles fall" (like countless silver dazzling needles falling from the air);

As for the natural scenery evolved from low clouds, XX is the richest. There are countless by-products created by light and clouds, such as "rosy clouds all over the sky", "sunset red like fire" and "rainbow crossing the Yajiang River"!

What is cool and cool about "Cool XX"? After all my nagging, you must know something!