Sand and dust storms (sand-dust storm) is a general term for sandstorms (sand storm) and dust storms (dust storm), which is a sign of desertification. It refers to the strong winds from the ground to roll up a large number of sand and dust, so that the horizontal visibility is less than 1 kilometer, with a sudden and short duration characteristics of the probability of small hazardous catastrophic weather phenomena. Sandstorms are storms in which a large number of sand particles are blown into the near-earth layer of the formation of sand storms; dust storms are storms in which a large number of dust and other fine particles are rolled into the high altitude by the wind.
Dust storms are weather phenomena in which strong winds blow dust and sand from the ground so that the air is very turbid and the horizontal visibility is less than 1km. Dust storm is a weather phenomenon in the wind erosion desertification, its formation by natural factors and human activities factors **** the same impact. Natural factors include high winds, reduced precipitation and its sand source. Anthropogenic factors refer to the destruction of vegetation in the process of human economic development, resulting in an increase in the frequency of outbreaks back to the dust storm.
Dust storms occur mainly in the winter and spring seasons, which is due to the winter and spring semi-arid and arid areas with little precipitation, the surface is extremely dry and loose, the resistance to wind erosion is very weak, when there is a strong wind blowing, there will be a large number of sand and dust is involved in the air, the formation of dust storms. Answer
2. Words and phrases describing dust stormsWith the improvement of the quality of life, people pay more attention to the natural environment.
In particular, dust storms at the turn of the century have attracted much attention. This is not only because of the high frequency of dust storms, the intensity, and the impact of a wide range of areas, in addition to Northwest, North China, but also spread to the southwest of Heilongjiang and Huanghuai and other places.
Especially in 2001, several sandstorms swept through Beijing, the intensity of the surprising, within five days had led to more than 1,200 flights were delayed, and even people missing in the sandstorm. Thus, people exclaimed, "Beijing spring can only dance with sand and dust ****!" Experts initially guessed that China may have entered a new round of sand and dust frequent period.
Check the information since 300 AD, found that the north of China has had five large sand and dust frequent period, each lasting about 90 to 100 years. The two most recent occurred in AD 1610-1700 and 1820-1891, two cycles are also nearly a century apart, and now from the last cycle and just over a century.
Meteorologists believe that a new cycle of frequent sand and dust may be approaching. It can be seen that since ancient times, dust storms are a common natural disaster in the north of China.
And according to ancient fossilized ivory research, as early as hundreds of thousands of years ago, the Nanjing area has the magic shadow of sandstorms! Sensei check the scientific and technical literature, China's ancient poetry there are a lot of descriptions and records about sandstorms. In the spring of one year, the late Tang poet Li Yi crossed the Shannxi desert and encountered a sandstorm, and he wrote a poem called "Duo Duane Sha": "I see that the wind comes to the sand spinning to move, and the years do not save the time of the grass.
It is not said that there is no spring in the northern part of the country, but there is always spring.
The poet used the language of poetry to record a sandstorm that he personally experienced.
The first line "see the wind to sand spinning move", high house to see the high level, imposing, only a "spinning" word, enough to see the wind and sand to the fierce. It is because of this shocking experience, the poet will have "not save the years when the grass is born" association, in this vast moraine is afraid to never see the grass grow it.
However, the poet's broad-minded, optimistic nature, the next two lines, the poem for a change: please do not say that the northern part of the mountain can not see the flowers, there will always be spring information. Song Xuanhe four years (1122 years) in early autumn, Song Huizong House Professor, the Imperial College Doctor Chen and Yi from Luoyang through the Zhongmou into the capital Kaifeng lectures, the autumn breeze, it is not pleasant.
Unexpectedly encountered a sandstorm, very chagrined, wrote "Zhongmou Road" two stanzas, one of the clouds: willow beckons not to wait for the matchmaker, dragonfly near the horse suddenly guessed. How to get with the cool wind about, not *** sand and dust together.
The poet rode to the appointment, all the way to the autumn wind gusts, willow; dragonflies flying around in the air, just flew close to the side of the horse, want to fall on the horse's back to rest rest, but fear of the horse's big tail, and then quickly flew away from the picture of a vibrant early fall. The only thing that I can say is that there was a dust storm, and I couldn't open my eyes, so it was a real bummer.
If you can with nature "appointment", called the sand and dust do not come with the cool wind a piece, it would be very good. Let's go back to the ancient times and see what it was like.
As far back as the Jin Dynasty, Lu Ji used his poetry to leave us precious historical information about the sand and dust that was causing harm. In his poem "Poem for Gu Yanxian on Giving a Woman", he wrote: "Beijing and Luoyang are full of wind and dust, and the plain clothes are turned into black."
The Jin Dynasty used Luoyang as its capital, and here "Jingluo" means Luoyang. These two lines of the poem say that Luoyang is a place with a lot of sand and dust, and it is very terrible, when the sand and dust come, all the white clothes are dyed into black.
This is both an exaggeration of the language of the poem and a true depiction of the side ravaged by sandstorms. Song Dynasty science Shen Kuo "Mengxi Bianan" book, recounting his visit to Yan'an found the "oil", said the substance "quite similar to the paint, burned like hemp, but the smoke is very thick, the stained tent are black.
He specially assigned "Yanzhou Poetry" a: Erlang Mountain under the snow, spinning Zhuo dome to learn Serbian. The winter is not old, the stone smoke is like the dust of Luoyang.
The people burn oil, thick black smoke, white clothes dyed black clothes, disgusting, with what metaphor is not good, the poet preferred to use Lu Ji's lines to "Luoyang dust" metaphor "stone smoke". It can be seen that the sandstorm has a profound impact on people's lives.
Sand and dust storms are abominable, but not terrible, the key is to pay attention to the country, to take the effect of sand prevention and sand control national policy. The central government has put forward the "scientific concept of development", the implementation of the western region of China's planned "fallow" policy, issued a "re-creation of Jinxiu mountains and rivers" call.
Yu heart happy, pleased to write a poem: Western Frontier development potential amazing, hundreds of millions of conscripts do not saddle. The new policy of fallow fields, the line to see the verdant coloring of the mountains and rivers.
3. Describe the windy rainy sentences
1, the wind chased the rain, rain chased the wind, wind and rain united to chase the dark clouds in the sky, the whole world is in the rain.
2, the sky just now is still wind and clouds, in a flash of thunder and lightning, stormy, even sitting at home, but also feel that the earth shaking the momentum of the mountains.
3, outside the wind, blowing the branches of the trees swinging, the dust on the ground flying, so people can not open their eyes,
4, the rain is even bigger, the roof, the street, splashed with a layer of white rain fog, like a misty white veil. At this time, a gust of wind blowing over, the white veil curls away, the rain hit the street on the water, stirred up a splash.
5, the sky is low, dark clouds, dark clouds, the wind roars; a moment of heaven, thunder, lightning; a moment of pouring rain, pouring rain; a moment of rain, rain breaks, rainbow bridge flying north and south.
6, the rainstorm came! With the wind blowing, the rain curtain from the mountains behind the diffuse over, in a moment the world into a white blanket.
7, The wind roared and slammed the door open against the wall. The chimney made a low whimpering sound, as if it were drawing in the darkness of the night.
8, The rain pounded the roof and struck the glass in a thrilling strain.
9, just now or cloudy, instant thunderstorms, lightning and thunder, the trees were blown by the wind, swaying, shaking, deafening thunder as in the ear.
10, the wind whistling blowing, the rain falling. Close up, the street is not even a shadow of a person, white flowers all the water, simply become a flowing river.
11, the sky of the rain like a sieve beans straight down, breaking the mirror of the lake, scared away originally wanted to jump on the water to see the rain of small fish.
12, the rain fell more and more big, soon like the pouring of the same, look at the rain in the air is really like a big waterfall! A gust of wind blew, this dense as a waterfall of rain was blown by the wind like smoke, fog, dust.
13, bean-sized raindrops fell on the ground, splashing water, the water as a small fountain. When the water splash fell on the ground, it turned into a small blister, and the small blister looked like a small transparent hat.
14. The rain fell from the sky like crazy, and the sky was dark and heavy like it was going to collapse.
15, the rain is bigger, the roof, the street, splashed with a layer of white rain mist, like a misty white veil. At this time, a gust of wind blowing over, the white veil curls away, the rain hit the street on the water, stirring up a splash.
16. The wind rolled with the rainstorm like countless whips, and fiercely to the glass windows.
4. 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grass, wind and electricity, wind and thunder, wind and rain, wind blowing, wind blowing the grass, wind blowing the sun and sunshine, wind blowing the rain and beating the wind and frosting the sword, wind and rain, wind and rain, wind and rain, wind and hair and springs, 风风雨雨, 风寒暑湿, 风號雨泣, 风和日丽, 风和日美, 风和日暖, 风回電激, 风激电骇, 风急浪高, 风娇日暖, 风角鸟占, 风静浪平, 风举云飞, 风卷残雪, 风卷残云, 风谲云诡, 风狂雨横横, 风里杨花,风流博浪, 风靡云涌,风平浪静, 风起潮涌, 风起浪涌,风起雲涌,风起雲蒸, 风桅阵马, 风轻日暖, 风轻云淡, 风清月白, 风清月皎, 风清月朗, 风清月明, 风丝不透, 风飧露宿, 风恬浪静, 风恬月朗, 风微浪稳, 风行草从, 风行草偃, 风行雨散, 风旋电掣, 风雪交加, 风檐寸晷, 风檐刻烛, 风雨剥蚀,风雨不测,风雨晦冥, 风雨暗暝,风雨交加,风雨漂摇, 风雨漂晃, 风雨飘零, 风雨凄凄凄, Wind and rain like obscurity, wind and rain like a rock, wind and rain, wind and rain, wind and cloud changes, wind and wind, wind and wind, wind and rain, wind and candles, wind and grass dew, rocking up, rocking ten thousand miles, rocking up, light wind and clear moon, kuei jiao shanran, chilly wind and bone piercing, good wind and good rain, gentle wind and fine rain, cranes and wind, horizontal system of the decadent waves, hu ma yi wind, tiger whistling the wind, dragons and clouds, slow belt and light fur, waved the wind, the wind and the breeze, the wind and the smooth, the wind and the rain, the wind and the rain, the wind of Kei San and the stormy wind and the stormy rain, The stormy wind put strong grass the test, the stormy wind and rain, the stormy wind and thunder, the stormy wind and rain, the clear wind and clear moon, the dusty wind, the flags rolled up, the foggy wind, the gusty wind does not end in the morning, the sudden rain does not end in the day, the gusty wind is furious, the gusty wind is furious, the gusty wind is furious, the gusty wind is long, the gusty wind is long, the gusty wind and rain is ambush rain, the clear moon and the clear air, the music and spring of the forest, the wind and the moon, the east wind of the horse, the wind and the rain, the wind and the snow, the stormy weather, the wind and the rain that is blind and envious of the rain that is 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wind, the revilement of the wind, the wind blowing, the rain towel, the wind hat, the rain haze, the wind barrier, the rain, the wind, the wind, the rain, the wind, the rain, the wind, the rain, the wind, the wind, the wind revilement, the darkness of the moon and the high winds, the moon before the wind, the moon, the moon, the wind, the lightness of the clouds, the cloud dragon and the wind and the tiger, the clouds, the wind, the clouds, the water, the water, the clouds, the wind, the wind, the clouds, the wind, the sky and the earth, the wind and the boom of the horses, the wind and the rain, the rain, the wind, the wind and the rain, the wind, the rain and the rain, the bead foil, the silver screen,