Weather forecast in Dingri county

Environmental problems of Mount Everest (environment, climate) Current environmental conditions and climate.

Let me introduce you.

Mount Qomolangma is located in Dingri County, Xizang Autonomous Region, at the junction of China, Tibet and Nepal. It is the main peak of the Himalayas, the highest mountain system in the world, with an altitude of 8848+03m, making it the highest mountain in the world.

In Tibetan, "Mount Qomolangma" means the goddess, "Langma" is the third, and Mount Qomolangma is also the "third goddess peak" affectionately called by local people. According to legend, a long time ago, there was a vast sea near Mount Everest. There are dense flowers, bees and butterflies at the foot of Mount Everest. One day, a five-headed demon suddenly came and tried to occupy this beautiful place. It stirred the sea, destroyed the forest, and destroyed flowers and trees. For a time, a rich and fertile place became smoky and devastated. Just as the birds and animals were desperate to die, a colorful auspicious cloud floated from the east and turned into five intelligent dakini, exerting infinite magic and subduing five demons. Since then, the sea has become calm, and all living here are grateful to worship the fairy. Dakini mothers want to return to heaven after their success, but all sentient beings implore that they can stay forever, be blessed and enjoy peace with all sentient beings. Divines finally agreed, and they ordered the sea to recede, so that the forest in the east was dense, the fertile fields in the west, the lush grasslands in the south and the endless pastures in the north. The five fairies have also become five peaks in the Himalayas, stationed on the earth, and the third fairy is the tallest and most handsome. She is Mount Everest.

Yun Qi is a special scenery of Mount Everest. As the name implies, Yun Qi is shaped like a flag, flying at the top of Mount Everest, and is called "the highest weather vane in the world". It reflects the movement of high-altitude airflow. Experienced meteorologists and mountaineers can take the change of flag cloud shape as a parameter of mountaineering weather forecast. The formation of Yun Qi is related to the special height of Mount Everest and the specific natural geographical environment. Yun Qi has been missing all day. It occurs after sunrise, most obviously around noon. After three or four o'clock in the afternoon, due to the strengthening of air convection, the clouds developed rapidly, and the top of the mountain was covered by other clouds, so Yun Qi could not be seen.

Mount Qomolangma is pyramid-shaped. According to scientific calculation, the lowest temperature at the summit is -56 degrees Celsius, which is lower than Mohe, the coldest place in China. The mountains are covered with snow all year round, and glaciers, ice slopes and ice towers can be seen everywhere. The air on the top of the mountain is thin, and there are often seven or eight winds, and twelve winds are also common.

This area is the activity center of glaciers in Chinese mainland. According to the data, there are 2 17 glaciers in China, covering an area of more than 700 square kilometers, of which several glaciers are more than 20 kilometers long and the longest flannel glacier is 22 kilometers.

Mount Everest has the largest number of suspended glaciers, and the scale is relatively small, generally not exceeding one square kilometer, and the ice thickness is one to twenty meters. As the name implies, this glacier is characterized by its end hanging on a steep slope. From a distance, rows of suspended glaciers hang like white shields on steep slopes. Hanging glaciers are generally developed on the remains of ancient glaciers. During the ancient glacial period, tributary glaciers converged into mainstream glaciers. Due to the differences in ice thickness, running speed and ice erosion ability between the main glacier and the tributary glacier, the main canyon of the glacier was strongly cut down and the sub-canyons had to be hung on the mountainside. At present, due to the shrinking scale of glaciers, the mainstream of glaciers has shrunk or disappeared because of insufficient supply. Tributary glaciers can only be attached to steep slopes, and ice collapses often occur due to the collapse of the lower end.

There are also large-scale glaciers-ice bucket glaciers, which are distributed near the top of the mountain or on both sides of the watershed. Under the action of weathering and ice erosion, the mountain was cut, and the mountain was cut into barrel-shaped valleys, like huge seats, where glaciers developed. Ice bucket glaciers are nearly oval in shape, some are similar to triangles, and the surface of the glaciers is concave, which slowly inclines to the glacier outlet. Some ice bucket glaciers push towards the valley and extend in strips, becoming valley glaciers. Where glaciers are concentrated, several valley glaciers are often connected, like Yulong coiled in the mountains.

The low latitude of Mount Qomolangma, the strong solar radiation and the microclimate difference on the glacier surface make the ice difference melt and form many wonderful scenery. Ice mushrooms are big stones supported by thin icicles, some of which can be as high as 5 meters. The ice bridge is like a glittering and translucent bond, connecting two cliffs, as if it were intended to "protect the media" for the two cliffs. The ice wall is steep and upright, like a huge screen, which makes people afraid. Ice buds and needles can be seen everywhere, which is a strange and beautiful ornament. The most amazing thing is the ice tower forest. At an altitude of 5,700 meters to 6,300 meters, it is a "crystal pagoda"-the world of ice towers. On the flannel glacier on the north slope of Mount Everest, there is a 5.5-kilometer-long ice tower forest belt. Milky white ice towers rise from the ground, one after another, up to tens of meters. Some are like majestic pyramids; Some are like the solemn bell tower of an ancient temple; Some are like swords, stabbing the sky; Some walk peacefully like docile giraffes, all dazzling. No wonder some people say that entering the ice tower forest is like being in a fairyland.

The continuous peaks in the Himalayas block the warm and humid airflow from the Indian Ocean, so the climate on the northern slope is dry and the vegetation is sparse. But in the mountains, it is also full of vitality. The yak here is burly and strong; Wild donkeys are rare animals in the world; Rock sheep and plateau rats often haunt; Snow chickens flock to the inaccessible glaciers. These lives on the ice sheet at an altitude of 6000 meters tell people that life is very tenacious.

According to the investigation results of China's scientific investigation on Mount Everest 1992, the water pollution of Mount Everest cannot be ignored. For example, arsenic (As), commonly known as an important component of arsenic, usually exists in volcanic ash sulfur or coal combustion products. 1975 was 1.33 μ g/L, while 1992 has reached 14.9 μ g/L, with an increase of more than 10 times. 1992 The mercury content in Rongbuhe River on the north slope of Mount Everest was 0. 15 μ g/L, which was lower than 0.2 μ g/L in the Yangtze River and Yellow River announced by the State Environmental Protection Bureau, while the mercury content in the Pearl River water in1938+February was lower than 0. 1 μ g/L.