Why do you want to see the weather on the roof of the world?
The snowfall on the Qinghai-Tibet Plateau in that winter will directly affect the distribution of summer precipitation in China in the coming year. Gao, a researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, who took the lead in completing the three-pole scientific investigation of the earth in China, said that when the snow is thick and wide in winter, the precipitation in June and July next year will mainly be distributed in the south of the Yangtze River; However, if the snow is thin and the area is small, the precipitation at the same time in the next year will jump from Jiangnan to Huanghuai basin north of the Yangtze River.
In addition, the dividing line between the southwest monsoon and the southeast monsoon in Asia is just about 70 east longitude on the south side of the Qinghai-Tibet Plateau. Gao Zeng proved through simulation experiments that if there were no Qinghai-Tibet Plateau, the dividing line between the two monsoons would move eastward by about 20%, which would lead to different distribution of precipitation and rainy season in Asia, thus affecting the climate environment in various regions.
What can the highest automatic weather station see?
1980, Gao led a scientific research team to cooperate with the national mountaineering team, hoping to install two automatic weather stations at an altitude of 7000m and 7500m. However, due to the immaturity of telemetry technology, reliable data have not been obtained.
This round of Everest expedition completed the erection of the world's highest automatic weather station.
Gao said that the establishment of these weather stations will help scientists to further study the impact of mountainous areas on the atmospheric environment. Generally speaking, the atmospheric temperature below the altitude 16 km decreases with the increase of altitude. However, according to the existing preliminary observations, the temperature of Mount Everest does not drop completely according to this law. Gao pointed out that Mount Everest is like a heated chimney. When the heat source rises above 8000 meters above sea level, many strange phenomena will appear. For example, its heating effect can affect the temperature of 600 kilometers downstream, making the temperature of the downstream 65,438+0.3 higher than that of the upstream in spring.
The establishment of this meteorological station will also help researchers to better observe the distribution of the ozone layer over the Qinghai-Tibet Plateau and further study its causes and changing laws.
Gao has visited Mount Qomolangma many times for scientific investigation. He sincerely lamented that "progress is changing with each passing day." He recalled that due to the backward oxygen supply technology, researchers had to carry oxygen bottles about 0/6 times the weight of the current/kloc-0, but the volume was only116 oxygen supply equipment. In order to save oxygen, climbers can only take oxygen at an altitude of more than 8000 meters. "Vehicles transporting food and other safety materials often break down on the road. In order to complete the task of data extraction and weather forecast, we walked dozens of kilometers hungry. " Gao said.
Producer: Bai Zhonghua