China News Service, Bangor County, Tibet, August 5 (Reporter Sun Zifa) China's second comprehensive scientific expedition to the Qinghai-Tibet Plateau (Second Qinghai-Tibetan scientific expedition) "History of Human Activities and Its Impact" scientific expedition team, August 3 to On the 4th, the expedition completed the scientific expedition on the plateau lake Bamutuo in Bangor County, Tibet Autonomous Region, at an altitude of more than 4,500 meters. The expedition team successfully collected long rock cores and lakes at the bottom of the lake through scientific expedition equipment such as lake drilling platforms and grabs. Samples of sediment and topsoil in the watershed meet the needs of subsequent laboratory analysis and research.
Scientific research team members collected scientific research samples from Bamu Co.
Photo by China News Agency reporter Sun Zifa
"Bamu Co is also known as the Warrior Lake, and the team members are also a group of warriors. They use their wisdom and sweat to complete the scientific expeditions of the Warrior Lake." said Hou Xiaohuan, a member of the scientific expedition team and a PhD student at the Institute of Tibetan Plateau Research of the Chinese Academy of Sciences (Tibetan Plateau Institute of the Chinese Academy of Sciences).
Researcher Hou Juzhi from the Qinghai-Tibet Plateau Institute of the Chinese Academy of Sciences, the leader of the scientific expedition, drove an inflatable speedboat.
Photo by China News Agency reporter Sun Zifa
He introduced that Bamu Co is one of the key lakes of this scientific expedition mission, and it is also the last scientific expedition lake in the itinerary that camps on the lakeshore and uses the lake drilling platform to operate.
The scientific expedition team departed from Bangor County in the early morning of August 3 and rushed to the shore of Bam Co Lake. Based on the accumulated experience in the early stage, the scientific expedition equipment such as the lake drilling platform was assembled and debugged in the shortest time, hoping to achieve the fastest speed. Complete the sampling operation in Bamu Co.
However, due to the rainy season in Tibet at the beginning of August, the sky over the Bamu Co Lake was densely covered with clouds and rain was about to come on that day.
The scientific expedition team members took the inflatable speedboat to push the lake drilling platform to the center of the lake, and immediately began drilling and sampling work. However, halfway through the first drilling work, the lake surface was violent, the wind was high and the waves were violent, and the inflatable speedboat and the lake drilling platform were violent. Shaking, being on it is like a roller coaster.
Viewed from the camp on the shore with a telephoto lens, the scientific expedition team was working in the wrong way in Bamu.
Photo by China News Agency reporter Sun Zifa
In this emergency situation, the leader of the scientific expedition and researcher Hou Juzhi from the Institute of Qinghai-Tibet Plateau of the Chinese Academy of Sciences immediately stopped drilling and decided to return to the shore. When the weather improves, they will work again and contact the shore camp to prepare to camp and stay overnight in Bamu Co. By the lake.
For the next period of time, the Bam Co Lake had been blowing with cold wind, rainy and cloudy, and the temperature was so cold that it was impossible to carry out scientific research work on the lake.
The rain did not decrease until around 10 am on the 4th, and the wind and waves on the lake also weakened.
The expedition team members immediately decided to take the rain as soon as possible to complete the expedition in Bam Co, and finally successfully collected about 5 meters of lake bottom sediment core, and obtained multiple lake surface sediment samples, and also collected one in the Bam Co watershed. Series of topsoil samples.
The scientific expedition team returned from sampling in Bamucuo.
Photo by China News Agency reporter Sun Zifa
Hou Xiaohuan said that Bamu Co is a semi-convective lake, and its organic matter is well preserved, which is particularly conducive to the use of biomarker compounds to reconstruct past climate and environmental changes in the region. Among them, the Bamu Co sediment core is a good carrier for reconstructing past temperature changes. .
The surface sediment samples of Bam Co Lake and the surface soil samples in the watershed collected in this scientific expedition are mainly used to study the modern process of the plateau lakes, to understand the scientific significance of relevant climate proxy indicators, and to establish the relationship between the indicators and climate and environmental factors. , In order to help in-depth study of climate and environmental changes in the Qinghai-Tibet Plateau.
Scientific research team members collected scientific research samples from Bamu Co.
Photo by China News Agency reporter Sun Zifa
According to the public notice from the chief of the rivers and lakes in Nagqu City, Tibet, Bam Co is located to the east of Bangor County and is a sister lake nestled not far from Nam Co.
Bamu Co is 4555 meters above sea level and covers an area of about 180 square kilometers. The average annual precipitation in the lake area is 300-400 mm, and the average annual temperature is 0-2 degrees Celsius.
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