Shulou(Shulou.com)11/24 Report--

CTOnews.com, June 19 (Xinhua)-- the tilt angle of the earth changed between 1993 and 2010, increasing by 31.5 inches (CTOnews.com Note: about 800.1 millimeters), scientists found. During this time, man pumped 2.15 trillion tons of water from natural reservoirs in the earth's crust. If all this water is poured into the global oceans, the sea level will rise by 6 millimeters.

A new study reveals the effect of pumping so much groundwater on the earth's rotation axis, and scientists have come to this conclusion by simulating changes in the position of the earth's rotation poles. The pole of the earth's rotation refers to the point at which the earth's imaginary axis intersects the earth's surface, which does not completely coincide with the geographical north and south poles and changes with the passage of time, so the rotation axis will cut through different positions of the earth's crust at different times.

Scientists have known since 2016 that rotation poles are affected by climate-related processes, such as the melting of icebergs and the redistribution of locked water mass. But it wasn't until the researchers added the extracted groundwater to their model that the results coincided with observations. If the extracted groundwater is not taken into account, the model will deviate from 78.5 cm.

"the pole of the earth's rotation actually changes a lot," Xu Jiyuan, a geophysicist at Seoul National University who led the study, said in a statement. our research shows that among the climate-related reasons, the redistribution of groundwater has the greatest impact on the drift of the rotation pole. "

Because the tilt of the earth's axis affects the seasonal weather on the surface, scientists now want to know whether changes in the pole of rotation will have an impact on the long-term climate.

"observing the changes in the earth's rotation poles is useful for understanding changes in water reserves on a continental scale," Xu said. The rotation pole data can be traced back to the end of the 19th century. Therefore, we can use these data to understand the changes in the continent's water reserves over the past 100 years. Is there a change in the hydrological cycle caused by climate warming? rotation poles may reveal the answer. "

The poles of the earth's rotation move a few meters a year, and the contribution of drained groundwater reservoirs to this movement depends on their position on the earth. The study shows that the water extracted in the middle latitudes has the greatest influence on the tilt angle of the earth. Therefore, managing global groundwater flows can help limit the movement of rotation poles, thereby limiting the potential climate impacts that follow.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.