Groundwater depletion causes Earth's axis to shift by 31.5 inches: Study
A recent study has uncovered a significant impact of human activity on the planet: Earth's axis has shifted by 31.5 inches (nearly 80 centimeters) due to extensive groundwater extraction. Published in the journal Geophysical Research Letters, the research highlights how large-scale pumping of groundwater has changed the distribution of Earth's mass, affecting its rotation and contributing to sea-level rise. The shift in Earth's tilt is linked to a sea-level increase of 0.24 inches, according to Popular Mechanics.
Lead researcher Ki-Weon Seo, a geophysicist at Seoul National University, explained that among climate-related factors, the redistribution of groundwater has had the most significant effect on the movement of Earth's rotational pole. The planet's tilt, or axial precession, is influenced by changes in mass distribution. As glaciers and polar ice sheets in Greenland and Antarctica melt, water migrates towards the equator, shifting the planet's balance—a phenomenon comparable to how a figure skater’s spin changes when they alter their body position.
The study examined data from 1993 to 2010, revealing that approximately 2,150 gigatons of groundwater were pumped out during this time, largely for agricultural and human consumption. This large-scale extraction has contributed to a shift in Earth's axis of about 31.5 inches.
Groundwater, which is water stored underground in soil and rock, plays a crucial role in the hydrological cycle. It originates from precipitation that seeps into the earth, replenishing natural aquifers. These aquifers are vital freshwater resources, supporting drinking water supplies, agriculture, and industry. The availability and quality of groundwater depend on natural factors like recharge rates and human activity.
While the 31.5-inch shift in Earth's axis might seem minor, the consequences could be far-reaching over geological timescales. Changes in water distribution can lead to varying sea-level changes across regions, affecting coastal areas differently. Additionally, shifts in Earth's tilt can influence its internal systems, such as the magnetic field, which acts as a shield against harmful solar radiation.
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Vijay unable to prove majority, not invited for CM oath ceremony: Sources
Chennai: Actor-politician Vijay has reportedly not been invited to take oath as Chief Minister of Tamil Nadu after failing to demonstrate support from the required number of MLAs, sources in Raj Bhavan said.
According to media reports that quoted sources in the office of R.N. Ravi Arlekar, Vijay could not prove the backing of 118 legislators, the majority mark in the 234-member Tamil Nadu Assembly.
Despite last-minute efforts to secure support from the Viduthalai Chiruthaigal Katchi (VCK), Amma Makkal Munnetra Kazagam (AMMK), and an IUML legislator, Vijay reportedly managed support from only 116 MLAs, falling short by two members.
Sources said Vijay failed to submit letters of support from the VCK and the Indian Union Muslim League (IUML).
Later, the IUML issued a statement clarifying that it was not part of the TVK-led alliance.
Meanwhile, AMMK leader T.T.V. Dhinakaran is also said to have informed the Governor that his party would support the All India Anna Dravida Munnetra Kazhagam (AIADMK) instead.
Earlier in the evening, Vijay had met Governor Arlekar and staked claim to form the government, stating that he enjoyed the support of 118 MLAs.
