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Leap Second

All articles tagged with #leap second

Climate-Driven Spin: Melting Ice Lengthens Earth’s Day and Nudges GPS
science17 days ago

Climate-Driven Spin: Melting Ice Lengthens Earth’s Day and Nudges GPS

New research ties climate-driven water redistribution from melting ice to a measurable slowdown in Earth’s rotation, lengthening the day by about 1.3 milliseconds per century. By analyzing 3.6 million years of benthic foraminifera fossils and deep learning, scientists find this rate is unprecedented in the Quaternary and could, by the end of the century, surpass the Moon’s tidal effect, complicating leap seconds and precise GPS-based navigation.

via The Daily Galaxy|
#climate-change#day-length#earth-rotation
Earth's Shortest Day in History: Scientists Link Speedup to the Moon
science9 months ago

Earth's Shortest Day in History: Scientists Link Speedup to the Moon

Earth's rotation has been speeding up this summer due to the moon's position, causing days to be slightly shorter, with upcoming days on July 22 and August 5 expected to be the shortest of the year by a few milliseconds. This change is linked to the moon's gravitational influence, and while the milliseconds are imperceptible to most, they are crucial for precise systems like GPS and computers. Historically, Earth's days have been lengthening over billions of years, but recent observations show a temporary acceleration in rotation.

via Live Science|
#earth-rotation#leap-second#moon-gravitational-pull
"Climate Change's Impact on Earth's Rotation and Timekeeping"
science-and-environment2 years ago

"Climate Change's Impact on Earth's Rotation and Timekeeping"

Earth's rotation, which has been speeding up due to dynamics in the planet's liquid outer core, is now slowing down due to the impact of global warming on the polar ice caps. This is likely to delay the need for a deleted leap second until 2028 or 2029. The redistribution of mass from the poles to the world's oceans is causing the slowdown, counteracting the previous speed-up. This unprecedented event, caused by changes in the Earth's rotation, could have significant implications for precise timekeeping in today's interconnected world.

via Yahoo Life|
#climate-change#earths-rotation#global-warming
"Human Activities Accelerating Earth's Spin, Prompting Time Adjustment"
science-and-technology2 years ago

"Human Activities Accelerating Earth's Spin, Prompting Time Adjustment"

Timekeeping scientists are considering subtracting a leap second from atomic clocks to adjust for the Earth's faster-than-expected rotation due to climate change, marking the first instance of removing a second rather than adding one. The Earth's rotation has been gradually slowing, leading to the addition of 27 leap seconds between 1972 and 2016, but now the melting poles are causing the need for a negative leap-second correction as early as 2026. This adjustment has implications for systems reliant on precise timekeeping, such as GPS satellites and financial transactions, and highlights the complex relationship between atomic timekeeping and our understanding of time.

via HODINKEE|
#atomic-clocks#climate-change#earths-rotation
"Human-Induced Climate Change Threatens Earth's Timekeeping"
science2 years ago

"Human-Induced Climate Change Threatens Earth's Timekeeping"

Planet Earth is set to lose a second due to the acceleration of its rotation, marking the first time in history for such an adjustment. This change, expected to occur in the near future, is a significant event as it disrupts the traditional alignment of time with the Earth's rotation. While not anticipated to lead to a catastrophe, the unprecedented nature of this situation raises concerns about potential unknown problems and risks, prompting world experts to assess the likelihood and implications of eliminating a second from timekeeping.

via LADbible|
#earths-rotation#geophysics#international-bureau-of-weights-and-measures
"Global Warming's Impact on Earth's Rotation and Timekeeping"
science-and-technology2 years ago

"Global Warming's Impact on Earth's Rotation and Timekeeping"

Earth's rotation is speeding up, potentially necessitating the subtraction of a second from world clocks around 2029, a phenomenon known as a "negative leap second." This change is attributed to the planet's hot liquid core and rapid melting of ice at the poles. The discrepancy between astronomical and atomic time, which has been managed through leap seconds, poses challenges for computer systems and technology. While some advocate for eliminating leap seconds altogether, others argue for maintaining the current system.

via KABC-TV|
#atomic-clocks#earths-rotation#geophysics
"Human-Induced Climate Change Alters Earth's Timekeeping"
science-and-environment2 years ago

"Human-Induced Climate Change Alters Earth's Timekeeping"

Polar ice melt driven by climate change is affecting Earth's rotation, leading to a potential need to "skip" a second in 2029 to adjust timekeeping. This human-driven change in Earth's rotation, a first of its kind, may impact computing. The melting ice is causing the planet to grow wider around the middle, slowing its rotation, and as a result, the need for leap seconds may pose significant challenges for precise timekeeping in critical digital infrastructure.

via Business Insider|
#climate-change#earths-rotation#leap-second
"Melting Polar Ice Slows Earth's Rotation, Prompting Time Adjustment"
science-and-technology2 years ago

"Melting Polar Ice Slows Earth's Rotation, Prompting Time Adjustment"

Earth's rotation is speeding up, potentially requiring a "negative leap second" to be subtracted from world clocks around 2029, due to the planet rotating faster than before. This unprecedented situation is attributed to the melting of ice at the poles counteracting the Earth's increased speed. The discrepancy between astronomical and atomic time, caused by the Earth's varying rotation rate, has led to the need for leap seconds to be added periodically. However, the prospect of subtracting a second poses challenges for computer systems and timekeepers, prompting tech companies to implement their own solutions. While some experts believe a negative leap second will be necessary, others argue that predicting long-term trends in Earth's rotation is uncertain.

via WDSU New Orleans|
#climate-change#earths-rotation#geophysics
"Melting Polar Ice Slows Earth's Rotation, Prompting Time Adjustment"
science-and-technology2 years ago

"Melting Polar Ice Slows Earth's Rotation, Prompting Time Adjustment"

Earth's changing spin may necessitate the subtraction of a second from world clocks around 2029 due to the planet rotating faster than before, a situation described as "unprecedented" by scientists. The Earth's slowing rotation, caused by tides, has been counteracted by the melting of ice at the poles, delaying the need for a "negative leap second." This complex issue involves physics, global politics, climate change, and technology, with implications for timekeeping systems and computer operations. While some experts believe a negative leap second is inevitable, others argue that long-term predictions about Earth's rotation are uncertain.

via 4029tv|
#atomic-clocks#earths-rotation#geophysics