• Climate change is slowing Earth’s rotation. Here’s what that means for the length of our days
  Until now, scientists did not believe that humans could control the rate of the Earth’s spin—but that’s exactly what a new study in ‘Nature’ suggests.

• Earth’s rotation is slowing down due to melting ice, satellite measurements show

• Climate change is impacting rotation of the earth: Scripps Institution researcher
  The warming over the Arctic that’s melting ice over Greenland and Alaska has been slowing down the earth’s rotation, which has impacted time, according to researcher Duncan Agnew

• Global Warming Is Slowing the Earth’s Rotation
  Drastic polar ice melt is slowing Earth’s rotation, counteracting a speedup from the planet’s liquid outer core. The upshot is that we might need to subtract a leap second for the first time ever within the decade

A global timekeeping problem postponed by global warming

Abstract

The historical association of time with the rotation of Earth has meant that Coordinated Universal Time (UTC) closely follows this rotation. Because the rotation rate is not constant, UTC contains discontinuities (leap seconds), which complicates its use in computer networks. Since 1972, all UTC discontinuities have required that a leap second be added. Here we show that increased melting of ice in Greenland and Antarctica, measured by satellite gravity, has decreased the angular velocity of Earth more rapidly than before. Removing this effect from the observed angular velocity shows that since 1972, the angular velocity of the liquid core of Earth has been decreasing at a constant rate that has steadily increased the angular velocity of the rest of the Earth. Extrapolating the trends for the core and other relevant phenomena to predict future Earth orientation shows that UTC as now defined will require a negative discontinuity by 2029. This will pose an unprecedented problem for computer network timing and may require changes in UTC to be made earlier than is planned. If polar ice melting had not recently accelerated, this problem would occur 3 years earlier: global warming is already affecting global timekeeping. <Source>

[OCS: Most scientific systems use atomic clocks and not computerized clocks. Computer clocks are not only notoriously inaccurate because the frequency that makes time increase is never exactly right, but they must be re-synced with external sources to be helpful. So if scientists must adjust the master clocks periodically, it has absolutely no effect on mere mortals.]