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Solar luminosity was 30% dimmer when the Earth formed 4.5 billion years ago, [14] and it is expected to increase in luminosity approximately 10% per billion years in the future. [15] On very long time scales, the evolution of the sun is also an important factor in determining Earth's climate.
The largest eruptions of the last 100 years, such as the Mount Pinatubo eruption in 1991 and Mount Agung eruption in 1963-1964, have been followed by years with global mean temperatures 0.1 °C to 0.2 °C below long-term trends at the time. [citation needed] Land use change like deforestation can increase greenhouse gases through burning biomass.
Changes in climate at 2.8, 1.7, and 1.0 million years ago correlate well with observed transitions between recognized hominin species. [8] It is difficult to differentiate correlation from causality in these paleopanthropological and paleoclimatological reconstructions, so these results must be interpreted with caution and related to the ...
500 million years of climate change Ice core data for the past 400,000 years, with the present at right. Note length of glacial cycles averages ~100,000 years. Blue curve is temperature, green curve is CO 2, and red curve is windblown glacial dust (loess). Scale: Millions of years before present, earlier dates approximate.
In 1862, Lord Kelvin calculated the age of the Earth at between 20 million and 400 million years by assuming that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface to cool to its present temperature.
January 2025 was 3.15 degrees Fahrenheit (1.75 degrees Celsius) above pre-industrial levels and was the 18th month of the last 19 in which the average temperature globally was above the 2.7-degree ...
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The world may have just broken the record for the hottest global average temperature ever recorded for the third time this week, according to data from the U.S. National Centers for Environmental ...