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500 million years of climate change [7] The Phanerozoic eon, encompassing the last 542 million years and almost the entire time since the origination of complex multi-cellular life, has more generally been a period of fluctuating temperature between ice ages, such as the current age, and "climate optima", similar to what occurred in the ...
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.
According to IPCC Sixth Assessment Report, in the last 170 years, humans have caused the global temperature to increase to the highest level in the last 2,000 years. The current multi-century period is the warmest in the past 100,000 years. [3] The temperature in the years 2011-2020 was 1.09 °C higher than in 1859–1890.
And in Arizona, the city of Phoenix logged a record 113 straight days with triple-digit high temperatures last year. The previous record of 76 consecutive days was set in 1993. The previous record ...
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.
A new record-high daily global average temperature was reached on July 22, at 30.8 degrees. Every month since July 2023, except for July 2024, was above the 2.7 degrees Fahrenheit (1.5 C) threshold.
The global temperature averaged over the past year is more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) higher than pre-industrial times, seeming to exceed the global agreed upon limit for ...
By March 26, 2020, the United States, with the world's third-largest population, surpassed China and Italy as the country with the world's highest number of confirmed cases. [86] By April 25, the U.S. had more than 905,000 confirmed coronavirus cases and nearly 52,000 deaths, giving it a mortality rate around 5.7 percent.