2020 ties 2016 as hottest year on record, even without warming boost from El Niño
LA TimesCrowds in Huntington Beach during a triple-digit heat wave on Labor Day weekend 2020. Last year’s average global surface temperature was 2.2 degrees Fahrenheit above the late 19th century average, according to NASA. The fact that the planet’s average temperature reached such heights — absent the short-term warming effect of El Niño — reveals the unmistakable signal of human-caused greenhouse gas emissions, researchers said. “It shows that five years of human CO2 emissions can have nearly as large an impact on global temperatures as a super El Niño event, and reinforces the fact that our emissions are what is driving the rapid warming of the planet over the past few decades,” Hausfather said. “That’s why what was a super El Niño event two decades ago, in 1998 for example, would be a remarkably cold year today.” NASA, the National Oceanic and Atmospheric Administration and other research organizations that compile global temperature rankings rely on much of the same data, including measurements from weather stations, ships and buoys spread across the planet.