February 10, 2025, Monday
Nepal 1:37:26 pm

Earth’s temperatures rising: NASA confirms 2024 as warmest year

The Nepal Weekly
January 14, 2025

Earth’s average surface temperature in 2024 was the warmest on record, according to an analysis led by NASA scientists.

Global temperatures in 2024 were 2.30 degrees Fahrenheit (1.28 degrees Celsius) above the agency’s 20th-century baseline (1951-1980), which tops the record set in 2023. The new record comes after 15 consecutive months (June 2023 through August 2024) of monthly temperature records — an unprecedented heat streak.

“Once again, the temperature record has been shattered — 2024 was the hottest year since record keeping began in 1880,” said NASA Administrator Bill Nelson. “Between record breaking temperatures and wildfires currently threatening our centers and workforce in California, it has never been more important to understand our changing planet.”

NASA scientists further estimate Earth in 2024 was about 2.65 degrees Fahrenheit (1.47 degrees Celsius) warmer than the mid-19th century average (1850-1900). For more than half of 2024, average temperatures were more than 1.5 degrees Celsius above the baseline, and the annual average, with mathematical uncertainties, may have exceeded the level for the first time.

“The Paris Agreement on climate change sets forth efforts to remain below 1.5 degrees Celsius over the long term. To put that in perspective, temperatures during the warm periods on Earth three million years ago — when sea levels were dozens of feet higher than today — were only around 3 degrees Celsius warmer than pre-industrial levels,” said Gavin Schmidt, director of NASA’s Goddard Institute for Space Studies (GISS) in New York. “We are halfway to Pliocene-level warmth in just 150 years.”

2024 was Earth’s warmest year since modern record-keeping began around 1880, and the past 10 consecutive years have been the warmest 10 on record.

Scientists have concluded the warming trend of recent decades is driven by heat-trapping carbon dioxide, methane, and other greenhouse gases. In 2022 and 2023, Earth saw record increases in carbon dioxide emissions from fossil fuels, according to a recent international analysis. The concentration of carbon dioxide in the atmosphere has increased from pre-industrial levels in the 18th century of approximately 278 parts per million to about 420 parts per million presently.

NASA and other federal agencies regularly collect data on greenhouse gas concentrations and emissions. These data are available at the U.S. Greenhouse Gas Center, a multi-agency effort that consolidates information from observations and models, with a goal of providing decision-makers with one location for data and analysis.

The temperatures of individual years can be influenced by natural climate fluctuations such as El Niño and La Niña, which alternately warm and cool the tropical Pacific Ocean. The strong El Niño that began in fall 2023 helped nudge global temperatures above previous records.

This data visualization, which is updated monthly, shows monthly global temperature anomalies on Earth’s surface, and how those temperatures deviate from the average from 1951 to 1980.

The heat surge that began in 2023 continued to exceed expectations in 2024, Schmidt said, even though El Niño abated. Researchers are working to identify contributing factors, including possible climate impacts of the January 2022 Tonga volcanic eruption and reductions in pollution, which may change cloud cover and how solar energy is reflected back into space.

Furthermore, four of the six international datasets crunched by WMO indicated a higher than 1.5! global average increase for the whole of last year but two did not. The 1.5! marker is significant because it was a key goal of the 2015Paris Agreement to try to ensure that global temperature change does not rise more than this above pre-industrial levels, while striving to hold the overall increase to well below 2!.

The Paris Agreement is “not yet dead but in grave danger”, the WMO maintained, explaining that the accord’s long-term temperature goals are measured over decades, rather than individual years.

However, WMO Secretary-General Celeste Saulo insisted that ”climate history is playing out before our eyes. We’ve had not just one or two record-breaking years, but a full ten-year series. “It is essential to recognize that every fraction of a degree of warming matters. Whether it is at a level below or above 1.5C of warming, every additional increment of global warming increases the impacts on our lives, economies and our planet.”

Amid still raging deadly wildfires in Los Angeles that weather experts including the WMO insist have been exacerbated by climate change – with more days of dry, warm, windy weather on top of rains which boosted vegetation growth – the UN agency said that 2024 capped a decade-long “extraordinary streak of record-breaking temperatures”.

UN Secretary General Antonio Guterres described the WMO’s findings as further proof of global warming and urged all governments to deliver new national climate action plans this year to limit long-term global temperature rise to 1.5C – and support the most vulnerable deal with devastating climate impacts.

“Individual years pushing past the 1.5! limit do not mean the long-term goal is shot,” Mr. Guterres said. “It means we need to fight even harder to get on track. Blazing temperatures in 2024 require trail-blazing climate action in 2025,” he said. “There’s still time to avoid the worst of climate catastrophe. But leaders must act – now.” (Agencies)