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Temperatures Rising: NASA Confirms 2024 Warmest Year on Record


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2024gistempmap.jpg?w=800
This map of Earth in 2024 shows global surface temperature anomalies, or how much warmer or cooler each region of the planet was compared to the average from 1951 to 1980. Normal temperatures are shown in white, higher-than-normal temperatures in red and orange, and lower-than-normal temperatures in blue. An animated version of this map shows global temperature anomalies changing over time, dating back to 1880. Download this visualization from NASA Goddard’s Scientific Visualization Studio: https://svs.gsfc.nasa.gov/5450.
Credit: NASA’s Scientific Visualization Studio

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.”

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 today.

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.

Exceptional heat trends

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.

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.

“Not every year is going to break records, but the long-term trend is clear,” Schmidt said. “We’re already seeing the impact in extreme rainfall, heat waves, and increased flood risk, which are going to keep getting worse as long as emissions continue.”

Seeing changes locally

NASA assembles its temperature record using surface air temperature data collected from tens of thousands of meteorological stations, as well as sea surface temperature data acquired by ship- and buoy-based instruments. This data is analyzed using methods that account for the varied spacing of temperature stations around the globe and for urban heating effects that could skew the calculations.

A new assessment published earlier this year by scientists at the Colorado School of Mines, National Science Foundation, the National Atmospheric and Oceanic Administration (NOAA), and NASA further increases confidence in the agency’s global and regional temperature data.

“When changes happen in the climate, you see it first in the global mean, then you see it at the continental scale and then at the regional scale. Now, we’re seeing it at the local level,” Schmidt said. “The changes occurring in people’s everyday weather experiences have become abundantly clear.”

Independent analyses by NOAA, Berkeley Earth, the Hadley Centre (part of the United Kingdom’s weather forecasting Met Office) and Copernicus Climate Services in Europe have also concluded that the global surface temperatures for 2024 were the highest since modern record-keeping began. These scientists use much of the same temperature data in their analyses but use different methodologies and models. Each shows the same ongoing warming trend.

NASA’s full dataset of global surface temperatures, as well as details of how NASA scientists conducted the analysis, are publicly available from GISS, a NASA laboratory managed by the agency’s Goddard Space Flight Center in Greenbelt, Maryland.

For more information about NASA’s Earth science programs, visit: 

https://www.nasa.gov/earth

-end-

Liz Vlock
Headquarters, Washington
202-358-1600
elizabeth.a.vlock@nasa.gov


Peter Jacobs
Goddard Space Flight Center, Greenbelt, Md.
301-286-0535
peter.jacobs@nasa.gov

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      More About Juno
      NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington. The Italian Space Agency funded the Jovian InfraRed Auroral Mapper. Lockheed Martin Space in Denver built and operates the spacecraft. Various other institutions around the U.S. provided several of the other scientific instruments on Juno.
      More information about Juno is at: https://www.nasa.gov/juno
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      DC Agle
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      Karen Fox / Molly Wasser
      NASA Headquarters, Washington
      202-358-1600
      karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
      Deb Schmid
      Southwest Research Institute, San Antonio
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      dschmid@swri.org
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      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      NASA’s annual Student Launch challenge will bring middle school, high school, and college students from around the country together to launch high-powered rockets and payloads. On Saturday, May 3, from 8:30 a.m.-2:30 p.m. CDT (or until the last rocket launches), student teams will convene for the agency’s 25th annual challenge at Bragg Farms in Toney, Alabama, near NASA’s Marshall Space Flight Center in Huntsville. 
      Hundreds of students from across the U.S. and Puerto Rico launched amateur rockets near NASA’s Marshall Space Flight Center in Huntsville, Alabama, during the Agency’s 2024 Student Launch competition. NASA Live streaming will begin at 8:20 a.m. CDT on NASA Marshall YouTube.
      Media interested in covering Student Launch events should contact Taylor Goodwin at 938-210-2891.
      Winners will be announced June 9 during a virtual awards ceremony once all teams’ flight data has been verified.
      Seventy-one teams participated this year; 47 teams are expected to launch in-person. Teams not traveling to Alabama are allowed to conduct final test flights at a qualified launch field near them.
      Schedule of Events:
      Rocket Fair: Friday, May 2, 2025, 3-6 p.m. at the Von Braun Center East Hall.
      A free event for the public to view rockets and meet the student teams.
      Launch Day: Saturday, May 3, 2025, gates open at 7 a.m. and the event runs from 8:30 a.m.-2:30 p.m. (or until last rocket launch) at Bragg Farms, in Toney, Alabama. This is a free public event with live rocket launches. Please be weather aware. Lawn chairs are recommended. Pets are not permitted.
      Back-up Launch Day: Sunday, May 4, 2025, is reserved as a back-up launch day in case of inclement weather. If needed, the event will run from 8:30 a.m. to 2:30 p.m. (or until last rocket launches) at Bragg Farms.
      About the Competition
      Student Launch provides relevant, cost-effective research and development of rocket propulsion systems and reflects the goals of NASA’s Artemis Program, which will establish the first long-term presence on the Moon and pave the way for eventual Mars missions.
      Each year, the payload component changes to reflect current NASA missions. As Student Launch celebrates its 25th anniversary, the payload challenge will include “reports” from STEMnauts, non-living objects representing astronauts. The STEMnaut “crew” must relay real-time data to the student team’s mission control, just as the Artemis astronaut crew will do as they explore the lunar surface.  
      Eligible teams compete for prizes and awards and are scored in nearly a dozen categories including safety, vehicle design, social media presence, and science, technology, engineering, and math (STEM) engagement.
      Marshall’s Office of STEM Engagement hosts Student Launch to encourage students to pursue careers in STEM through real-world experiences. Student Launch is a part of the agency’s Artemis Student Challenges– a variety of activities exposing students to the knowledge and technology required to achieve the goals of the Artemis missions.
      In addition to the NASA Office of STEM Engagement’s Next Gen STEM project, NASA Space Operations Mission Directorate, Northrup Grumman, National Space Club Huntsville, American Institute of Aeronautics and Astronautics, National Association of Rocketry, Relativity Space and Bastion Technologies provide funding and leadership for the competition.
      For more information about Student Launch, please visit:
      https://www.nasa.gov/learning-resources/nasa-student-launch/
      Taylor Goodwin 
      NASA’s Marshall Space Flight Center, Huntsville, Alabama
      256-544-0034
      taylor.goodwin@nasa.gov
      Facebook logo @NASAStudentLaunch @StudentLaunch Instagram logo @NASA_Marshall Share
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      5 Min Read NASA 3D Wind Measuring Laser Aims to Improve Forecasts from Air, Space
      3D wind measurements from NASA's Aerosol Wind Profiler instrument flying on board a specially mounted aircraft along the East Coast of the U.S. and across the Great Lakes region on Oct. 15, 2024. Credits: NASA/Scientific Visualization Studio Since last fall, NASA scientists have flown an advanced 3D Doppler wind lidar instrument across the United States to collect nearly 100 hours of data — including a flight through a hurricane. The goal? To demonstrate the unique capability of the Aerosol Wind Profiler (AWP) instrument to gather extremely precise measurements of wind direction, wind speed, and aerosol concentration – all crucial elements for accurate weather forecasting.
      Weather phenomena like severe thunderstorms and hurricanes develop rapidly, so improving predictions requires more accurate wind observations.
      “There is a lack of global wind measurements above Earth’s surface,” explained Kris Bedka, the AWP principal investigator at NASA’s Langley Research Center in Hampton, Virginia. “Winds are measured by commercial aircraft as they fly to their destinations and by weather balloons launched up to twice per day from just 1,300 sites across the globe. From space, winds are estimated by tracking cloud and water vapor movement from satellite images.”
      However, in areas without clouds or where water vapor patterns cannot be easily tracked, there are typically no reliable wind measurements. The AWP instrument seeks to fill these gaps with detailed 3D wind profiles.
      The AWP instrument (foreground) and HALO instrument (background) was integrated onto the floorboard of NASA’s G-III aircraft. Kris Bedka, project principal investigator, sitting in the rear of the plane, monitored the data during a flight on Sept. 26, 2024. NASA/Maurice Cross Mounted to an aircraft with viewing ports underneath it, AWP emits 200 laser energy pulses per second that scatter and reflect off aerosol particles — such as pollution, dust, smoke, sea salt, and clouds — in the air. Aerosol and cloud particle movement causes the laser pulse wavelength to change, a concept known as the Doppler effect.
      The AWP instrument sends these pulses in two directions, oriented 90 degrees apart from each other. Combined, they create a 3D profile of wind vectors, representing both wind speed and direction.
      We are measuring winds at different altitudes in the atmosphere simultaneously with extremely high detail and accuracy.
      Kris bedka
      NASA Research Physical Scientist
      “The Aerosol Wind Profiler is able to measure wind speed and direction, but not just at one given point,” Bedka said. “Instead, we are measuring winds at different altitudes in the atmosphere simultaneously with extremely high detail and accuracy.”
      Vectors help researchers and meteorologists understand the weather, so AWP’s measurements could significantly advance weather modeling and forecasting. For this reason, the instrument was chosen to be part of the National Oceanic and Atmospheric Administration’s (NOAA) Joint Venture Program, which seeks data from new technologies that can fill gaps in current weather forecasting systems. NASA’s Weather Program also saw mutual benefit in NOAA’s investments and provided additional support to increase the return on investment for both agencies.
      On board NASA’s Gulfstream III (G-III) aircraft, AWP was paired with the agency’s High-Altitude Lidar Observatory (HALO) that measures water vapor, aerosols, and cloud properties through a combined differential absorption and high spectral resolution lidar.
      Working together for the first time, AWP measured winds, HALO collected water vapor and aerosol data, and NOAA dropsondes (small instruments dropped from a tube in the bottom of the aircraft) gathered temperature, water vapor, and wind data.
      The AWP and HALO instrument teams observing incoming data on board NASA’s G-III aircraft over Tennessee while heading south to observe Hurricane Helene. Sept. 26, 2024. NASA/Maurice Cross “With our instrument package on board small, affordable-to-operate aircraft, we have a very powerful capability,” said Bedka. “The combination of AWP and HALO is NASA’s next-generation airborne weather remote sensing package, which we hope to also fly aboard satellites to benefit everyone across the globe.”
      The combination of AWP and HALO is NASA's next-generation airborne weather remote sensing package.
      kris bedka
      NASA Research Physical Scientist
      The animation below, based on AWP data, shows the complexity and structure of aerosol layers present in the atmosphere. Current prediction models do not accurately simulate how aerosols are organized throughout the breadth of the atmosphere, said Bedka.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      This visualization shows AWP 3D measurements gathered on Oct. 15, 2024, as NASA’s G-III aircraft flew along the East Coast of the U.S. and across the Great Lakes region. Laser light that returns to AWP as backscatter from aerosol particles and clouds allows for measurement of wind direction, speed, and aerosol concentration as seen in the separation of data layers. NASA/Scientific Visualization Studio “When we took off on this particular day, I thought that we would be finding a clear atmosphere with little to no aerosol return because we were flying into what was the first real blast of cool Canadian air of the fall,” described Bedka. “What we found was quite the opposite: an aerosol-rich environment which provided excellent signal to accurately measure winds.” 
      During the Joint Venture flights, Hurricane Helene was making landfall in Florida. The AWP crew of two pilots and five science team members quickly created a flight plan to gather wind measurements along the outer bands of the severe storm.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      This video shows monitors tracking the AWP science team’s location in the western outer bands of Hurricane Helene off the coast of Florida with views outside of the aircraft looking at turbulent storm clouds on Sept. 26, 2024. NASA/Kris Bedka “A 3D wind profile can significantly improve weather forecasts, particularly for storms and hurricanes,” said Harshesh Patel, NOAA’s acting Joint Venture Program manager. “NASA Langley specializes in the development of coherent Doppler wind lidar technology and this AWP concept has potential to provide better performance for NOAA’s needs.”
      The flight plan of NASA’s G-III aircraft – outfitted with the Aerosol Wind Profiler – as it gathered data across the Southeastern U.S. and flew through portions of Hurricane Helene on Sept. 26, 2024. The flight plan is overlaid atop a NOAA Geostationary Operational Environmental Satellite-16 (GOES) satellite image from that day. NASA/John Cooney The flights of the AWP lidar are serving as a proving ground for possible integration into a future satellite mission.
      “The need to improve global 3D wind models requires a space-based platform,” added Patel. “Instruments like AWP have specific space-based applications that potentially align with NOAA’s mission to provide critical data for improving weather forecasting.”
      A view of the outer bands of Hurricane Helene off the coast of Florida during NASA’s science flights demonstrating the Aerosol Wind Profiler instrument on Sept. 26, 2024.NASA/Maurice Cross After the NOAA flights, AWP and HALO were sent to central California for the Westcoast & Heartland Hyperspectral Microwave Sensor Intensive Experiment  and the Active Passive profiling Experiment, which was supported by NASA’s Planetary Boundary Layer Decadal Survey Incubation Program and NASA Weather Programs. These missions studied atmospheric processes within the planetary boundary layer, the lowest part of the atmosphere, that drives the weather conditions we experience on the ground. 
      To learn more about lidar instruments at NASA visit:
      NASA Langley Research Center: Generations of Lidar Expertise
      About the Author
      Charles G. Hatfield
      Science Public Affairs Officer, NASA Langley Research Center
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