June 4, 2020
Rise of carbon dioxide unabated
Seasonal peak reaches 417 parts per million at Mauna Loa observatory
June 4, 2019
Carbon dioxide levels hit record peak in May
Atmospheric carbon dioxide continued its rapid rise in 2019, with the average for May peaking at 414.7 parts per million at NOAA’s Mauna Loa Atmospheric Baseline Observatory, scientists from NOAA and Scripps Institution of Oceanography at the University of California San Diego announced today.
March 22, 2019
Global carbon dioxide growth in 2018 reached 4th highest on record
By the end of 2018, NOAA’s atmospheric observatory at Mauna Loa recorded the fourth-highest annual growth in the concentration of atmospheric carbon dioxide (CO2) in 60 years of record-keeping.
June 7, 2018
Another climate milestone on Mauna Loa
Carbon dioxide levels measured at NOAA’s Mauna Loa Atmospheric Baseline Observatory averaged more than 410 parts per million in April and May, the highest monthly averages ever recorded, scientists from NOAA and Scripps Institution of Oceanography at the University of California San Diego announced today.
March 13, 2017
Carbon dioxide levels rose at record pace for 2nd straight year
Carbon dioxide levels measured at NOAA’s Mauna Loa Baseline Atmospheric Observatory rose by 3 parts per million to 405.1 parts per million (ppm) in 2016, an increase that matched the record jump observed in 2015.
August 2, 2016
2015 State of the Climate: Carbon Dioxide
Using measurements taken worldwide, scientists estimated that 2015’s global average carbon dioxide concentration was 399.4 parts per million (ppm), a new record high. At Mauna Loa Observatory in Hawai’i, where atmospheric carbon dioxide has been recorded longer than anywhere else in the world, the annual average carbon dioxide concentration was 400.8—also a new record, and a new milestone.
June 21, 2016
MLO Science Fair Awards
Every year MLO contributes to the local Science Fair event. This year Samantha Yamamoto & Maile Birlhante won the junior research award with their project 'Light Dispersing'. Kendra Puleo won the second award with 'Ocean acidification effect on the food chain.' Kylan K. Sakata won the senior division award with 'Verifying special relativity over time dilation through moon decay at variable altitudes' and Moana Lily Pinner won the second award with 'Investigating the SPF, anti-oxidant and anti cancer potential of turmeric and ginger.'
March 10, 2016
Record annual increase of carbon dioxide observed at Mauna Loa for 2015
The annual growth rate of atmospheric carbon dioxide measured at NOAA’s Mauna Loa Observatory in Hawaii jumped by 3.05 parts per million during 2015, the largest year-to-year increase in 56 years of research.
April 23, 2015
American Chemical Society honors measurement set at NOAA observatory
The American Chemical Society designated the Keeling Curve – a long-term record of rising carbon dioxide in the planet’s atmosphere -- as a National Historic Chemical Landmark in a ceremony April 30 at NOAA’s Mauna Loa Observatory in Hawaii.
February 24, 2015
MLO Science Fair Awards
Every year the Mauna Loa Obervatory contributes to the local Science Fair event. This year, Halia Buchal won the junior research award with the project titled: Purple or Green? Does Leaf Color Affect How Plants Respond to Different Colors of Light? The Senior research recipent Keanu D. Pinner won the senior division award with the project titled: Activation of the Hepatocyte Antioxidant Response by Kava Secondary Metabolites.
July 13, 2014
2013 State of the Climate: Carbon dioxide tops 400 ppm
On May 9, 2013, the daily average concentration of carbon dioxide (CO2) in the atmosphere surpassed 400 parts per million (ppm) for the first time at the Mauna Loa Observatory in Hawaii, where the modern record of observations began back in 1958. Other Northern Hemisphere sites also reported CO2 concentrations exceeding 400 ppm in 2013. By summer, the high concentrations at these sites had dropped as vegetation began taking up carbon dioxide for photosynthesis.
July 8, 2014
Greenhouse gases top 400 ppm for three months in a row at Mauna Loa
For the first time since carbon dioxide in the atmosphere has been measured, the levels of this greenhouse gas at Mauna Loa, Hawaii, have been above 400 parts per million every single day for three straight months.
March 21, 2014
Heat-trapping gas concentrations top 400 ppm, two months earlier than last year
Over the last five days beginning on March 16, 2014, carbon dioxide levels have surpassed 400 parts per million at NOAA's Mauna Loa Observatory in Hawaii. This is nearly two months earlier than last year when the concentration of this greenhouse gas was first recorded above 400 parts per million on May 9, at the historic NOAA observatory.
May 10, 2013
Carbon Dioxide at NOAA's Mauna Loa Observatory reaches new milestone: Tops 400 ppm
On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million (ppm) for the first time since measurements began in 1958.