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greenhouse gases

Mauna Loa sunset.

May 23, 2022

May 23, 2022

Greenhouse gas pollution trapped 49% more heat in 2021 than in 1990

greenhouse gases

NOAA's Mauna Loa observatory, set high on the barren slopes of a volcano in the middle of the Pacific Ocean, is ideally situated to sample air that has not been influenced by local pollution sources or vegetation.

Increase in atmospheric methane set another record during 2021

April 7, 2022

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greenhouse gases

NOAA's Mauna Loa observatory, set high on the barren slopes of a volcano in the middle of the Pacific Ocean, is ideally situated to sample air that has not been influenced by local pollution sources or vegetation.

Atmospheric carbon dioxide measured at NOAA’s Mauna Loa Atmospheric Baseline Observatory peaked for 2021 in May at a monthly average of 419 parts per million (ppm), the highest level since accurate measurements began 63 years ago, according to scientists from NOAA and Scripps Institution of Oceanography at the University of California San Diego. (2019 photo of observatory grounds, Big Island, Hawaii.)

Carbon dioxide peak in May breaks another record

June 7, 2021

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greenhouse gases

measurements and observations

Atmospheric carbon dioxide measured at NOAA’s Mauna Loa Atmospheric Baseline Observatory peaked for 2021 in May at a monthly average of 419 parts per million (ppm), the highest level since accurate measurements began 63 years ago, according to scientists from NOAA and Scripps Institution of Oceanography at the University of California San Diego. (2019 photo of observatory grounds, Big Island, Hawaii.)

Alaska Air 737-9 flies over Mt. Rainier

NOAA and Boeing to use airliner to sample greenhouse gases from atmosphere

June 3, 2021

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greenhouse gases

Alaska Air 737-9 flies over Mt. Rainier

NOAA's Mauna Loa observatory is a premier research facility that has continuously monitored and collected atmospheric data since the 1950s. This photo, taken in 2019, shows the observatory on its perch at 11,000 feet elevation on Hawaii's tallest mountain, which enables sampling of "background" air that is free of local pollution.

Carbon dioxide levels now higher than at any time in the past 3.6 million years

April 7, 2021

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greenhouse gases

NOAA's Mauna Loa observatory is a premier research facility that has continuously monitored and collected atmospheric data since the 1950s. This photo, taken in 2019, shows the observatory on its perch at 11,000 feet elevation on Hawaii's tallest mountain, which enables sampling of "background" air that is free of local pollution.

This image shows the ozone concentration over Antarctica for the week of September 14–20, 2020. Experts define the "ozone hole" as the area in which ozone levels are below 220 Dobson Units (dark blue, marked with black triangle on the color bar).

Emissions of banned ozone-depleting gas are back on the decline

February 10, 2021

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greenhouse gases

This image shows the ozone concentration over Antarctica for the week of September 14–20, 2020. Experts define the "ozone hole" as the area in which ozone levels are below 220 Dobson Units (dark blue, marked with black triangle on the color bar).

Air pollution in the form of brown smog envelops downtown Los Angeles, California. 2015.

Warming influence of greenhouse gases continues to rise

May 28, 2020

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greenhouse gases

Air pollution in the form of brown smog envelops downtown Los Angeles, California. 2015.

A NOAA Twin Otter aircraft fitted with data-collecting instruments approaches New York City from over the Hudson River during an airborne research mission in 2018.

Airborne research finds East Coast cities emit twice as much methane as estimated

July 22, 2019

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greenhouse gases

climate science

A NOAA Twin Otter aircraft fitted with data-collecting instruments approaches New York City from over the Hudson River during an airborne research mission in 2018.

Mauna Loa sunset.

Rising emissions drive Annual Greenhouse Gas Index increase in 2018

May 21, 2019

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greenhouse gases

Mauna Loa sunset.

Mauna Loa Observatory is a premier atmospheric research facility that has been continuously monitoring and collecting data related to atmospheric change since the 1950's.

Global carbon dioxide growth in 2018 reached 4th highest on record

March 22, 2019

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greenhouse gases

Mauna Loa Observatory is a premier atmospheric research facility that has been continuously monitoring and collecting data related to atmospheric change since the 1950's.

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