Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Topic: Carbon dioxide

NOAA's Mauna Loa Baseline Atmospheric Observatory sits at 11,140 feet, on top of Hawaii's tallest volcano, which enables scientists to collect air samples free of local pollutants.

Carbon dioxide levels rose at record pace for 2nd straight year

March 10, 2017

Focus areas:

Topics:

NOAA's Mauna Loa Baseline Atmospheric Observatory sits at 11,140 feet, on top of Hawaii's tallest volcano, which enables scientists to collect air samples free of local pollutants.

Measurements taken by NOAA scientists show carbon dioxide levels are now permanently above 400 parts per million — even at the South Pole, which is the last place on Earth to register the impacts of increasing emissions from fossil fuel consumption. This photo shows NOAA's South Pole Observatory in the distance.

Carbon dioxide levels race past troubling milestone

September 30, 2016

Focus areas:

Topics:

greenhouse gases

Measurements taken by NOAA scientists show carbon dioxide levels are now permanently above 400 parts per million — even at the South Pole, which is the last place on Earth to register the impacts of increasing emissions from fossil fuel consumption. This photo shows NOAA's South Pole Observatory in the distance.

Welcome to noaa.gov

Carbon Dioxide at NOAA’s Mauna Loa Observatory reaches new milestone: Tops 400 ppm

May 10, 2013

Focus areas:

Topics:

Welcome to noaa.gov

Redoubt Volcano viewed from the northwest following the April 4, 2009 eruption. Steam rises from the summit crater, pyroclastic flow and surge deposits drape the flanks, and lahar deposits cover the Drift River Valley. Credit: R. G. McGimsey, USGS.

Which emits more carbon dioxide: Volcanoes or human activities?

June 21, 2016

Focus areas:

Topics:

Redoubt Volcano viewed from the northwest following the April 4, 2009 eruption. Steam rises from the summit crater, pyroclastic flow and surge deposits drape the flanks, and lahar deposits cover the Drift River Valley. Credit: R. G. McGimsey, USGS.

Fossil fuel extraction in North Dakota's Bakken field in 2014.

Warming due to carbon dioxide jumped by half in 25 years

May 18, 2016

Focus areas:

Topics:

greenhouse gases

Fossil fuel extraction in North Dakota's Bakken field in 2014.

Rising levels of acidity in the ocean and growing areas of low-oxygen waters are a “double whammy” threat for fishing industries, ecosystems and economies along the U.S. West Coast.

West Coast prepares for ‘double whammy’ threat to ocean health

April 4, 2016

Focus areas:

Topics:

ocean acidification

Rising levels of acidity in the ocean and growing areas of low-oxygen waters are a “double whammy” threat for fishing industries, ecosystems and economies along the U.S. West Coast.

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.

American Chemical Society honors measurement set at NOAA observatory

April 23, 2015

Focus areas:

Topics:

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.

Subscribe to carbon dioxide