Global Monitoring Division
  • Mauna Loa
    Mauna Loa, Hawaii
  • MLO CO2
    Mauna Loa CO2
  • Barrow, Alaska
    Barrow, Alaska
  • American Samoa
    American Samoa
  • Water Vapor Balloon Flight
    Picture from Water Vapor balloon flight, 20km altitude
  • Solar Transmisison
    Mauna Loa Apparent Solar Transmission
  • Hats data
    Global Means of various Halogenated compounds
  • Surface Radiation
    Surface Radiation Measurement Instruments near Penn State
  • Trinidad Head
    Trinidad Head, California
  • South Pole Ozone
    South Pole Ozone Hole Profile
  • South Pole
    The Atmospheric Research Observatory at South Pole
  • Summit
    Summit, Greenland
  • Carbontracker
    CO2 Weather computed by Carbontracker Model
Climate ESRL's Global Monitoring Division conducts sustained observations and research related to global distributions, trends, sources and sinks of atmospheric constituents that are capable of forcing change in the climate of the Earth. This research will advance climate projections and provide scientific policy-relevant, decision support information to enhance society's ability to plan and respond.
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Ozone ESRL's Global Monitoring Division conducts research on the depletion of the global stratospheric ozone layer and Antarctic ozone hole through global surface-based monitoring of total-column ozone, ultraviolet radiation, and ozone-depleting gases, including those regulated by the Montreal Protocol. Continued surveillance is necessary in order to verify the expected recovery of the ozone layer.
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Air Quality ESRL's Global Monitoring Division monitors levels of air quality elements such as tropospheric ozone, carbon monoxide and aerosol particles in non-source regions which may be affected by long range transport from distant sources of industrial pollution. This large-scale transport affects baseline air quality which must be monitored in order to determine the importance of regional sources that may impact the environment and public health.
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The 43rd Global Monitoring Annual Conference will be held May 19-20, 2015 at the David Skaggs Research Center (DSRC), 325 Broadway, Boulder, Colorado.

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News and Highlights

Scientists probe methane mystery in Four Corners
April 7, 2015

Scientists probe methane mystery in Four Corners

A team of scientific investigators is now in the Four Corners region of the U.S. Southwest, an area where the states of Arizona, New Mexico, Colorado and Utah meet at one point, aiming to uncover reasons for a mysterious methane hotspot detected from space by a European satellite. The joint project is working to solve the mystery from the air, on the ground, and with mobile laboratories.
MLO Science Fair Awards
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.
Antarctic ozone hole similar to last year
October 30, 2014

Antarctic ozone hole similar to last year

The Antarctic ozone hole, which forms annually in the August to October period, reached its peak size on September 11, stretching to 9.3 million square miles (24.1 million square kilometers), roughly the same size as last year’s peak of 9.3 million square miles (24 million square kilometers) on September 16, 2013. This is an area similar in size to North America.
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Research Groups

  • Global Greenhouse Gas Reference Network

    The GGGRN makes measurements of the spatial and temporal distributions of greenhouse gases and provides essential constraints to our understanding of the global carbon cycle.
  • Halocarbons and other Trace Species

    The HATS group quantifies the distributions and magnitudes of the sources and sinks for important ozone-depleting and greenhouse gases.
  • Aerosols

    The goals of this program are to characterize means, variability, and trends of climate-forcing properties of different types of aerosols.
  • Solar and Infrared Radiation

    Activities involve empirical and theoretical research of the Earth's surface radiation budget.
  • Ozone and Water Vapor

    Research on the nature and causes of the depletion of the stratospheric ozone layer and the role of ozone and water vapor in forcing climate change.
  • Observatory Operations

    NOAA/ESRL operates staffed atmospheric baseline observatories from which numerous in situ and remote atmospheric and solar measurements are conducted.

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