The general mission of the Halocarbons and other Atmospheric Trace Species group is to quantify the distributions and magnitudes of the sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds. HATS utilizes numerous types of platforms, including ground-based stations, towers, ocean vessels, aircraft, and balloons, to accomplish its mission. For a detailed mission statement, click on the "FAQ" button.


  • Airborne - Projects involve measuring important trace gases in the upper troposphere and stratosphere on aircraft and balloons, and even Unpiloted Airborne Vehicles (UAVs). The key result is the understanding the chemistry and transport of the upper atmosphere.
  • Flasks - Research centers on obtaining the maximum science from weekly to monthly flasks samples collected worldwide and analyzed in our Boulder labs. These samples are used to determine current and historical trends, trace gas and OH distributions, and budgets.
  • Instrumentation - Custom state-of-the-air instrumentation for measuring greenhouse gases, halocarbons, substitute halocarbons, and hydrocarbons is offered for unique platforms. Instrumentation was provided for some developing countries to monitor their trace gases.
  • In Situ Sustainable Measurements - In situ observations at NOAA/ESRL baseline observatories, WMO GAW stations, Niwot Ridge, and tower sites located in Harvard Forest, Wisconsin, and Texas provide information on transport, emissions, and trends with the highest possible time resolution.
  • Ocean - The oceans play an important role as sources and sinks for atmospheric trace species. The determination of fluxes between the surface seawater and the marine air require knowledge of the saturation anomaly with air and the gas exchange rate.
  • Standards - Research is conducted for developing and maintaining standard gas mixtures of atmospheric gases to calibrate instrumentation on the many platforms used in our studies. Custom standards provided as primary or secondary calibration mixtures are available.