Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Radiatively Important Trace Species (RITS) Measurements
ESRL GMD HATS RITS
The Halocarbons and other Atmospheric Trace Species (HATS) group aims to quantify the atmospheric burden, and the distributions and magnitudes of sources and sinks for nitrous oxide and other halogen containing compounds. They utilize numerous types of platforms, including ground-based stations, towers, ships, aircraft, and balloons to accomplish their mission. HATS measures chlorofluorocarbons (CFCs) at measurement sites spanning the globe. CFCs are non-toxic, non-flammable chemicals that contain carbon, chlorine, and fluorine atoms. CFCs were used as solvents, refrigerants, and aerosol sprays. While inert in the troposphere, they decompose in the stratosphere to release chlorine for destructive reactions with ozone. This process eventually led to the creation of the "Ozone Hole" over the Antarctic. Monitoring the amounts of CFCs and other trace gases is important, both for tracking the growth and recovery of the Ozone Hole, and because many upward trending trace gases are potent and durable greenhouse gases.
Original in-situ sampling electron capture gas chromatographs ("RITS"): The Radiatively Important Trace Species (RITS) program consisted of five stand-alone systems that were used to make in-situ measurements at Barrow, AK (BRW), Mauna Loa, HI (MLO), American Samoa (SMO), South Pole, Antarctica (SPO), and Niwot Ridge, CO (NWR) from 1983 until 2001 when the last of the systems was retired. The RITS systems were replaced by the next-generation CATS systems that have remained operational since then. The RITS systems measured nitrous oxide (N2O), the chlorofluorocarbons CFC-12 (CCl2F2), CFC-11 (CCl3F), and CFC-113 (CCl2F-CClF2, although quality measurements of this gas have been nullified by the lack of stable references during the RITS period), methyl chloroform (CH3CCl3), and carbon tetrachloride (CCl4) once per hour.
Through the Big Earth Data Initiative (BEDI), ESRL/GMD has taken their data collection and converted files into NetCDF-4, a self-describing format.
Original in-situ sampling electron capture gas chromatographs ("RITS"): The Radiatively Important Trace Species (RITS) program consisted of five stand-alone systems that were used to make in-situ measurements at Barrow, AK (BRW), Mauna Loa, HI (MLO), American Samoa (SMO), South Pole, Antarctica (SPO), and Niwot Ridge, CO (NWR) from 1983 until 2001 when the last of the systems was retired. The RITS systems were replaced by the next-generation CATS systems that have remained operational since then. The RITS systems measured nitrous oxide (N2O), the chlorofluorocarbons CFC-12 (CCl2F2), CFC-11 (CCl3F), and CFC-113 (CCl2F-CClF2, although quality measurements of this gas have been nullified by the lack of stable references during the RITS period), methyl chloroform (CH3CCl3), and carbon tetrachloride (CCl4) once per hour.
Through the Big Earth Data Initiative (BEDI), ESRL/GMD has taken their data collection and converted files into NetCDF-4, a self-describing format.
Dataset Citation
- Cite as: Elkins, James W.; Nance, David, Bradley Hall, and NOAA ESRL (2017): Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Radiatively Important Trace Species (RITS) Measurements, Version 1. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V51N7ZDK [access date].
Dataset Identifiers
- doi:10.7289/V51N7ZDK
- NCEI DSI 3269_01
- gov.noaa.ncdc:C01555
ISO 19115-2 Metadata
gov.noaa.ncdc:C01555
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset collaborator | Geoffrey Dutton Professional Research Assistant DOC/NOAA/ESRL/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce (303) 497-6086 geoff.dutton@noaa.gov |
Time Period | 1987-08-01 to 2001-08-31 (time interval: 1-hour) |
Spatial Bounding Box Coordinates |
West: -180.0
East: 180.0
South: -90.0
North: 90.0
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Edition | Version 1 |
Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | The general mission of the Halocarbons and other Atmospheric Trace Species group is to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds. |
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Global Change Master Directory (GCMD) Science Keywords
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Global Change Master Directory (GCMD) Data Center Keywords
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Global Change Master Directory (GCMD) Instrument Keywords
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Global Change Master Directory (GCMD) Project Keywords
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Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
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Lineage Statement | Raw data were collected at field sites, transferred to NOAA where initial processing was performed. Quality control and processing were conducted on a desktop computer. |
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Processing Environment | Initial peak integration of chromatograms was conducted on HP digital integration machines or workstations. Quality control and mixing ratios were calculated via custom software on HP workstations. |
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Last Modified: 2023-06-23
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov