NCAR/ACOM FTIR Atmospheric Composition Dataset

The NCAR/ACOM Optical Techniques Project operates three high spectral resolution, solar viewing FTIR instruments at Thule, Greenland (76.5ºN, 291.3ºE, 225 masl), Boulder Colorado (40.03ºN, 254.7ºE, 1612 masl) and Mauna Loa Observatory Hawaii (19.5ºN, 204.4ºE, 3396 masl). These instruments operate within the framework of the Network for the Detection of Atmospheric Composition change (NDACC). The raw data are recorded autonomously and downloaded to ACOM servers daily. They are processed at ACOM and produce vertical profiles of several trace atmospheric constituents: O3, HNO3, HCl, HF, CO, N2O, CH4, HCN, C2H6, OCS, H2CO, H2O and ClONO2. These data constitute a long-term reference dataset for tropospheric and stratospheric chemistry investigations.

The data, along with metadata and full error analysis are saved to GEOMS conforming HDF files. Per our agreement with NDACC and our sponsor NASA, they are uploaded bi-yearly to the NDACC data handling facility (DHF) at www.ndacc.org. For select species, HDF files are uploaded on a near-real-time basis for the CAMS27 project which use the data for realtime air quality forecasting. Once these data are uploaded they are publicly available. The NDACC has implemented Creative Commons licensing designations for data at the DHF. These data maintain a CC0 license.

DOI

https://doi.org/10.5065/wwxr-tp19

Temporal Range

1995-08-01 to 2020-12-31

Related Links

Quick Look at Current Data Data Listing by Species NCAR/ACOM Optical Techniques NDACC NDACC Infrared Working Group Tropospheric water vapor profiles obtained with FTIR: comparison with balloon-borne frost point hygrometers and influence on trace gas retrievals - Ortega, I., Buchholz, R. R., Hall, E. G., Hurst, D. F., Jordan, A. F., and Hannigan, J. W. (2019). Atmospheric Measurement Techniques, 12(2):873– 890. Semiautonomous FTS Observation System for Remote Sensing of Stratospheric and Tropospheric Gases - Hannigan, J. W., Coffey, M. T., and Goldman, A. (2009). Journal of Atmospheric and Oceanic Technology, 26:1814–1828.

GCMD Science Keywords

• Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds
• Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens
• Atmosphere > Atmospheric Chemistry > Nitrogen Compounds
• Atmosphere > Atmospheric Chemistry > Oxygen Compounds
• Atmosphere > Atmospheric Chemistry > Sulfur Compounds
• Atmosphere > Atmospheric Chemistry > Trace Gases/Trace Species
• Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Stable Isotopes

GCMD Platform Types

• Land-Based Platforms > Field Sites > Data Collections
• Land-Based Platforms > Permanent Land Sites > Esrl Stations > Noaa Earth Science Research Laboratory Stations

GCMD Instruments

• Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Spectrometers > Ftir Spectrometer > Fourier Transform Infrared Spectrometer

File Media Types

• application/x-hdf

Support Contact

James W. Hannigan
UCAR/NCAR - Atmospheric Chemistry Observations and Modeling Laboratory
jamesw@ucar.edu

Data Curator

GDEX Curator
UCAR/NCAR - GDEX
datahelp@ucar.edu

Legal Constraints

Creative Commons Attribution 4.0 International License.

Access Constraints

None

Full Metadata

DIF XML
ISO19139 XML
OAI DC
JSON-LD

Version History

2.0

1.0