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Description

This dataset provides calculated age of air (AoA) and the argon/nitrogen (Ar/N2) ratio (per meg) from stratospheric flask samples and simultaneous high-frequency measurements of nitrous oxide (N2O), carbon dioxide (CO2), ozone (O3), methane (CH4), and carbon monoxide (CO) compiled from three airborne projects. The trace gases were used to identify 235 flask samples with stratospheric influence collected by the Medusa Whole Air Sampler and to calculate AoA using a new N2O-AoA relationship developed using a Markov Chain Monte Carlo algorithm. The data span a wide range of latitudes poleward of 40 degrees in both the Northern and Southern Hemispheres and cover the period 2009-01-10 to 2018-05-21.

Product Summary

Platforms
MODELS,
NASA DC-8,
NSF/NCAR GV HIAPER
Instruments
Computer,
FLASKS
Spatial Extent
N: 84.53 S: -84.51 E: 178.68 W: -179.58
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2009-01-10 to 2018-05-21
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
c2676992776-ornl_cloud
Data State
COMPLETE
Processing Level
3
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Birner, B., Chipperfield, M., Morgan, E. J., & Keeling, R. F. (2020). ATom: Age of Air, ArN2 Ratio, and Trace Gases in Stratospheric Samples, 2009-2018 (Version 1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1788 Date Accessed: 2025-07-19

Documents

GENERAL DOCUMENTATION Age of Air, Ar/N2, and Trace Gases in the Lowermost Stratosphere: ATom_HIPPO_ORCAS.pdf
USER'S GUIDE ORNL DAAC Data Set Documentation

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