Data · dataset · 2026
Ground-based direct-sun DOAS and airborne MAX-DOAS measurements of the collision-induced oxygen complex, OâOâ, absorption with significant pressure and temperature differences
Listed in National Center for Atmospheric Research
The collision-induced Oâ complex, OâOâ, is a very important trace gas for understanding remote sensing measurements of aerosols, cloud properties and atmospheric trace gases.
Description
Many ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of the OâOâ optical depth require correction factors of 0.75 ± 0.1 to reproduce radiative transfer modeling (RTM) results for a nearly pure Rayleigh atmosphere.
One of the potential causes of this discrepancy is uncertainty in laboratory-measured OâOâ absorption cross section temperature and pressure dependencies due to difficulties in replicating atmospheric conditions in the laboratory environment. This paper presents ground-based direct-sun (DS) and airborne multi-axis (AMAX) DOAS measurements of OâOâ absorption optical depths under actual atmospheric conditions in two wavelength regions (335--390 and 435--490 nm).
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DS irradiance measurements were made by the Washington State University research-grade Multi-Function Differential Spectroscopy Instrument instrument from 2007 to 2014 at seven sites with significant pressure (778 to 1013 hPa) and OâOâ profile-weighted temperature (247 to 275 K) differences. Aircraft MAX-DOAS measurements were conducted by the University of Colorado (CU) AMAX-DOAS instrument on 29 January 2012 over the Southern Hemispheric subtropical Pacific Ocean.
Scattered solar radiance spectra were collected at altitudes between 9 and 13.2 km, with OâOâ profile-weighted temperatures of 231 to 244 K and nearly pure Rayleigh scattering conditions. Due to the well-defined DS air-mass factors during ground-based measurements and extensively characterized atmospheric conditions during the aircraft AMAX-DOAS measurements, OâOâ "pseudo" absorption cross sections, Ï, are derived from the observed optical depths and estimated OâOâ column densities.
Vertical OâOâ columns are calculated from the atmospheric sounding temperature, pressure and specific humidity profiles.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d7jw8g1b ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/ground-based-direct-sun-doas-and-airborne-max-doas-mea… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=bccdc8e5-6dbf-4bce-817d-efb2cd225… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Satellite remote sensing 65%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | bccdc8e5-6dbf-4bce-817d-efb2cd2258b6 | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · data ucar edu | keyword-concept-rules@1.0.0 | title+description (65%) |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |