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ACE-1: NSF/NCAR C-130 OH, H2SO4, MSA Measurements


This dataset consists of measurements of OH, H2SO4, and MSA made from the C-130 aircraft during ACE-1. This dataset differs from the preliminary one in several ways. First, the calibration for OH was changed. Previously a value of 5.5 x 10-20 molec/cm2 was used for the H2O absoption cross section at 1849 nm. Recent work however at NCAR and Harvard indicate that the reported value should be higher. A value of 7.2 x 10-20 molec/cm2 was used in this analysis. Secondly, the values presented in the preliminary dataset were calculated using a calibration constant measured at sea-level, where an altitude dependent calibration constant was used in this analysis.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 1.0 (2006-06-12)
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Related projects
Spatial Type point
Frequency < 1 minute
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 1995-11-02 00:00:00
End datetime 1995-12-23 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 80.00, Minimum (South) Latitude: -75.00
Minimum (West) Longitude: 130.00, Maximum (East) Longitude: -104.00

Primary point of contact information

Fred Eisele <>

Additional contact information


Eisele, F., Mauldin, R., NCAR Atmospheric Chemistry Division (ACD). 2006. ACE-1: NSF/NCAR C-130 OH, H2SO4, MSA Measurements. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 15 Jun 2024.

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