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Instrument

HAL
Harvard Halogens Instrument

The Harvard Halogens Instrument (HAL) is an in situ airborne fluorescence analyzer developed by Harvard University. It uses chemical titration-resonance fluorescence to detect chlorine monoxide (ClO) and thermal dissociation-chemical titration-resonance fluorescence to detect chlorine nitrate (ClONO2). HAL operates at the 118.9 nm wavelength and reports data every 35 seconds. It measures ClO and ClONO2 mixing ratios with a precision of 3 pptv and 10 pptv, respectively.

NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Instrument Details

Meter/Analyzer
Earth Science > Atmosphere > Atmospheric Chemistry
Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens
Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorine Monoxide
Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorine Nitrate
Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Bromine Monoxide
Troposphere
35 s
Point
2521.4 THz
Currently unavailble
  • David Wilmouth

  • David Wilmouth

  • Harvard University

  • Currently unavailable

  • Currently unavailable

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10.5067/ASDC/DCOTSS-Aircraft-Data_1External Link