INTENSITY STUDIES OF OZONE IN THE 10 MICRON REGION BY SIMULTANEOUS SUB-MM/LASER-BASED INFRARED DIRECT ABSORPTION MEASUREMENTS

Nemchick, Deacon J

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https://hdl.handle.net/2142/122511 Copy

Description

Title

INTENSITY STUDIES OF OZONE IN THE 10 MICRON REGION BY SIMULTANEOUS SUB-MM/LASER-BASED INFRARED DIRECT ABSORPTION MEASUREMENTS

Author(s)

Nemchick, Deacon J

Contributor(s)

• Drouin, Brian
• Crawford, Timothy J.
• Sung, Keeyoon
• Zhang, Xu

Issue Date

2023-06-21

Keyword(s)

Linelists

Abstract

Ozone is a common retrieval target from a variety of remote sensing platforms owing to both its importance in tro- pospheric and stratospheric chemical processes and readily accessible observation grade absorption/emission bands in the THz, infrared, visible, and ultraviolet. Refinement of the ν₃ band line intensities in the 10 micron region has been the target of many spectroscopic studies in the past decades with uncertainty claims now approaching the 1% level. These studies typically constrain experimental ozone number density using UV cross section measurements while simultane- ously performing Fourier transform or laser-based measurements in the infrared. This talk will summarize ongoing efforts to perform dual band measurements using a mode-hop-free quantum cascade laser in the infrared that instead derives ozone partial pressures from simultaneously collected direct absorption spectra in the sub-millimeter (500-600 GHz) region. This alternative approach, which serves as the first sub-millimeter/laser-based infrared attempt to determine ozone intensities, is unique in that infrared intensities are ultimately anchored to dipole measurements accurate to the 0.1% level. A brief overview of previous ozone studies will be provided along with a detailed description of the experiment configuration and preliminary results.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122511

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