Abstract
Chemically reactive atmospheric species play a crucial role in tropospheric processes which affect regional air quality and global climate change. Contrary to long-lived species such as greenhouse gases, interference-free accurate and precise concentration assessments of strongly reactive short-lived species represent a real challenge. In this paper, we report on the recent progress in spectroscopic instrumental developments for monitoring of OH, NO 3, HONO and NO 2 by using modern photonic sources (Quantum Cascade Laser, distributed feedback diode laser, light emitting diode) in conjunction with high-sensitivity spectroscopic measurement techniques such as multi-pass cell based long optical path length absorption spectroscopy, wavelength-modulation enhanced off-axis integrated cavity output spectroscopy, Faraday rotation spectroscopy, incoherent broadband cavity enhanced absorption spectroscopy. The main techniques available for routine atmospheric measurements of OH, NO 3 and HONO are overviewed, in comparison with the emerging modern photonic spectroscopy techniques.
Original language | English (US) |
---|---|
Pages (from-to) | 1300-1316 |
Number of pages | 17 |
Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |
Volume | 113 |
Issue number | 11 |
DOIs | |
State | Published - Jul 1 2012 |
All Science Journal Classification (ASJC) codes
- Radiation
- Atomic and Molecular Physics, and Optics
- Spectroscopy
Keywords
- Absorption spectroscopy
- Distributed feedback (DFB) diode laser
- Hydroxyl free radical (OH)
- Light emitting diode (LED)
- Nitrate radical (NO )
- Nitrogen dioxide (NO )
- Nitrous acid (HONO)
- Quantum cascade laser (QCL)