Laser Remote Sensing of Sulfur Dioxide, Nitrogen Dioxide, Toluene, Ozone, and Dust in the Industrial Area of Cubatão (Brazil)

Weitkamp, C.; Goers, Uta-Barbara; Glauer, J.; Köhler, Sundolf; Rairoux, P.; Immler, Franz; Wöste, L.; Ulbricht, Matthias; Weidauer, Derk

doi:10.1007/978-3-642-60612-0_99

Cited by 2 publications

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“…Numerous other techniques have been used in the atmosphere or suggested as new approachestunable infrared diode laser absorption spectroscopy (TDLAS) has demonstrated a capability for in situ detection at 400−700 ppt/10 s with approximately 100-m path lengths. − Detection limits using a visible diode laser and 1-m path lengths have reached 5000 ppt/10 s, while others remain orders of magnitude higher. , Long-path differential absorption has been used to detect atmospheric NO 2 with a sensitivity of 250 ppt/10 s using a 20.6-km folded path length , and its relative, differential absorption LIDAR, have detection limits near 2 × 10 5 ppt for NO 2 , limiting their current use to studies near the combustion sources of NO x . Magnetic rotation spectroscopy has been used in the laboratory to achieve a detection limit of 6000 ppt/10 s. , The above techniques are all spectroscopically specific to NO 2 .…”

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Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

1999

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We describe a time-gated laser-induced fluorescence instrument designed for accurate (+/- 5%, 1 sigma), continuous, autonomous, in situ observations of NO2 with the sensitivity (15 ppt/10 s at S/N = 2) and portability necessary to study NO2 anywhere in the troposphere. The technique is advantageous because it is spectroscopically specific and direct in that it does not require conversion of NO2 into another species (e.g., NO) prior to detection, eliminating a class of potential interferences. Performance of the instrument is illustrated with 15 weeks (July-Oct 1998) of observations at the University of California, Blodgett Forest field station located in the foothills of the Sierra Nevada and 4 weeks (June 15-July 15, 1999) in Nashville, TN during the Southern Oxidants Study. Ambient concentrations of NO2 at Blodgett Forest varied from below 50 ppt to 4000 ppt and NO2 ranged from 5 to 50% of the total reactive nitrogen; while in Nashville, TN, concentrations ranged from 1 to 75 ppb.

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Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

1999

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<title>Lidar measurements of atmospheric constituents</title>

Weitkamp

1996

SPIE Proceedings

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The advent of depth-resolving, remote measurement techniques for the determination of atmospheric constituents added a new dimension to the investigation of atmospheric phenomena. In the present paper optical, or lidar, techniques suited for this purpose are reviewed. After a presentation of the processes used and the algorithms necessary to extract the interesting information from the optical return signals, a few considerations about the necessary instrumentation are presented. For iilustration, one example is shown of results obtained with elastic backscatter, differential absorption and scattering, Raman lidar, and Raman DIAL. Of the numerous new developments in actual progress, one example, BELINDA, has been chosen that in a way marks the borderline between elastic backscatter and differential absorption lidar.

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Laser Remote Sensing of Sulfur Dioxide, Nitrogen Dioxide, Toluene, Ozone, and Dust in the Industrial Area of Cubatão (Brazil)

Cited by 2 publications

References 2 publications

Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

<title>Lidar measurements of atmospheric constituents</title>

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Laser Remote Sensing of Sulfur Dioxide, Nitrogen Dioxide, Toluene, Ozone, and Dust in the Industrial Area of Cubatão (Brazil)

Cited by 2 publications

References 2 publications

Atmospheric NO2: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

Atmospheric NO2: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

<title>Lidar measurements of atmospheric constituents</title>

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Product

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Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios

Atmospheric NO₂: In Situ Laser-Induced Fluorescence Detection at Parts per Trillion Mixing Ratios