The HITRAN molecular spectroscopic database: edition of 2000 including updates through 2001

Rothman, Laurence S.; Barbe, A.; Benner, D. Chris; Brown, Linda R.; Camy‐Peyret, C.; Carleer, Michel; Chance, K.; Clerbaux, Cathy; Dana, V.; Devi, V. Malathy; Fayt, André; Flaud, J.‐M.; Gamache, Robert R.; Goldman, A.; Jacquemart, D.; Jucks, K. W.; Lafferty, W. J.; Mandin, J.-Y.; Massie, Steven T.; Nemtchinov, V.; Newnham, David; Perrin, A.; Rinsland, C. P.; Schroeder, Jessica; Smith, Kevin M.; Smith, Mary Ann H.; Tang, Kuilian; Toth, R. A.; Auwera, J. Vander; Varanasi, P.; Yoshino, K.

doi:10.1016/s0022-4073(03)00146-8

Cited by 1,153 publications

(728 citation statements)

References 164 publications

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“…The filters are carefully selected to match pre-determined specifications for optimal sensing of SO 2 gas and particles. Figure 3 shows the line intensities from the HITRAN-2000 database (Rothman, 2003) illustrating the main absorption features of SO 2 in the region 6.8-10 µm.…”

Section: Filteringmentioning

confidence: 99%

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

Prata

Bernardo

2014

Atmos. Meas. Tech.

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Abstract. Recent advances in uncooled detector technology now offer the possibility of using relatively inexpensive thermal (7 to 14 µm) imaging devices as tools for studying and quantifying the behaviour of hazardous gases and particulates in atmospheric plumes. An experimental fast-sampling (60 Hz) ground-based uncooled thermal imager (Cyclops), operating with four spectral channels at central wavelengths of 8.6, 10, 11 and 12 µm and one broadband channel (7-14 µm) has been tested at several volcanoes and at an industrial site, where SO 2 was a major constituent of the plumes. This paper presents new algorithms, which include atmospheric corrections to the data and better calibrations to show that SO 2 slant column density can be reliably detected and quantified. Our results indicate that it is relatively easy to identify and discriminate SO 2 in plumes, but more challenging to quantify the column densities. A full description of the retrieval algorithms, illustrative results and a detailed error analysis are provided. The noise-equivalent temperature difference (NE T ) of the spectral channels, a fundamental measure of the quality of the measurements, lies between 0.4 and 0.8 K, resulting in slant column density errors of 20 %. Frame averaging and improved NE T 's can reduce this error to less than 10 %, making a stand-off, day or night operation of an instrument of this type very practical for both monitoring industrial SO 2 emissions and for SO 2 column densities and emission measurements at active volcanoes. The imaging camera system may also be used to study thermal radiation from meteorological clouds and the atmosphere.

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Section: Filteringmentioning

confidence: 99%

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

Prata

Bernardo

2014

Atmos. Meas. Tech.

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“…The latter are taken from: NO 2 (Voigt et al, 2002), Glyoxal (CHOCHO) (Volkamer et al, 2005), O 3 (Voigt et al, 2001), O 4 (Greenblatt et al, 1990) and H 2 O (Hitran 2006, see Rothman et al, 2003). For the non-linear optimization DOASIS uses a Levenberg-Marquard fit and b-splines for interpolation.…”

Section: Experimental Setup and Retrieval Proceduresmentioning

confidence: 99%

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

et al. 2012

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Abstract. In this study we present the first long term measurements of atmospheric nitrogen dioxide (NO 2 ) using a LED based Long Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument. This instrument is measuring continuously in Hong Kong since December 2009, first in a setup with a 550 m absorption path and then with a 3820 m path at about 30 m to 50 m above street level. The instrument is using a high power blue light LED with peak intensity at 450 nm coupled into the telescope using a Y-fibre bundle. The LP-DOAS instrument measures NO 2 levels in the Kowloon Tong and Mongkok district of Hong Kong and we compare the measurement results to mixing ratios reported by monitoring stations operated by the Hong Kong Environmental Protection Department in that area. Hourly averages of coinciding measurements are in reasonable agreement (R = 0.74). Furthermore, we used the long-term data set to validate the Ozone Monitoring Instrument (OMI) NO 2 data product. Monthly averaged LP-DOAS and OMI measurements correlate well (R = 0.84) when comparing the data for the OMI overpass time. We analyzed weekly patterns in both data sets and found that the LP-DOAS detects a clear weekly cycle with a reduction on weekends during rush hour peaks, whereas OMI is not able to observe this weekly cycle due to its fix overpass time (13:30-14:30 LT -local time).

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“…The calculations are based upon the HITRAN spectral line data [Rothman et al, 2003] and CKD2.4 water vapor continuum absorption formulation [Tobin et al, 1999]. Temperature and water vapor follow the standard tropical profiles [McClatchey et al, 1972].…”

Section: Longwave Radiative Transfer Formulationmentioning

confidence: 99%

Effect of the temperature dependence of gas absorption in climate feedback

Huang

Ramaswamy

2007

J. Geophys. Res.

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[1] In the context of climate feedback associated with temperature change, there exist two potential mechanisms that affect the outgoing longwave radiation (OLR) and the downward longwave radiation (DLR). One is the ''Planck'' effect that determines the blackbody thermal emission at a considered temperature. The other is the ''absorptivity'' effect, in which a temperature change causes a change in gas absorptivities and thus influences the longwave radiative transfer. By using the line-by-line computed radiative Jacobians, which quantify the sensitivity of the radiative fluxes to a perturbation in the atmospheric temperature, the absorptivity effect is separated from the Planck effect. The absorptivity effect is further partitioned into components, with each one having a distinct physical meaning. It is demonstrated that the absorptivity-induced changes in the longwave radiation are individually significant even though the net effect is largely one of cancellation. As a consequence, the Planck effect dominates the overall OLR and DLR sensitivities to temperature change. The absorptivity effect tends to counteract the Planck effect. This tendency is particularly significant for the DLR and is more prominent for a warmer climate, with the result being a reduction in the surface warming.Citation: Huang, Y., and V. Ramaswamy (2007), Effect of the temperature dependence of gas absorption in climate feedback,

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The HITRAN molecular spectroscopic database: edition of 2000 including updates through 2001

Cited by 1,153 publications

References 164 publications

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

Effect of the temperature dependence of gas absorption in climate feedback

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The HITRAN molecular spectroscopic database: edition of 2000 including updates through 2001

Cited by 1,153 publications

References 164 publications

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

Retrieval of sulfur dioxide from a ground-based thermal infrared imaging camera

NO&lt;sub&gt;2&lt;/sub&gt; measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

Effect of the temperature dependence of gas absorption in climate feedback

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Product

Resources

About

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy