&lt;title&gt;The HITRAN molecular spectroscopic database and HAWKS (HITRAN atmospheric workstation)&lt;/title&gt;

Rothman, Laurence S.; Rinsland, C. P.; Goldman, A.; Massie, Steven T.; Edwards, D. P.; Flaud, J.‐M.; Perrin, A.; Camy‐Peyret, C.; Dana, V.; Mandin, Y.-Y.; Schroeder, Jessica; Gamache, Robert R.; Wattson, R. B.; Yoshino, K.; Chance, K.; Jucks, K. W.; Brown, Linda R.; Nemtchinov, V.; Varanasi, P.

doi:10.1117/12.327146

Cited by 183 publications

(121 citation statements)

References 34 publications

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“…The idler beam is extracted from the OPO cavity and directly sent into the vacuum chamber with 3 mJ/pulse energies and 0.2 cm 2 spot size area. At these intensities, H 2 O in the 1 01 rotational state has only a 5% probability 65 65 A digital delay generator provides a variable waiting time between the OPO and 193 nm excimer laser and therefore probes predissociation dynamics on time scales ranging from ∼5 ns to 1 μs. The 193 nm UV beam (15 mJ/pulse, ∼0.5 cm 2 area) selectively photolyzes the vibrationally excited H 2 O to make OH radicals, which are subsequently detected by a third LIF laser (303-310 nm, beam energy ∼2.5 mJ), obtained from frequency doubling the output of a dye laser pumped by a frequency doubled YAG laser.…”

Section: Methodsmentioning

confidence: 99%

Overtone vibrational spectroscopy in H2-H2O complexes: A combined high level theoretical ab initio, dynamical and experimental study

Ziemkiewicz

Pluetzer

Nesbitt

et al. 2012

The Journal of Chemical Physics

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First results are reported on overtone (v OH = 2 ← 0) spectroscopy of weakly bound H 2 -H 2 O complexes in a slit supersonic jet, based on a novel combination of (i) vibrationally mediated predissociation of H 2 -H 2 O, followed by (ii) UV photodissociation of the resulting H 2 O, and (iii) UV laser induced fluorescence on the nascent OH radical. In addition, intermolecular dynamical calculations are performed in full 5D on the recent ab initio intermolecular potential of Valiron et al. [J. Chem. Phys. 129, 134306 (2008)] in order to further elucidate the identity of the infrared transitions detected. Excellent agreement is achieved between experimental and theoretical spectral predictions for the most strongly bound van der Waals complex consisting of ortho (I = 1) H 2 and ortho (I = 1) H 2 O (oH 2 -oH 2 O). Specifically, two distinct bands are seen in the oH 2 -oH 2 O spectrum, corresponding to internal rotor states in the upper vibrational manifold of and rotational character. However, none of the three other possible nuclear spin modifications (pH 2 -oH 2 O, pH 2 -pH 2 O, or oH 2 -pH 2 O) are observed above current signal to noise level, which for the pH 2 complexes is argued to arise from displacement by oH 2 in the expansion mixture to preferentially form the more strongly bound species. Direct measurement of oH 2 -oH 2 O vibrational predissociation in the time domain reveals lifetimes of 15(2) ns and <5(2) ns for the and states, respectively. Theoretical calculations permit the results to be interpreted in terms of near resonant energy levels and intermolecular alignment of the H 2 and H 2 O wavefunctions, providing insight into predissociation dynamical pathways from these metastable levels.

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Section: Methodsmentioning

confidence: 99%

Overtone vibrational spectroscopy in H2-H2O complexes: A combined high level theoretical ab initio, dynamical and experimental study

Ziemkiewicz

Pluetzer

Nesbitt

et al. 2012

The Journal of Chemical Physics

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“…Our prior results, used by the IPCC (4), were analytic fits to calculations with a one-dimensional radiative-convective model (17). The present results (Table 1) are based on calculations of adjusted radiative forcing (5), using the SI2000 version of the Goddard Institute for Space Studies three-dimensional climate model (8,13), with the absorption coefficients fit to line-by-line radiative transfer calculations, using current HITRAN (18) (5,6).…”

mentioning

confidence: 99%

Global warming in the twenty-first century: An alternative scenario

Hansen

Sato

Ruedy

et al. 2000

Proc. Natl. Acad. Sci. U.S.A.

921

557

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A common view is that the current global warming rate will continue or accelerate. But we argue that rapid warming in recent decades has been driven mainly by non-CO 2 greenhouse gases (GHGs), such as chlorofluorocarbons, CH 4, and N2O, not by the products of fossil fuel burning, CO 2 and aerosols, the positive and negative climate forcings of which are partially offsetting. The growth rate of non-CO 2 GHGs has declined in the past decade. If sources of CH 4 and O3 precursors were reduced in the future, the change in climate forcing by non-CO 2 GHGs in the next 50 years could be near zero. Combined with a reduction of black carbon emissions and plausible success in slowing CO 2 emissions, this reduction of non-CO 2 GHGs could lead to a decline in the rate of global warming, reducing the danger of dramatic climate change. Such a focus on air pollution has practical benefits that unite the interests of developed and developing countries. However, assessment of ongoing and future climate change requires compositionspecific long-term global monitoring of aerosol properties.climate change ͉ greenhouse gases ͉ aerosols ͉ air pollution

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“…This database contains individual parameters for calculating spectral lines, along with the parameters for the effect of various factors, such as temperature, pressure and the content of other components in the gas mixture, on the shape of the lines. The transmittance of a gas can be calculated as follows [39]:…”

Section: Line-by-line Modellingmentioning

confidence: 99%

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Cięszczyk¹

2014

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. This article presents the problem of determining the gas concentration under conditions of changing temperatures. The solution to this problem is based on spectral measurements using chemometric models. Such problems arise when measuring gases during various industrial processes, mainly the pyrolysis process. Chemometric models are built using synthetic calibration data. Line-by-line and statistical models were applied for spectra modelling. The effect of temperature on extracting the gas concentration from spectra of various resolutions was determined. Next, the global model was built and tested using calibration data for specific temperature ranges. The properties of the linear and nonlinear partial least-squares (PLS) models that were applied to the considered issues were demonstrated. CO and CH4 were used as example gases.

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<title>The HITRAN molecular spectroscopic database and HAWKS (HITRAN atmospheric workstation)</title>

Cited by 183 publications

References 34 publications

Overtone vibrational spectroscopy in H2-H2O complexes: A combined high level theoretical ab initio, dynamical and experimental study

Overtone vibrational spectroscopy in H2-H2O complexes: A combined high level theoretical ab initio, dynamical and experimental study

Global warming in the twenty-first century: An alternative scenario

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

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