# Browse Abstracts & Presentations - 2021 International Symposium on Molecular Spectroscopy by Subject "Atmospheric science"

• (International Symposium on Molecular Spectroscopy, 2021-06-24)
The Great Oxygenation Event, the introduction of O$_{2}$ into the Earth’s atmosphere approximately 2.5 billion years ago, is a critical stage in the development of life on Earth. The exact timing of this event is thought ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
New particle formation (NPF) plays a crucial role in the formation of secondary aerosol particles, which in turn actively influence the climate radiative forcing balance. The magnitude of this impact is currently unclear, ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
The accuracy of atmospheric trace gas retrievals depends directly on the accuracy of the molecular absorption model used within the retrieval algorithm. For remote sensing of well-mixed gases, such as carbon dioxide (CO$_2$), ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
Several experimental studies have shown that 1,4-hydroxycarbonyls can undergo sequential reactions involving cyclization followed by dehydration to form dihydrofurans.\footnote{Atkinson, R. et al. Atmos. Environ. 2008, 42, ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
\begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.2]{Fig_nu4.eps} \end{wrapfigure} Silicon tetrafluoride (SiF$_4$) should be a normal trace component of volcanic gases. However, a better knowledge of spectroscopic ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
The fundamentals of XH stretching modes typically lie in the 2,500 – 3,700 cm$^{-1}$ (2.7 - 4.0 $\mu$m) range. Continuous-wave optical parametric oscillators (CW OPOs) enable high-resolution spectroscopy in this region. A ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
We used two previously described [1,2] cavity ring-down spectroscopy systems to accurately measure line intensities in the following three $^{12}$C$^{16}$O$_{2}$ rovibrational bands near 1.6 $\mu$m: (30012) $\leftarrow$ ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
Greenhouse gases were monitored on an open-path over kilometer length with calibrated wavelength modulation spectroscopy (WMS). A movable platform was developed capable of detecting atmospheric variations of the concentrations ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
Ozonolysis of alkenes is an important oxidation pathway of alkenes in the troposphere because it is involved in the production of organic aerosol and OH radicals. The mechanism of ozonolysis of alkenes involves the formation ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
Vegetation is a major source of emission of Biogenic Volatile Organic Compounds (BVOCs), which play an important role in atmospheric chemistry. Apart from methane and isoprene, monoterpenes (\chem{C_{10}H_{16}}) are emitted ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
We present measurements of molecular transition frequencies based on the comb-locked cavity ring-down spectroscopy technique [1], reporting vacuum transition frequencies of Doppler-broadened $^{12}$C$^{16}$O$_{2}$ in the ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-25)
For the first time, THz spectroscopy was used for a direct monitoring of molecular species in the Dunkirk atmospheric simulation chamber called CHARME for Chamber for the Atmospheric Reactivity and the Metrology of the ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
The \~{B} - \~{X} laser-induced fluorescence (LIF) and dispersed fluorescence (DF) spectra of the atmospherically important $\beta$-monofluoro ethoxy (MFEO), $\beta$,$\beta$-difluoro ethoxy (DFEO), and $\beta$,$\beta$,$\ ... application/pdf PDF (20kB) • (International Symposium on Molecular Spectroscopy, 2021-06-24) Isoprene (C$_{5}$H$_{8}$) is an important molecular target in trace gas sensing due to its presence in Earth's atmosphere and human breath. Isoprene is the most abundant of the so-called biogenic volatile organic compounds ... application/pdf PDF (18kB) • (International Symposium on Molecular Spectroscopy, 2021-06-24) The version 4.0 dataset from the Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) on SCISAT, released in March of 2019, has sulfur dioxide (SO$_{2}$) volume mixing ratio (VMR) profiles as a routine ... application/pdf PDF (18kB) • (International Symposium on Molecular Spectroscopy, 2021-06-25) New particle formation is a process in which trace vapors in the atmosphere cluster and grow into larger particles. Recently, we have employed a multi-trap gas-phase ion preparation technique and cryogenic ion vibrational ... application/pdf PDF (13kB) • (International Symposium on Molecular Spectroscopy, 2021-06-24) The pure rotational spectrum of 2-chloroethyl radical, CH$_{2}$ClCH$_{2}\$, has been observed for the first time using a cavity-based Fourier-transform microwave spectrometer in the frequency region of 10 GHz – 34 GHz. The ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
After almost 18 years in low-Earth orbit, the ACE satellite is making near-real time measurements of numerous trace gases, thin clouds, aerosols and temperature by solar occultation. The primary instrument is a high-resolution ...

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• (International Symposium on Molecular Spectroscopy, 2021-06-24)
Absorption of solar radiation by water vapor in the near-UV region is a poorly-understood but important issue in atmospheric science. To better understand water vapor near-UV absorption, we constructed a cavity ring-down ...

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