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Showing 25 to 36 of 3866 entries
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Investigation of ultrahigh-performance liquid chromatography/travelling-wave ion mobility/time-of-flight mass spectrometry for fast profiling of fatty acids in the high Arctic sea surface microlayer.

Rapid communications in mass spectrometry : RCM

Mashayekhy Rad F, Leck C, Ilag LL, Nilsson U.
PMID: 29520903
Rapid Commun Mass Spectrom. 2018 Jun 30;32(12):942-950. doi: 10.1002/rcm.8109.

RATIONALE: Fatty acids are enriched in the ocean surface microlayer (SML) and have as a consequence been detected worldwide in sea spray aerosols. In searching for a relationship between the properties of the atmospheric aerosol and its ability to...

Identification of chemical compositions and sources of atmospheric aerosols in Xi'an, inland China during two types of haze events.

The Science of the total environment

Li J, Wang G, Ren Y, Wang J, Wu C, Han Y, Zhang L, Cheng C, Meng J.
PMID: 27220100
Sci Total Environ. 2016 Oct 01;566:230-237. doi: 10.1016/j.scitotenv.2016.05.057. Epub 2016 May 21.

High time resolution (1h) of TSP filter samples was collected in Xi'an in inland China from December 5 to 13, 2012, during which a 9-day long of haze episode occurred. The hazy days were classified as two types, i.e.,...

Efficient transport of tropospheric aerosol into the stratosphere via the Asian summer monsoon anticyclone.

Proceedings of the National Academy of Sciences of the United States of America

Yu P, Rosenlof KH, Liu S, Telg H, Thornberry TD, Rollins AW, Portmann RW, Bai Z, Ray EA, Duan Y, Pan LL, Toon OB, Bian J, Gao RS.
PMID: 28630285
Proc Natl Acad Sci U S A. 2017 Jul 03;114(27):6972-6977. doi: 10.1073/pnas.1701170114. Epub 2017 Jun 19.

An enhanced aerosol layer near the tropopause over Asia during the June-September period of the Asian summer monsoon (ASM) was recently identified using satellite observations. Its sources and climate impact are presently not well-characterized. To improve understanding of this...

Laser-Induced Breakdown Spectroscopy Analysis of Lead Aerosol in Nitrogen and Air Atmosphere.

Applied spectroscopy

Redoglio DA, Palazzo N, Migliorini F, Dondè R, De Iuliis S.
PMID: 29082749
Appl Spectrosc. 2018 Apr;72(4):584-590. doi: 10.1177/0003702817742314. Epub 2017 Nov 28.

In this work, laser-induced breakdown spectroscopy (LIBS) is applied for quantitative measurements of Pb in aerosols. In order to investigate the carrier gas role and, in particular, the effect of O

Comprehensive chemical comparison of fuel composition and aerosol particles emitted from a ship diesel engine by gas chromatography atmospheric pressure chemical ionisation ultra-high resolution mass spectrometry with improved data processing routines.

European journal of mass spectrometry (Chichester, England)

Rüger CP, Schwemer T, Sklorz M, O'Connor PB, Barrow MP, Zimmermann R.
PMID: 28657450
Eur J Mass Spectrom (Chichester). 2017 Feb;23(1):28-39. doi: 10.1177/1469066717694286. Epub 2017 Jan 01.

The analysis of petrochemical materials and particulate matter originating from combustion sources remains a challenging task for instrumental analytical techniques. A detailed chemical characterisation is essential for addressing health and environmental effects. Sophisticated instrumentation, such as mass spectrometry coupled...

Photochemistry of glyoxylate embedded in sodium chloride clusters, a laboratory model for tropospheric sea-salt aerosols.

Physical chemistry chemical physics : PCCP

Bersenkowitsch NK, Ončák M, van der Linde C, Herburger A, Beyer MK.
PMID: 29517776
Phys Chem Chem Phys. 2018 Mar 28;20(12):8143-8151. doi: 10.1039/c8cp00399h. Epub 2018 Mar 08.

Although marine aerosols undergo extensive photochemical processing in the troposphere, a molecular level understanding of the elementary steps involved in these complex reaction sequences is still missing. As a defined laboratory model system, the photodissociation of sea salt clusters...

Atlantic hurricane surge response to geoengineering.

Proceedings of the National Academy of Sciences of the United States of America

Moore JC, Grinsted A, Guo X, Yu X, Jevrejeva S, Rinke A, Cui X, Kravitz B, Lenton A, Watanabe S, Ji D.
PMID: 26504210
Proc Natl Acad Sci U S A. 2015 Nov 10;112(45):13794-9. doi: 10.1073/pnas.1510530112. Epub 2015 Oct 26.

Devastating floods due to Atlantic hurricanes are relatively rare events. However, the frequency of the most intense storms is likely to increase with rises in sea surface temperatures. Geoengineering by stratospheric sulfate aerosol injection cools the tropics relative to...

Benchmarking ab initio binding energies of hydrogen-bonded molecular clusters based on FTIR spectroscopy.

The journal of physical chemistry. A

Bork N, Du L, Reiman H, Kurtén T, Kjaergaard HG.
PMID: 24988143
J Phys Chem A. 2014 Jul 17;118(28):5316-22. doi: 10.1021/jp5037537. Epub 2014 Jul 02.

Models of formation and growth of atmospheric aerosols are highly dependent on accurate cluster binding energies. These are most often calculated by ab initio electronic structure methods but remain associated with significant uncertainties. We present a computational benchmarking study...

Tropospheric haze and colors of the clear daytime sky.

Applied optics

Lee RL.
PMID: 25967831
Appl Opt. 2015 Feb 01;54(4):B232-40. doi: 10.1364/AO.54.00B232.

To casual observers, haze's visible effects on clear daytime skies may seem mundane: significant scattering by tropospheric aerosols visibly (1) reduces the luminance contrast of distant objects and (2) desaturates sky blueness. However, few published measurements of hazy-sky spectra...

Large enhancement in the heterogeneous oxidation rate of organic aerosols by hydroxyl radicals in the presence of nitric oxide.

The journal of physical chemistry letters

Richards-Henderson NK, Goldstein AH, Wilson KR.
PMID: 26505970
J Phys Chem Lett. 2015 Nov 19;6(22):4451-5. doi: 10.1021/acs.jpclett.5b02121. Epub 2015 Oct 29.

In the troposphere, the heterogeneous lifetime of an organic molecule in an aerosol exposed to hydroxyl radicals (OH) is thought to be weeks, which is orders of magnitude slower than the analogous gas phase reactions (hours). Here, we report...

Performance of a fire detector based on a compact laser spectroscopic carbon monoxide sensor.

Optics express

Hangauer A, Chen J, Strzoda R, Fleischer M, Amann MC.
PMID: 24921562
Opt Express. 2014 Jun 02;22(11):13680-90. doi: 10.1364/OE.22.013680.

In this paper we show the suitability of a miniaturized tunable diode laser spectroscopy (TDLS)-based carbon-monoxide (CO) sensor for fire detection applications. The sensor utilizes a vertical-cavity surface-emitting laser (VCSEL) and inherent calibration scheme with reference gas filled in...

Effects of mixing states on the multiple-scattering properties of soot aerosols.

Optics express

Cheng T, Wu Y, Gu X, Chen H.
PMID: 25969118
Opt Express. 2015 Apr 20;23(8):10808-21. doi: 10.1364/OE.23.010808.

The radiative properties of soot aerosols are highly sensitive to the mixing states of black carbon particles and other aerosol components. Light absorption properties are enhanced by the mixing state of soot aerosols. Quantification of the effects of mixing...

Showing 25 to 36 of 3866 entries