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Aerosol Measurements With A High Resolution Spectrometer
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Book Synopsis Aerosol Measurements with a High Resolution Spectrometer by : Frank K. Dearborn
Download or read book Aerosol Measurements with a High Resolution Spectrometer written by Frank K. Dearborn and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A short-history of the development and design of the AFGL/Epsilon Labs balloon-borne aerosol particle spectrometer is presented. Measurement results for a majority of the flights conducted with this instrument are summarized and presented in a compatible graphic format to facilitate intercomparison. An improved method of computing air flow and a means of correcting erroneous air flow data is described which should permit the re-evaluation and corrections of early flight data. Application of the foregoing corrective methods to the most recent flight data is detailed. Some pecularities in this high resolution data are described and a tentative explanation is proposed. (Author).
Book Synopsis Aerosol Measurements with a High Resolution Spectrometer by : Frank K. Dearborn
Download or read book Aerosol Measurements with a High Resolution Spectrometer written by Frank K. Dearborn and published by . This book was released on 1982 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Measurements of Tropospheric Aerosol Scattering Properties by an Airborne High Spectral Resolution Lidar by : Jeffery Thomas Sroga
Download or read book Remote Measurements of Tropospheric Aerosol Scattering Properties by an Airborne High Spectral Resolution Lidar written by Jeffery Thomas Sroga and published by . This book was released on 1983 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerosol Measurement by : Pramod Kulkarni
Download or read book Aerosol Measurement written by Pramod Kulkarni and published by John Wiley & Sons. This book was released on 2011-09-09 with total page 1497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosol Measurement: Principles, Techniques, and Applications Third Edition is the most detailed treatment available of the latest aerosol measurement methods. Drawing on the know-how of numerous expert contributors; it provides a solid grasp of measurement fundamentals and practices a wide variety of aerosol applications. This new edition is updated to address new and developing applications of aerosol measurement, including applications in environmental health, atmospheric science, climate change, air pollution, public health, nanotechnology, particle and powder technology, pharmaceutical research and development, clean room technology (integrated circuit manufacture), and nuclear waste management.
Book Synopsis Aerosol processes in the Planetary Boundary Layer: High resolution Aerosol Mass Spectrometry on a Zeppelin NT Airship by : Florian Rubach
Download or read book Aerosol processes in the Planetary Boundary Layer: High resolution Aerosol Mass Spectrometry on a Zeppelin NT Airship written by Florian Rubach and published by Forschungszentrum Jülich. This book was released on 2014-03-24 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Developments in IN SITU Size Spectrum Measurement of Submicron Aerosols by : RB. Husar
Download or read book Recent Developments in IN SITU Size Spectrum Measurement of Submicron Aerosols written by RB. Husar and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports the recent developments for in situ atmospheric aerosol size spectrometry in the diameter range below a few microns. Such particles are responsible for most of the visibility reduction and believed to be most dangerous to the human health. The use of optical single particle counters for aerosol size spectrometry is reviewed, and the main factors in counter design and aerosol characteristics affecting their performance are discussed. The paper reports the main characteristics of a modified Climet Instruments, Inc. counter, intended primarily for high size resolution atmospheric aerosol measurement in the 0.25 to 3.0 μm particle diameter range. Its main feature is an ellipsoid mirror scattered light collector. The design, operation, calibration, and size resolution of the University of Minnesota's Electrical Aerosol Analyzer is discussed. The instrument is capable of measuring aerosol size spectra in situ in the diameter range from about 0.004 to 0.5 μm with its size resolution being best at about 0.01 μm. A simple device, the diffusion battery can be used for rough size distribution measurement in the range 0.002 to 0.1 μm. Its principle of operation, design, and use is discussed.
Book Synopsis Application of the HSRL Model II to Measurements of the Aerosol Backscatter Phase Function and Cross Section by : Christian John Grund
Download or read book Application of the HSRL Model II to Measurements of the Aerosol Backscatter Phase Function and Cross Section written by Christian John Grund and published by . This book was released on 1984 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Molecular Characterization of Biogenic Secondary Organic Aerosol by High-resolution Time-of-flight Mass Spectrometry by : Felipe Daniel Lopez-Hilfiker
Download or read book A Molecular Characterization of Biogenic Secondary Organic Aerosol by High-resolution Time-of-flight Mass Spectrometry written by Felipe Daniel Lopez-Hilfiker and published by . This book was released on 2015 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The guiding question to this research is: To what extent and by what mechanisms do biogenic volatile organic compounds contribute to atmospheric aerosol mass? To address this question we need to understand the chemistry that produces condensable vapors which when in the presence of particles may partition onto the aerosol surface depending on their chemical and physical properties. I developed an insitu gas and aerosol sampling system, the FIGAERO (Filter Inlet for Gases and AEROsol) to speciate gas and particle phase organics derived from photochemical reactions with biogenic volatile organic compounds under both field and laboratory conditions. By coupling the FIGAERO to a High-Resolution Time-of-Flight Chemical Ionization Mass Spectrometer (HR-TOF-CIMS) I am able to elucidate chemical pathways by identifying elemental compositions and in some cases functional groups present in the detected molecular ions. The coupling of the FIGAERO to the HR-TOF-CIMS also allows the estimation of effective vapor pressures of the aerosol components and this information can be used to improve vapor pressure models and test associated partitioning theories and parameterizations. The approach also provides hundreds of speciated chemical tracers that can be correlated with traditional environmental and chemical measurements (e.g AMS, NOx, SO2, SMPS, VOC) to help derive sources and sinks and to constrain the mechanisms responsible for the formation and growth of organic aerosol. Measurements obtained across a wide range of conditions and locations allowing connections and contrasts between different chemical systems, providing insights into generally controlling factors of secondary organic aerosol (SOA) and its properties.
Book Synopsis Fundamentals and Applications in Aerosol Spectroscopy by : Ruth Signorell
Download or read book Fundamentals and Applications in Aerosol Spectroscopy written by Ruth Signorell and published by CRC Press. This book was released on 2010-12-20 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helping you better understand the processes, instruments, and methods of aerosol spectroscopy, Fundamentals and Applications in Aerosol Spectroscopy provides an overview of the state of the art in this rapidly developing field. It covers fundamental aspects of aerosol spectroscopy, applications to atmospherically and astronomically relevant problem
Book Synopsis Aerosol Measurements by : Wayne Alexander Cassatt
Download or read book Aerosol Measurements written by Wayne Alexander Cassatt and published by . This book was released on 1974 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interpretation of Mass Spectra by : Fred Warren McLafferty (Chemiker, USA)
Download or read book Interpretation of Mass Spectra written by Fred Warren McLafferty (Chemiker, USA) and published by . This book was released on 1973 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-flight Aerosol Mass Spectrometer by : Kennedy-Kiet Tuan Vu
Download or read book Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-flight Aerosol Mass Spectrometer written by Kennedy-Kiet Tuan Vu and published by . This book was released on 2016 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overarching objectives of both of these field campaigns is to gain a better understanding of the chemical and physical characteristics of atmospheric aerosols formed from different sources that are responsible for the reduction in the overall air quality. Advanced understanding of aerosol characteristics and the relationships with precursor sources is essential for determining effective emission control strategies to improve air quality.
Book Synopsis Using Mass Spectrometry and Ftir to Characterize Atmospherically-relevant Particles Generated in Laboratory Systems by : Emily Anne Bruns
Download or read book Using Mass Spectrometry and Ftir to Characterize Atmospherically-relevant Particles Generated in Laboratory Systems written by Emily Anne Bruns and published by . This book was released on 2011 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric aerosols are known to have multifaceted effects on human health, visibility and climate. To understand these effects, characterization of aerosol properties is necessary. This dissertation focuses on several specific topics with the overall goal of improving our understanding of aerosols in the atmosphere. One area of importance is particulate organic nitrates, which are known to be ubiquitous in the atmosphere; however, there is a lack of proven analytical techniques for their measurement. The qualitative and quantitative response of a high resolution time of flight aerosol mass spectrometer to particulate organic nitrates was studied by analyzing secondary organic aerosol (SOA) from NO3 radical reactions with [Alpha]- and [Beta]-pinene, 3-carene, limonene, and isoprene. Extensive fragmentation of the organic nitrate products was observed in the mass spectra, which precluded molecular speciation. Another area of interest is the recent development of a number of ambient ionization techniques, which are promising for aerosol characterization. One such technique, atmospheric solids analysis probe mass spectrometry (ASAP-MS), was applied for the first time to the identification of organics in SOA, which was generated in the laboratory from the ozonolysis of & alpha;-pinene and isoprene, and from the NO3 oxidation of & alpha;-pinene. Also, ambient samples were collected from a forested and a suburban location. ASAP-MS data for the laboratory-generated samples showed peaks corresponding to well-known products of these reactions, and higher molecular weight oligomers were present in all samples. This is consistent with previously published studies of similar systems and shows that ASAP-MS should have wide applicability in both laboratory and field studies. Vapor pressures of low volatility compounds are important parameters in several atmospheric processes, including the formation of new particles and the partitioning of compounds between the gas-phase and particles. However, vapor pressures of low volatility compounds are challenging to measure and reported values vary significantly, illustrating the need for new approaches. ASAP-MS was applied for the first time to the measurement of vapor pressures and heats of sublimation. The measured heats of sublimation were in good agreement with published values. The vapor pressures were typically within a factor of three of published values made at similar temperatures. This study establishes that ASAP-MS is a promising new technique for vapor pressure and heat of sublimation measurements of low volatility compounds. To further understand new particle formation, laboratory and field measurements were made to identify gas-phase amines, which could play a role in new particle formation, from previously unknown sources using proton transfer reaction mass spectrometry. The work presented in this dissertation advances our understanding of aerosols and explores novel methods for their characterization.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781724043085 Total Pages :38 pages Book Rating :4.0/5 (43 download)
Book Synopsis High Resolution Spectroscopy to Support Atmospheric Measurements by : National Aeronautics and Space Adm Nasa
Download or read book High Resolution Spectroscopy to Support Atmospheric Measurements written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-26 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major research activities performed during the cooperative agreement enhanced our spectroscopic knowledge of molecules of atmospheric interest such as carbon dioxide, water vapor, ozone, methane, and carbon monoxide, to name a few. Measurements were made using the NASA Langley Tunable Diode Laser Spectrometer System (TDL) and several Fourier Transform Spectrometer Systems (FTS) around the globe. The results from these studies made remarkable improvements in the line positions and intensities for several molecules, particularly ozone and carbon dioxide in the 2 to 17-micrometer spectral region. Measurements of pressure broadening and pressure induced line shift coefficients and the temperature dependence of pressure broadening and pressure induced line shift coefficients for infrared transitions of ozone, methane, and water vapor were also performed. Results from these studies have been used for retrievals of stratospheric gas concentration profiles from data collected by several Upper Atmospheric Research satellite (UARS) infrared instruments as well as in the analysis of high resolution atmospheric spectra such as those acquired by space-based, ground-based, and various balloon-and aircraft-borne experiments. Our results made significant contributions in several updates of the HITRAN (HIgh resolution TRANsmission) spectral line parameters database. This database enjoys worldwide recognition in research involving diversified scientific fields. Benner, D. Chris and Venkataraman, Malathy Devi Langley Research Center
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Earth Observer written by and published by . This book was released on 2015 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
