Download or read book The Abundance of Atmospheric Nitrous Oxide as Derived from Infrared Spectroscopic Measurements written by Edward Foote Gardner and published by . This book was released on with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Spectroscopic Technique for Continuous Online Monitoring of Oxygen and Site specific Nitrogen Isotopic Composition of Atmospheric Nitrous Oxide written by Eliza Harris and published by . This book was released on 2014 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrous oxide is an important greenhouse gas and ozone-depleting-substance. Its sources are diffuse and poorly characterized, complicating efforts to understand anthropogenic impacts and develop mitigation policies. Online, spectroscopic analysis of N2O isotopic composition can provide continuous measurements at high time resolution, giving new insight into N2O sources, sinks, and chemistry. We present a new preconcentration unit, "Stheno II," coupled to a tunable infrared laser direct absorption spectroscopy (TILDAS) instrument, to measure ambient-level variations in 18O and site-specific 15N N2O isotopic composition at remote sites with a temporal resolution of
Download or read book Spectroscopy of the earth s Atmosphere and interstellar Medium written by K.N. Rao and published by Academic Press. This book was released on 2012-12-02 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy of the Earth's Atmosphere and Interstellar Medium focuses on the characteristics of the electromagnetic spectrum of the Earth's atmosphere in the far-infrared and microwave regions. It discusses the modes of observation in field measurements and reviews the two techniques used in the spectral region. Organized into six chapters, this volume begins with an overview of the effect of water-vapor absorption, followed by a discussion on the two frequently used method for deriving atmospheric parameters from high-resolution infrared atmospheric spectra, namely, the equivalent width (EW) technique and the nonlinear least-square fitting (NLSF). Other chapters consider the mechanisms by which interstellar clouds are formed. In addition, the book explores the composition of interstellar clouds, ion-molecule reactions, and the formation of stars. This book will be useful to anyone involved in, or interested in learning more about the field of atmospheric spectroscopy, including scientists, aeronomers, astronomers, astrophysicists, and students.
Download or read book Measurement of the Infrared Spectra of Nitrous Oxide written by Kenneth Blair Rhodes and published by . This book was released on 1949 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1966 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1966 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Infrared Spectroscopy Investigations Into the Mechanism of Nitrite to nitric Oxide Conversion by Nafion written by Gerardo Castillo Valdes and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrous acid (HONO) is a photochemical source of hydroxyl radical (OH) and nitric oxide (NO) that plays an important role in controlling the atmosphere's oxidative capacity. Measurements of nitrous acid in both field and laboratory settings are important for modeling atmospheric chemistry and studying the mechanisms responsible for its environmental fate. Recently, it was shown that the reaction of HONO on Nafion surfaces produces NO, providing a means to quantify HONO at trace levels using commercially available chemiluminescence NO analyzers. However, the mechanism for this catalytic reaction remains unknown. In this work, we investigate the reaction of nitrite (the conjugate base of HONO) on Nafion surfaces with the goal of obtaining mechanistic insights into the key intermediates responsible for the reduction of nitrite/HONO to NO. Chemiluminescence analysis was used to show that the main gas phase products evolved from the reaction of nitrite with Nafion are HONO, nitrogen dioxide (NO2), and NO. We used Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy to search for evidence of intermediate chemical species responsible for nitrite-to-NO conversion. Although we were unable to identify such intermediates using these methods, our study indicates that nitrite-to-NO conversion does not proceed to completion as is the case for HONO-to-NO conversion in the analogous gas phase system. Results demonstrate that double protonation of nitrite to form nitrosonium (NO+) is a prerequisite for complete conversion to NO on Nafion surfaces.
Download or read book A Spectrometric Determination of the Abundance of Nitrous Oxide in Ground Level Air written by Jørgen Birkeland and published by . This book was released on 1957 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of Nitrous Oxide in the Atmosphere written by Kenneth Albert Brice and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1961 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1961 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ATMOSPHERIC NITROUS OXIDE written by D. R. Bates and published by . This book was released on 1966 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information relating to atmospheric nitrous oxide is reviewed. Measurements by several groups show that the fractional volume abundance f (N2O) is about 2.5 x 10 to the -7th power in the troposphere. Photo dissociation is the most important destruction process. Its effectiveness is reduced by the finiteness of the vertical exchange coefficient which prevents nitrous oxide being transported up through the stratosphere fast enough to keep f (N2O) from decreasing with altitude. To balance the mean loss by photo dissociation there must be a source providing 2 to 3 x 10 to the 9th power N2O molecules / sq. cm sec over the surface of the Earth. The most probable source is microbiological as first suggested by Adel. However the slow homogeneous chemical reaction between ozone and nitrogen is not excluded by the laboratory work reported. (Author).
Download or read book N A P C A Abstract Bulletin written by United States. Environmental Protection Agency and published by . This book was released on 1971 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Technology written by and published by . This book was released on 1975 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Standard Atmosphere written by and published by . This book was released on 1976 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S standard atmosphere written by United States. National Oceanic and Atmospheric Administration and published by . This book was released on 1976 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Standard Atmosphere 1976 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1976 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
