Download or read book Ultraviolet Absorption Cross sections of Photoactive Species of Stratospheric Interest written by D. Gillotay and published by . This book was released on 1990 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Absorption Cross sections of Photoactive Species of Stratosperic Interest written by D. Gillotay and published by . This book was released on 1990 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Absorption Cross sections of Halocarbons of Stratospheric Interest written by Didier Gillotay and published by . This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection Methods Ultraviolet Absorption Cross Sections and Reaction Kinetics of Species of Atmospheric Interest OH HO2 H2O2 and OCS written by John Joseph Lamb and published by . This book was released on 1982 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tropospheric Chemistry of Ozone in the Polar Regions written by H. Niki and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic troposphere (0 to ca. 8 km) plays an important role in environmental concerns for global change. It is a unique chemical reactor influenced by human activity and the Arctic ocean. It is surrounded by industrialized continents that in winter contribute gaseous and particulate pollution (Arctic haze). It is underlain by the flat Arctic ocean from which it is separated by a crack-ridden ice membrane 3 to 4 m thick. Ocean to atmosphere exchange of heat, water vapor and marine biogenic gases influence the composition of the reactor. From September 21 to December 21 to March 21, the region north of the Arctic circle goes from a completely sunlit situation to a completely dark one and then back to light. At the same time the lower troposphere is stably stratified. This hinders vertical mixing. During this light period, surface temperature reaches as low as -40°C. In this environment, chemical reactions involving sunlight are generally much slower than further south. Thus, the abundance of photochemically reactive compounds in the atmosphere can be high prior to polar sunrise. Between complete dark in February and complete light in April, a number of chemical changes in the lower troposphere take place.
Download or read book Ultraviolet Absorption Cross Sections of HONO Vapor written by Luisa T. Molina and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Critical Review of Ultraviolet Photoabsorption Cross Sections for Molecules of Astrophysical and Aeronomic Interest written by Robert D. Hudson and published by . This book was released on 1971 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Absorption Cross Sections of HO2NO2 Vapor written by Luisa T. Molina and published by . This book was released on 1980 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultraviolet absorption cross sections for gas phase HO2NO2 have been measured between 190 and 330 nm, at 298K and 1 atm total pressure. The HO2NO2 vapor was prepared in a flowing N2 stream in the presence of H2O, H2O2, HNO3, and NO2. The composition of the mixture was established by visible and infrared absorption spectroscopy and by chemical titration after absorption in aqueous solutions. The experimental uncertainty (one standard deviation) ranges from 5% at 200 nm to 30% at 330 nm, and mainly falls in the 10% range. The solar photodissociation rate in the troposphere and lower stratosphere is estimated to be about ten to the -5th power/sec for 0 deg solar zenith angle.
Download or read book Ultraviolet Absorption Cross sections of Methyl Bromide at Stratospheric Temperatures written by D. Gillotay and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratospheric Determination of Effective Photodissociation Cross Sections for Molecular Oxygen 191 204 Nm written by and published by . This book was released on 1983 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Balloon-borne spectrometer measurements of solar ultraviolet irradiance have been used to provide direct estimates of effective photodissociation cross-sections (sigma sub i to the e power i = 10Ta lambda interval) for molecular oxygen appropriate for altitudes between 30 and 40 km. The calculations from which can be determined are based on an internally consistent, two-part analysis of ascent spectra. The fine resolution 02 absorption cross section derived from the fractional transmission between two altitudes is convolved with the calibrated insitu irradiance and then integrated over wavelength, yielding photodissociation rate coefficients (J-values) for the conditions of the flight: 22 April 1981 at 33 N latitude and approximately 50 Deg solar zenith angle. The J-values are then decomposed into the signma i sub e and average attenuated irradiances for the selected wavelength intervals. Photochemical models which incorporate these altitude-dependent 02 cross sections will reasonably approximate both the local optical attenuation and the photodissociation rate coefficients, since the sigma i sub e have been calculated by a simultaneous solution of both the attenuation and the photodissociation equations.
Download or read book Scientific Assessment of Ozone Depletion 1991 written by and published by . This book was released on 1991 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UV VIS Absorption Cross Sections and Quantum Yields F r Use in Photochemistry and Atmospheric Modeling written by and published by . This book was released on 1997 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UV VIS Absorption Cross Sections and Quantum Yields F r Use in Photochemistry and Atmospheric Modeling written by Ernst-Peter Röth and published by . This book was released on 1997 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compilation of Ultraviolet Photoabsorption Cross sections for Atoms Between 5 and 3500 Atmospheres written by Robert D. Hudson and published by . This book was released on 1971 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Absorption Cross sections of Some Carbonyl Compounds and Their Temperature Dependence written by D. Gillotay and published by . This book was released on 1993 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Absolute Absorption Cross Sections of Ozone at 300 K 228 K and 195 K in the Wavelength Region 185 240 Nm written by National Aeronautics and Space Administration NASA and published by . This book was released on 2018-10-23 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: An account is given of progress of work on absorption cross section measurements of ozone at 300 K, 228 K and 195 K in the wavelength region 185-240 nm. In this wavelength region, the penetration of solar radiation into the Earth's atmosphere is controlled by O2 and O3. The transmitted radiation is available to dissociate trace species such as halocarbons and nitrous oxide. We have recently measured absolute absorption cross sections of O3 in the wavelength region 240-350 nm (Freeman et al., 1985; Yoshino et al., 1988). We apply these proven techniques to the determination of the absorption cross section of O3 at 300 K, 228 K and 195 K throughout the wavelength region 185-240 nm. A paper titled 'Absolute Absorption Cross Section Measurements of Ozone in the Wavelength Region 185-254 nm and the Temperature Dependence' has been submitted for publication in the Journal of Geophysical Research. Yoshino, K. and Parkinson, W. H. and Freeman, D. E. Unspecified Center NAGW-1788...
