World Library  


 
  • Cover Image

Ambient Aromatic Hydrocarbon Measurements at Welgegund, South Afri...

By: P. G. Van Zyl; J. P. Beukes; J. J. Pienaar; L. Laakso; H. Hakola; A. Guenther; A. D. Venter; H. Hellén; V. Vakkari; K. Jaars; P. Tiitta; M. Kulmala; H. Laakso; M. Josipovic; H. Aaltonen

Description: Environmental Science and Management, North-West University, Potchefstroom, South Africa. Aromatic hydrocarbons are associated with direct adverse human health effects and can have negative impacts on ecosystems due to their toxicity, as well as indirect negative effects through the formation of tropospheric ozone and secondary organic aerosol that affect human health, crop production and regional climate. Measurements were conducted at the Welgegu...

Air Resources Laboratory: Gridded Meteorological Data Archives, available at: http://www.arl.noaa.gov/archives.php (last access: 12 January 2012), 2009.; Arey, J., Obermeyer, G., Aschmann, S. M., Chattopadhyay, S., Cusick, R. D., and Atkinson, R.: Dicarbonyl products of the OH radical-initiated reaction of a series of aromatics hydrocarbons, Environ. Sci. Technol., 43, 683–689, 2009. %in list; Atkinson, R.: Gas-phase tropo...

Read More
  • Cover Image

Ionization Effect of Solar Particle Gle Events in Low and Middle A...

By: I. A. Mironova; A. J. Tylka; G. A. Kovaltsov; W. F. Dietrich; I. G. Usoskin

Description: Sodankylä Geophysical Observatory (Oulu unit), University of Oulu, Finland. Using a new reconstruction of the solar proton energy spectra for Ground Level Enhancement (GLE) events, based on fits to measurements from ground-based and satellite-borne instruments covering a wide energy range, we quantitatively evaluate the possible ionization effects in the low and middle atmosphere for 58 out of the 66 GLE events recorded by the world-wide ...

Atri, D., Melott, A. L., and Thomas, B. C.: Lookup tables to compute high energy cosmic ray induced atmospheric ionization and changes in atmospheric chemistry, J. Cosmol. Astropart. P., 5, 008, doi:10.1088/1475-7516/2010/05/008, 2010.; Band, D., Matteson, J., Ford, L., Schaefer, B., Palmer, D., Teegarden, B., Cline, T., Briggs, M., Paciesas, W., Pendleton, G., Fishman, G., Kouveliotou, C., Meegan, C., Wilson, R...

Read More
  • Cover Image

Influence of Local Surface Albedo Variability and Ice Crystal Shap...

By: E. Jäkel; M. Wendisch; A. Ehrlich; C. Fricke; M. Wirth; B. Bohn

Description: Leipzig Institute for Meteorology, University of Leipzig, Leipzig, Germany. Airborne measurements of solar spectral radiance reflected by cirrus are performed with the HALO-Solar Radiation (HALO-SR) instrument onboard the High Altitude and Long Range Research Aircraft (HALO) in November 2010. The data are used to quantify the influence of surface albedo variability on the retrieval of cirrus optical thickness and crystal effective radius. The applied re...

Baum, B. A., Heymsfield, A. J., Yang, P., and Thomas, S. M.: Bulk scattering models for the remote sensing of ice clouds. Part I: Microphysical data and models., J. Appl. Meteor., 44, 1885–1895, 2005.; Baum, B. A., Yang, P., Nasiri, S., Heidinger, A. K., Heymsfield, A., and Li, J.: Bulk scattering properties for the remote sensing of ice clouds. Part III: High-resolution spectral models from 100 to 3250 cm−1, J. Appl. Meteor., 46, 423–434, 2007.; Bierwirth, E....

Read More
  • Cover Image

Source Attribution of Bornean Air Masses by Back Trajectory Analys...

By: J. D. Allan; M. Irwin; G. Mills; K. N. Bower; C. E. Reeves; N. H. Robinson; M. Flynn; H. Coe; G. McFiggans; J. F. Hamilton; P. I. Williams; H. M. Newton

Description: Centre for Atmospheric Science, University of Manchester, Manchester, UK. Atmospheric composition affects the radiative balance of the Earth through the creation of greenhouse gases and the formation of aerosols. The latter interact with incoming solar radiation, both directly and indirectly through their effects on cloud formation and lifetime. The tropics have a major influence on incoming sunlight however the tropical atmosphere is poo...

Alfarra, M. R., Prevot, A. S. H., Szidat, S., Sandradewi, J., Weimer, S., Lanz, V. A., Schreiber, D., Mohr, M., and Baltensperger, U.: Identification of the mass spectral signature of organic aerosols from wood burning emissions, Environ. Sci. Technol., 41, 5770–5777, doi:10.1021/es062289b, 2007.; Allan, J. D., Bower, K. N., Coe, H., Boudries, H., Jayne, J. T., Canagaratna, M. R., Millet, D. B., Goldstein, A., Quinn, P. K.,...

Read More
  • Cover Image

Lidar Profiling of Aerosol Optical Properties from Paris to Lake B...

By: P. Chazette; F. Marnas; X. Shang; E. Dieudonné; J. Totems

Description: Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA/CNRS/UVSQ, Gif-sur-Yvette, France. In June 2013, a ground-based mobile lidar performed the 10 000 km ride from Paris to Ulan-Ude, near Lake Baikal, profiling for the first time aerosol optical properties all the way from Western Europe to central Siberia. The instrument was equipped with N2-Raman and depolarization channels that enabled an optical speciation of aerosols in th...

Chi, X., Winderlich, J., Mayer, J.-C., Panov, A. V., Heimann, M., Birmili, W., Heintzenberg, J., Cheng, Y., and Andreae, M. O.: Long-term measurements of aerosol and carbon monoxide at the ZOTTO tall tower to characterize polluted and pristine air in the Siberian taiga, Atmos. Chem. Phys., 13, 12271–12298, doi:10.5194/acp-13-12271-2013, 2013.; Deuzé, J. L., Bréon, F.-M., Devaux, C., Goloub, P., Herman, M., Lafrance,...

Read More
  • Cover Image

Biogenic Emissions of NoX from Recently Wetted Soils Over West Afr...

By: C. M. Taylor; C. E. Reeves; D. J. Stewart; J. B. McQuaid

Description: School of Environmental Sciences, UEA, Norwich, UK. Chemical and meteorological parameters measured on board the Facility for Airborne Atmospheric Measurements (FAAM) BAe 146 Atmospheric Research Aircraft during the African Monsoon Multidisciplinary Analysis (AMMA) campaign are presented to show the impact of NOx emissions from recently wetted soils in West Africa. NOx emissions from soils have been previously observed in many geog...

Yienger, J. J. and Levy, H.: Empirical model of global soil-biogenic NOx emissions, J Geophys Res.-Atmos., 100, 11 447–11 464, 1995.; Brough, N., Reeves, C. E., Penkett, S. A., Stewart, D. J., Dewey, K., Kent, J., Barjat, H., Monks, P. S., Ziereis, H., Stock, P., Huntreiser, H., and Schlager H.: Intercomparison of aircraft instruments on board the C-130 and Falcon 20 over southern Germany during EXPORT 2000, Atmos. Chem. Phys., 3, 1–12, 2003.; Conrad, R.: Soil...

Read More
  • Cover Image

Salsa – a Sectional Aerosol Module for Large Scale Applications :...

By: K. E. J. Lehtinen; T. Anttila; M. Kulmala; H. Korhonen; H. Kokkola; R. Makkonen; S. Järvenoja; V.-m. Kerminen; A.-i. Partanen; A. Laaksonen; H. Järvinen; A. Asmi

Description: Finnish Meteorological Institute, Kuopio Unit, P.O.Box 1627, FI-70211 Kuopio, Finland. The sectional aerosol module SALSA is introduced. The model has been designed to be implemented in large scale climate models, which require both accuracy and computational efficiency. We have used multiple methods to reduce the computational burden of different aerosol processes to optimize the model performance without losing physical features relevant to problemat...

Abdul-Razzak, H. and Ghan, S J.: A parameterization of aerosol activation 3. Sectional representation, J. Geophys. Res., 107, doi:10.1029/2001JD000483, 2002.; Abdul-Razzak, H., Ghan, S J., and Rivera-Carpio, C.: A parameterization of aerosol activation 1. Single aerosol type, J. Geophys. Res., 103, 6123–6131, 1998.; Ackermann, I J., Hass, H., Memmesheimer, M., E A., Binkowski, F S., and Shankar, U.: Modal Aerosol Dynamics Model for Europe: Development and First Applicati...

Read More
  • Cover Image

Validation of Mipas-envisat No2 Operational Data : Volume 7, Issue...

By: F. Hendrick; S. Mikuteit; B. Funke; H. Fischer; G. Stiller; F. Goutail; C. Piccolo; T. Blumenstock; M. Sinnhuber; D. Ionov; J.-p. Pommereau; C. Belotti; G. Zhang; N. Huret; H. Oelhaf; A. Bracher; M. López-puertas; G. Wetzel; A. Bazureau; M. Pirre; M. De Mazière; R. Ruhnke; G. Maucher; J.-c. Lambert; M. Van Roozendael

Description: Institut für Meteorologie und Klimaforschung (IMK), Forschungszentrum Karlsruhe, Karlsruhe, Germany. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument was launched aboard the environmental satellite ENVISAT into its sun-synchronous orbit on 1 March 2002. The short-lived species NO2 is one of the key target products of MIPAS that are operationally retrieved from limb emission spectra measured in the stratosphere a...

Abrams, M. C., Chang, A. Y., Gunson, M. R., Abbas, M. M., Goldman, A., Irion, F. W., Michelsen, H. A., Newchurch, M. J., Rinsland, C. P., Stiller, G. P., and Zander, R.: On the assessment and uncertainty of atmospheric trace gas burden measurements with high resolution infrared solar occultation spectra from space by the ATMOS experiment, Geophys. Res. Lett., 23(17), 2337–2340, doi:10.1029/96GL01794, 1996.; Amekudzi, L. K., Bracher, A., Meyer, J., Rozanov, A., Bovensmann...

Read More
  • Cover Image

Importance of Transboundary Transport of Biomass Burning Emissions...

By: R. Betha; R. Balasubramanian; B. Aouizerats; G. R. Van Der Werf

Description: Faculty of Earth and Life Sciences, VU University Amsterdam, Amsterdam, the Netherlands. Smoke from biomass and peat burning has a notable impact on ambient air quality and climate in the Southeast Asia (SEA) region. We modeled the largest fire-induced haze episode in the past decade (2006) in Indonesia using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem). We focused mainly on the evolution of the fire plume compositi...

Abba, E. J., Unnikrishnan, S., Kumar, R., Yeole, B., and Chowdhury, Z.: Fine aerosol and PAH carcinogenicity estimation in outdoor environment of Mumbai City, India, Int. J. Environ. Heal. R., 22, 134–149, doi:10.1080/09603123.2011.613112, 2012.; Ahmadov, R., McKeen, S. A., Robinson, A., Bahreini, R., Middlebrook, A., de Gouw, J., Meagher, J., Hsie, E., Edgerton, E., Shaw, S., and Trainer, M.: A volatility basis ...

Read More
  • Cover Image

Climatology of Atmospheric Pm10 Concentration in the PO Valley : V...

By: G. Ghermandi; A. Bigi

Description: Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, Modena, Italy. The limits to atmospheric pollutant concentration set by the European Commission provide a challenging target for the municipalities in the Po Valley, because of the characteristic climatic conditions and high population density of this region. In order to assess climatology and trends in the concentration of atmospheric particles in the Po Valley, a data...

ARPA Emilia-Romagna: Air quality in Emilia-Romagna. 2012 Edition, Original title: La qualità dell'aria in Emilia Romagna, Edizione 2012, ARPA Emilia-Romagna, available at: http://www.arpa.emr.it/cms3/documenti/_cerca_doc/aria/report_aria2012.pdf (last access: 21 December 2013), 2012.; Artuso, F., Chamard, P., Piacentino, S., Sferlazzo, D., De Silvestri, L., di Sarra, A., Meloni, D., and...

Read More
  • Cover Image

Variability of Organic and Elemental Carbon, Water Soluble Organic...

By: S.Nbsp;C. Lee; J.Nbsp;J. Cao; J.Nbsp;G. Watson; K. Fung; Y.Nbsp;S. Li; K.Nbsp;F. Ho; J.Nbsp;C. Chow

Description: Research Center for Urban Environmental Technology & Management, Department of Civil & Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China. To determine the levels and variations of carbonaceous aerosol in Hong Kong, PM2.5 and PM10 samples were collected by high volume (Hi-vol) samplers at three monitoring stations (representing middle-scale roadside, urban-, and regional-scale environments) during winter (...

Ballentine, D. C., Macko, S. A., and Turekian, V. C.: Variability of stable carbon isotopic compositions in individual fatty acids from combustion of C4 and C3 plants: implications for biomass burning, Chem. Geol., 152, 151–161, 1998.; Cachier, H., Buat-Menard, P., Fontugne, M., and Rancher, J.: Source terms and source strengths of the carbonaceous aerosol in the Tropics., J. Atmos. Chem., 3, 469–489, 1985.; Cachier, H., Buat-Menard, P., Fontugne, M., and Chesselet, R.: ...

Read More
  • Cover Image

Evaluation of Omi Operational Standard No2 Column Retrievals Using...

By: N. A. Krotkov; E. J. Bucsela; T. N. Knepp; L. N. Lamsal; J. J. Szykman; E. A. Celarier; W. H. Swartz; A. Weinheimer; H. Irie; J. Herman; A. Cede; K. E. Pickering; S. Philip; J. F. Gleason; R. V. Martin

Description: Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD 21046, USA. We assess the standard operational nitrogen dioxide (NO2) data product (OMNO2, version 2.1) retrieved from the Ozone Monitoring Instrument (OMI) onboard NASA's Aura satellite using a combination of aircraft and surface in~situ measurements as well as ground-based column measurements at several locations and a bottom-up NO

Bechle, M. J., Millet, D. B., and Marshall, J. D.: Remote sensing of exposure to NO2, satellite versus ground-based measurement in a large urban, Atmos. Environ., 69, 345–353, doi:10.1016/j.atmosenv.2012.11.046, 2013.; Beirle, S., Platt, U., Wenig, M., and Wagner, T.: Weekly cycle of NO2 by GOME measurements: a signature of anthropogenic sources, Atmos. Chem. Phys., 3, 2225–2232,

Read More
  • Cover Image

Controls on the Movement and Composition of Firn Air at the West A...

By: D. Plotkin; E. D. Sofen; M. Aydin; J. P. Severinghaus; M. O. Battle; S. A. Montzka; P. P. Tans; A. J. Orsi; T. Sowers

Description: Department of Physics and Astronomy, Bowdoin College, 8800 College Station, Brunswick ME, 04011, USA. We sampled interstitial air from the perennial snowpack (firn) at a site near the West Antarctic Ice Sheet Divide (WAIS-D) and analyzed the air samples for a wide variety of gas species and their isotopes. We find only 1–2 m of convective influence in the shallow firn, gravitational enrichment of heavy species throughout the diffusive column in general ...

Andrews, A., Boering, K., Daube, B., Wofsy, S., Hintsa, E., Weinstock, E., and Bui, T.: Empirical age spectra for the lower tropical stratosphere from in situ observations for \carbdiox: Implications for stratospheric transport, J. Geophys. Res., 104, 26581–26595, 1999.; Aydin, M., Montzka, S. A., Battle, M. O., Williams, M. B., De Bruyn, W. J., Butler, J. H., Verhulst, K. R., Tatum, C., Gun, B. K., Plotkin, D. A., Hall, B. D., and Saltzman, E. S.: Post-coring entrapment...

Read More
  • Cover Image

Seasonal Variation of Aerosol Water Uptake and Its Impact on the D...

By: M. Maturilli; P. Tunved; A. M. L. Ekman; M. Tesche; P. Zieger; B. Svenningsson; U. Wideqvist; S. Silvergren; J. Ström; N. Rastak; I. Riipinen

Description: Department of Applied Environmental Science (ITM) and Bert Bolin Centre for Climate Research, Stockholm University, S 114 18 Stockholm, Sweden. In this study we investigated the impact of water uptake by aerosol particles in ambient atmosphere on their optical properties and their direct radiative effect (ADRE, W m−2) in the Arctic at Ny-Ålesund, Svalbard, during 2008. To achieve this, we combined three models, a hygroscopic growth model, a Mi...

Aas, W., Solberg, S., Manø, S., and Yttri, K. E.: Overvåking av langtransportert forurenset luft og nedbør. Atmosfærisk tilførsel, 2008. Norsk institutt for luftforskning, Kjeller, OR 22/2009 (SFT (Klif) rapport nr 1051/2009), 2009.; Achtert, P., Birmili, W., Nowak, A., Wehner, B., Wiedensohler, A., Takegawa, N., Kondo, Y., Miyazaki, Y., Hu, M., and Zhu, T.: Hygroscopic growth of tropospheric particle number size distributions over the North China Plain, J. Geophys. Res,...

Read More
  • Cover Image

Strong Wintertime Ozone Events in the Upper Green River Basin, Wyo...

By: T. Stoeckenius; L. Ackermann; S. Alvarez; J. Golovko; G. Wilkerson; D. Risch; S. Adamson; M. Buhr; B. Hauze; J. Soltis; D. Bush; B. Rappenglück; C. Keslar; D. C. Montague; R. A. Field

Description: Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, USA. During recent years, elevated ozone (O3) values have been observed repeatedly in the Upper Green River basin (UGRB), Wyoming, during wintertime. This paper presents an analysis of high ozone days in late winter 2011 (1 h average up to 166 ppbv – parts per billion by volume). Intensive operational periods (IOPs) of ambient monitoring were performed, which inc...

Altshuller, A. P.: Production of aldehydes as primary emissions and from secondary atmospheric reactions of alkenes and alkanes during the night and early morning hours, Atmos. Environ., 27A, 21–32, 1993.; Ammann, M.: private communication, Paul Scherrer Institute (PSI), Villigen, Switzerland, 2013.; Arya, S. P.: Air Pollution Meteorology and Dispersion, Oxford University Press, USA, 1998.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R...

Read More
  • Cover Image

Pm Measurement Campaign Hovert in the Greater Berlin Area: Model E...

By: D. Möller; A. Kerschbaumer; M. Beekmann; R. Stern; E. Reimer

Description: Laboratoire Interuniversitaire de Systèmes Atmosphériques (LISA), CNRS UMR 7583, University Paris 7, University Paris 12, 61 Av. du Général de Gaulle, 94000 Créteil, France. The HOVERT (HOrizontal and VERtical Transport of ozone and particulate matter) campaign held in the Berlin Brandenburg area in Eastern Germany from September 2001 to September 2002 allowed to collect a unique data set of the aerosol chemical speciation (daily averages) at traffic, urb...

Bessagnet, B., Hodzic, A., Vautard, R., Beekmann, M., Cheinet, S., Honoré, C., Liousse, C., and Rouil, L.: Aerosol modelling with CHIMERE – preliminary evaluation at the continental scale, Atmos. Environ., 38, 2803–2817, 2004.; Bond, T. C., Streets, D. G., Yarber, K. F., Nelson, S. M., Woo, J. H., and Klimont, Z.: A technology-based global inventory of Black and Organic Carbon emissions from Combustion, J. Geophys. Res., 109, D14203, doi:10.1029/2003JD003697, 2004.; Buil...

Read More
  • Cover Image

Hemispheric Average Cl Atom Concentration from 13C/12C Ratios in A...

By: D. Lowe; W. Allen; U. Platt

Description: Institut für Umweltphysik, University of Heidelberg, INF 229, D-69120 Heidelberg. Methane is a significant atmospheric trace gas in the context of greenhouse warming and climate change. The dominant sink of atmospheric methane is the hydroxyl radical (OH). Recently, a mechanism for production of chlorine radicals (Cl) in the marine boundary layer (MBL) via bromine autocatalysis has been proposed. The importance of this mechanism in producing a methane s...

Read More
  • Cover Image

So2 Photolysis as a Source for Sulfur Mass-independent Isotope Sig...

By: S. Ono; H. Guo; B. Jiang; A. R. Whitehill

Description: Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA. Signatures of sulfur isotope mass-independent fractionation (S-MIF) have been observed in stratospheric sulfate aerosols deposited in polar ice. The S-MIF signatures are thought to be associated with stratospheric photochemistry following stratospheric volcanic eruptions, but the exact mechanism responsible f...

Ahmed, M. M.: Theoretical studies on the ground and excited states of SO3 triatomic molecule, Chem. Sci. Trans., 2, 781–796, doi:10.7598/cst2013.515, 2013.; Astholz, D. C., Glanzer, K., and Troe, J.: The spin-forbidden dissociation-recombination reaction SO3 → SO2 +O, J. Chem. Phys., 70, 2409–2413, doi:10.1063/1.437751, 1979.; Baroni, M., Thie...

Read More
  • Cover Image

Divergence of Sun-rays by Atmospheric Refraction at Large Solar Ze...

By: R. Uhl; T. Reddmann

Description: Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Germany. For the determination of photolysis rates at large zenith angles it has been demonstrated that refraction by the earth's atmosphere must be taken into account. In fact, due to the modified optical path the optical transmittance is thereby increased in most instances. Here we show that in addition the divergence of sun-rays, which is also caused by refraction but which ...

Read More
  • Cover Image

Using a Mobile Laboratory to Characterize the Distribution and Tra...

By: Y. Li; J. P. Zhang; T. Zhu; Q. H. Zhang; M. Wang; Z. F. Wang; W. W. Lin

Description: State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China. Megacities are places with intensive human activity and energy consumption. To reduce air pollution, many megacities have relocated energy supplies and polluted industries to their outer regions. However, regional transport then becomes an important source of air pollution in megacities. To i...

An, X., Zhu, T., Wang, Z., Li, C., and Wang, Y.: A modeling analysis of a heavy air pollution episode occurred in Beijing, Atmos. Chem. Phys., 7, 3103–3114, doi:10.5194/acp-7-3103-2007, 2007.; Beijing Statistical Yearbook: China Statistics Press, Beijing, China. 2009.; Beryrich, F., Grafe, H., Kuchler, W., Lindemann, C., and Schaller, E.: An obervational study of sulphur dioxide transport across the erzgebirge mountai...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.