World Library  


 
  • Cover Image

Quantifying Atmospheric Nitrate Formation Pathways Based on a Glob...

By: M. G. Hastings; D. J. Allman; J. Dachs; B. Alexander; J. A. Thornton; S. A. Kunasek

Description: Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA. The oxygen isotopic composition (Δ17O) of atmospheric nitrate is a function of the relative abundance of atmospheric oxidants (O3, ROx=OH+HO2+RO2) and the formation pathway of nitrate from its precursor NOx (=NO+NO2). Coupled observations and modeling of nitrate Δ17O can be used to quantif...

Alexander, B., Savarino, J., Kreutz, K. J., and Thiemens, M. H.: Impact of preindustrial biomass-burning emissions on the oxidation pathways of tropospheric sulfur and nitrogen, J. Geophys. Res., 109, D08303, doi:10.1029/2003JD004218, 2004.; Alexander, B., Savarino, J., Lee, C. C. W., Park, R. J., Jacob, D. J., Li, Q., Yantosca, R. M., and Thiemens, M. H.: Sulfate formation in sea-salt aerosols: Constraints from oxygen isotopes, J. Geophys. Res., 110, D10307, doi:10.1029...

Read More
  • Cover Image

Uncertainties in Assessing the Environmental Impact of Amine Emiss...

By: S. Solberg; D. Simpson; T. Svendby; N. Castell; M. Karl; S.-e. Walker; J. Starrfelt; R. F. Wright

Description: Norwegian Institute for Air Research, NILU, Kjeller, Norway. In this study, a new model framework that couples the atmospheric chemistry transport model system WRF-EMEP and the multimedia fugacity level III model was used to assess the environmental impact of amine emissions to air from post-combustion carbon dioxide capture. The modelling framework was applied to a typical carbon capture plant artificially placed at Mongstad, west coast of Norwa...

Aas, W., Tsyro, S., Bieber, E., Bergström, R., Ceburnis, D., Ellermann, T., Fagerli, H., Frölich, M., Gehrig, R., Makkonen, U., Nemitz, E., Otjes, R., Perez, N., Perrino, C., Prévôt, A. S. H., Putaud, J.-P., Simpson, D., Spindler, G., Vana, M., and Yttri, K. E.: Lessons learnt from the first EMEP intensive measurement periods, Atmos. Chem. Phys., 12, 8073–8094, doi:10.5194/acp-12-8073-2012, 2012.; Angove, D., Azzi, M...

Read More
  • Cover Image

Aerosol Variability and Atmospheric Transport in the Himalayan Reg...

By: C. Cagnazzo; F. Cairo; L. Di Liberto; S. Bucci; F. Fierli

Description: Institute for Atmospheric Sciences and Climate, ISAC-CNR, Rome, Italy. This work quantifies the spatial distribution of different aerosol types, their seasonal variability and sources.The analysis of four years of CALIOP (Cloud–Aerosol LIdar with Orthogonal Polarization) vertically resolved aerosol data allows the identification of spatial patterns of desert dust and carbonaceous particles in different atmospheric layers. Clusters of Lagrangian back traj...

Bergman, J. W., Fierli, F., Jensen, E. J., Honomichl, S., and Pan, L. L.: Boundary layer sources for the Asian anticyclone: Regional contributions to a vertical conduit, J. Geophys. Res.-Atmos., 118, 2560–2575, doi:10.1002/jgrd.50142., 2013; Bollasina, M., Sumant N., and Lau, K.-M.: Absorbing Aerosols and Summer Monsoon Evolution over South Asia: An Observational Portrayal, J. Climate, 21, 3221–3239.

Read More
  • Cover Image

Particle Partitioning Potential of Organic Compounds is Highest in...

By: A. G. Carlton; B. J. Turpin

Description: Dept. of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, USA. Gas phase water-soluble organic matter (WSOMg) is ubiquitous in the troposphere. In the summertime, the potential for these gases to partition to particle phase liquid water (H2Optcl) where they can form secondary organic aerosol (SOAAQ) is high in the Eastern US and low elsewhere, with the exception of an area near Los Ang...

Blando, J. D. and Turpin, B. J.: Secondary organic aerosol formation in cloud and fog droplets: a literature evaluation of plausibility, Atmos. Environ., 34, 1623–1632, 2000.; Canepari, S., Farao, C., Marconi, E., Giovannelli, C., and Perrino, C.: Qualitative and quantitative determination of water in airborne particulate matter, Atmos. Chem. Phys., 13, 1193–1202, doi:10.5194/acp-13-1193-2013, 2013.%; Carlton, A. G. ...

Read More
  • Cover Image

Validation of Remotely Sensed Profiles of Atmospheric State Variab...

By: T. Von Clarmann

Description: Forschungszentrum Karlsruhe, Institut für Meteorologie und Klimaforschung, Karlsruhe, Germany. This paper summarizes and classifies the various approaches to validation of remote measurements of atmospheric state variables, and tries to recommend a clear and unambiguous terminology. The following approaches have been identified: Intercomparison of individual profiles for accuracy validation; statistical comparison of matched pairs of measurements with ...

Bevington, B. R.: Data reduction and error analysis for physical sciences, MacGraw-Hill Book Company, New York, 1969.; Calisesi, Y., Soebijanta, V. T., and van Oss, R.: Regridding of remote soundings: Formulation and application to ozone profile comparison, J. Geophys. Res., 110, D23306, doi:10.1029/2005JD006122, 2005.; Haseloff, O. W. and Hoffmann, H.-J.: Kleines Lehrbuch der Statistik, de Gruyter, Berlin, 1970.; Carlotti, M., Dinelli, B. M., Raspollini, P., and Ridolfi...

Read More
  • Cover Image

The Influence of the Vertical Distribution of Emissions on Troposp...

By: J. Van Aardenne; A. Pozzer; P. Jöckel

Description: The Cyprus Institute, Energy, Environment and Water Research Centre, Nicosia, Cyprus. The atmospheric chemistry general circulation model EMAC (ECHAM5/MESSy atmospheric chemistry) is used to investigate the effect of height dependent emissions on tropospheric chemistry. In a sensitivity simulation, anthropogenic and biomass burning emissions are released in the lowest model layer. The resulting tracer distributions are compared to those of a former s...

Atkinson, R.: Atmospheric chemistry of {VOC}s and {NO}x, Atmos. Environ., 34, 2063–2101, 2000.; Colarco, P. and Andreae, M.: Biomass burning in the tropics: Impact on atmospheric chemistry and biogeochemical cycles, J. Geophys. Res., 109, D06203, doi:10.1029/2003JD004248, 2004.; Cook, P. et al.: Forest fire plumes over the North Atlantic: p-TOMCAT model simulations with aircragt and satellite measurements from the ITOP/ICARTT campaign, J. Geophys. Res.,...

Read More
  • Cover Image

Quantifying Transport Into the Lowermost Stratosphere Using Simult...

By: A. Engel; H. Bönisch; P. Hoor; Th. Birner; J. Curtius

Description: Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany. The seasonality of transport and mixing of air into the lowermost stratosphere (LMS) is studied using distributions of mean age of air and a mass balance approach, based on in-situ observations of SF6 and CO2 during the SPURT (Spurenstofftransport in der Tropopausenregion, trace gas transport in the tropopause region) aircr...

Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle Atmosphere Dynamics, Academic Press, 1987.; Andrews, A. E., Boering, K. A., Daube, B. C., Wofsy, S. C., Hintsa, E. J., Weinstock, E. M., and Bui, T. P.: Empirical age spectra for the lower tropical stratosphere from in situ observations of CO2: Implications for stratospheric transport, J. Geophys. Res., 104, 26581–26595, 1999.; Andrews, A. E., Boering, K. A., Wofsy, S. C., Daube, B. C., Jones, D. B., Alex...

Read More
  • Cover Image

Mipas Detects Antarctic Stratospheric Belt of Nat Pscs Caused by M...

By: R. Spang; S. H. Svendsen; N. Larsen; P. Massoli; H. Fischer; M. Höpfner; T. V. Clarmann; F. Cairo; S. D. Eckermann; J. Ma; B. Knudsen; B. P. Luo; G. Stiller

Description: Forschungszentrum Karlsruhe, Institut für Meteorologie und Klimaforschung, Karlsruhe, Germany. Space borne infrared limb emission measurements by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) reveal the formation of a belt of polar stratospheric clouds (PSCs) of nitric acid trihydrate (NAT) particles over Antarctica in mid-June 2003. By mesoscale microphysical simulations we show that this sudden onset of NAT PSCs was caused by het...

Read More
  • Cover Image

Stratospheric Ozone Trends and Variability as Seen by Sciamachy Du...

By: H. Bovensmann; C. Gebhardt; A. M. Thompson; D. Degenstein; J. P. Burrows; R. Hommel; M. Weber; A. Rozanov; L. Froidevaux

Description: Institute of Environmental Physics (IUP), University of Bremen, Bremen, Germany. Vertical profiles of the rate of linear change (trend) in the altitude range 15–50 km are determined from decadal O3 time series obtained from SCIAMACHY/ENVISAT measurements in limb viewing geometry. The trends are calculated by using a multivariate linear regression in the zonal bands 5° S–5° N (tropics), 50–60° N, and 50–60° S (mid- to high latitudes). S...

Andersen, S. B., Weatherhead, E. C., Stevermer, A., Austin, J., Brühl, C., Fleming, E. L., Grandpr{é}, J., Grewe, V., Isaksen, I., Pitari, G., Portmann, R. W., Rognerud, B., Rosenfield, J. E., Smyshlyaev, S., Nagashima, T., Velders, G. J. M., Weisenstein, D. K., and Xia, J.: Comparison of recent modeled and observed trends in total column ozone, J. Geophys. Res., 111, D02303, doi:10.1029/2005JD006091, 2006.; Baldwin, M. ...

Read More
  • Cover Image

Technical Note: Minerals in Dust Productive Soils – Impacts and Gl...

By: V. Djurdjevic; M. Vujadinovic; G. Pejanovic; S. Nickovic; A. Vukovic

Description: World Meteorological Organization, Geneva, Switzerland. Dust storms and associated mineral aerosol transport are mainly driven by meso and synoptic scale atmospheric processes. It is therefore essential that the dust aerosol process and background atmospheric conditions that drive the dust emission and atmospheric transport be represented with sufficiently well resolved spatial and temporal features. Effects of airborne dust interactions with the enviro...

Mahowald, N. M., Engelstaedter, S., Luo, C., Sealy, A., Artaxo, P., Benitez-Nelson, C., Bonnet, S., Chen, Y., Chuang, P. Y., Cohen, D. D., Dulac, F., Herut, B., Johansen, A. M., Kubilay, N., Losno, R., Maenhaut, W., Paytan, A., Prospero, J. M., Shank, L. M., and Siefert R. L.: Atmospheric Iron Deposition: Global Distribution, Variability and Human Perturbations, Annu. Rev. Marine Sci., 1, 245–278, doi:10.1146...

Read More
  • Cover Image

Toward Unification of the Multiscale Modeling of the Atmosphere : ...

By: C.-m. Wu; A. Arakawa; J.-h. Jung

Description: University of California, Los Angeles, California, USA. This paper suggests two possible routes to achieve the unification of model physics in coarse- and fine-resolution atmospheric models. As far as representation of deep moist convection is concerned, only two kinds of model physics are used at present: highly parameterized as in the conventional general circulation models (GCMs) and explicitly simulated as in the cloud-resolving models (CRMs). Ideal...

Arakawa, A.: The cumulus parameterization problem: Past, present, and future, J. Climate, 17, 2493–2525, 2004.; Arakawa, A. and Schubert, W. H.: Interaction of a cumulus cloud ensemble with the large-scale environment. Part I, J. Atmos. Sci., 31, 674–701, 1974.; Bjerknes, V.: Das Problem der Wettervorhersage, betrachtet vom Standpunkte der Mechanik und der Physik (The problem of weather prediction, considered from the viewpoints of mechanics and physics). – Meteorol. Z. ...

Read More
  • Cover Image

Photodegradation of Secondary Organic Aerosol Generated from Limon...

By: S. A. Nizkorodov; J. S. Underwood; S. A. Mang; X. Pan; J.-h. Xing

Description: Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, USA. Photodegradation of secondary organic aerosol (SOA) prepared by ozone-initiated oxidation of D-limonene is studied with an action spectroscopy approach, which relies on detection of volatile photoproducts with chemical ionization mass-spectrometry as a function of the UV irradiation wavelength. Efficient photodegradation is observed for a broad range of ozone ...

Atkinson, R. and Arey, J.: Gas-phase tropospheric chemistry of biogenic volatile organic compounds: a review, Atmos. Environ., 37, S197–S219, 2003a.; Atkinson, R. and Arey, J.: Atmospheric degradation of volatile organic vcompounds, Chem. Rev., 103, 4605–4638, 2003b.; Barsanti, K. C. and Pankow, J. F.: Thermodynamics of the formation of atmospheric organic particulate matter by accretion reactions – Part 1: Aldehydes and ketones, Atmos. Environ., 38, 4371–4382, 2004.; Ba...

Read More
  • Cover Image

Implementation and Testing of a Simple Data Assimilation Algorithm...

By: J. Brandt; J. H. Christensen; J. Frydendall

Description: DTU Informatic, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. A simple data assimilation algorithm based on statistical interpolation has been developed and coupled to a long-range chemistry transport model, the Danish Eulerian Operational Model (DEOM), applied for air pollution forecasting at the National Environmental Research Institute (NERI), Denmark. In this paper, the algorithm and the results from experiments designed to find the op...

%Andersson, E., Hollingsworth, A., Kelly, G., Lonnberg, P., Pailleux, J., and %Zhang, Z.: Global Observing System Experiments on Operational Statistical %Retrievals of Satellite Sounding Data, Mon. Weather Rev., 119(8), 1851–1864, %1991.; Balgovind, R., Dalcher, A., Ghil, M., and Kalnay, E.: A Stochastic-Dynamic Model for the Spatial Structure of Forecast Error Statistics, Mon. Weather Rev., 111(4), 701–722, 1983.; Blond, N. and Vautard, R.: Three-dimensional ozone analy...

Read More
  • Cover Image

Diagnosing the Transition Layer in the Extra-tropical Lowermost St...

By: L. El Amraoui; V.-h. Peuch; P. Ricaud; J.-l. Attié; B. Josse; J. Barré; W. A. Lahoz; V. Marécal

Description: CNRM-GAME, Météo-France and CNRS URA1357, Toulouse, France. The behavior of the Extra-tropical Transition Layer (ExTL) in the lowermost stratosphere is investigated using a Chemistry Transport Model (CTM) and analyses derived from assimilation of MLS (Microwave Limb Sounder) O3 and MOPITT (Measurements Of Pollution In The Troposphere) CO data. We use O3-CO correlations to quantify the effect of the assimilation on the height a...

Barré, J., Peuch, V.-H., Attié, J.-L., El Amraoui, L., Lahoz, W. A., Josse, B., Claeyman, M., and Nédélec, P.: Stratosphere-troposphere ozone exchange from high resolution MLS ozone analyses, Atmos. Chem. Phys., 12, 6129–6144, doi:10.5194/acp-12-6129-2012, 2012.   ; Bechtold, P., Bazile, E., Guichard, F., Mascart, P., and Richard, E.: A mass-flux convection scheme for regional and global models, Q. J. Roy. Meteor. So...

Read More
  • Cover Image

Some Implications of Sampling Choices on Comparisons Between Satel...

By: R. G. Grainger; P. I. Palmer; G. E. Thomas; A. M. Sayer

Description: Atmospheric, Oceanic & Planetary Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK. The comparison of satellite and model aerosol optical depth (AOD) fields provides useful information on the strengths and weaknesses of both. However, the sampling of satellite and models is very different and some subjective decisions about data selection and aggregation must be made in order to perform such comparisons. This work examines so...

Stevens, B. and Feingold, G.: Untangling aerosol effects on clouds and precipitation in a buffered system, Nature, 461, 607–613, doi:10.1038/nature08281, 2009.; Stier, P., Feichter, J., Kinne, S., Kloster, S., Vignati, E., Wilson, J., Ganzeveld, L., Tegen, I., Werner, M., Balkanski, Y., Schulz, M., Boucher, O., Minikin, A., and Petzold, A.: The aerosol-climate model ECHAM5-HAM, Atmos. Chem. Phys., 5, 1125–1156, doi:10.5194/acp-5-1125-2005, 2005.; Textor, C., Schulz, M., ...

Read More
  • Cover Image

The Flux of Carbonyl Sulfide and Carbon Disulfide Between the Atmo...

By: H. G. Bingemer; U. Schmidt; X. Xu

Description: Institute for Meteorology and Geophysics, University of Frankfurt, P.O. Box 111932, 60054 Frankfurt am Main, Germany. Turbulent fluxes of carbonyl sulfide (COS) and carbon disulfide (CS2) were measured over a spruce forest in Central Germany using the relaxed eddy accumulation (REA) technique. A REA sampler was developed and validated using simultaneous measurements of CO2 fluxes by REA and by eddy correlation. REA measureme...

Read More
  • Cover Image

Large Scale Changes in 20Th Century Black Carbon Deposition to Ant...

By: J. R. McConnell; M. A. J. Curran; R. Edwards; A. M. Smith; M. M. Bisiaux; T. D. Van Ommen; J. E. Penner; T. A. Neumann; K. Taylor; D. R. Pasteris

Description: Desert Research Institute, Reno, NV, USA. Refractory black carbon aerosols (rBC) emitted by biomass burning (fires) and fossil fuel combustion, affect global climate and atmospheric chemistry. In the Southern Hemisphere (SH), rBC is transported in the atmosphere from low latitudes to Antarctica and deposited to the polar ice sheet preserving a history of emissions and atmospheric transport. Here, we present two high-resolution Antarctic rBC ice core rec...

Andreae, M. O., Jones, C. D., and Cox, P. M.: Strong present-day aerosol cooling implies a hot future, Nature, 435, 1187–1190, 2005.; Bamber, J. L., Gomez-Dans, J. L., and Griggs, J. A.: Antarctic 1 km Digital Elevation Model (DEM) from Combined ERS-1 Radar and ICESat Laser Satellite Altimetry, Boulder, Colorado USA: National Snow and Ice Data Center, Digital Media, 2009.; Banta, J. R., McConnell, J. R., Frey, M. M., Bales, R. C., and Taylor, K.: Spatial and temporal var...

Read More
  • Cover Image

Mass-based Hygroscopicity Parameter Interaction Model and Measurem...

By: D. Rose; V. Merkulov; S. Vlasenko; U. Pöschl; E. Mikhailov

Description: Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany. In this study we derive and apply a mass-based hygroscopicity parameter interaction model for efficient description of concentration-dependent water uptake by atmospheric aerosol particles. The model approach builds on the single hygroscopicity parameter model of Petters and Kreidenweis (2007). We introduce an observable mass-based hygroscopicity parameter Κm

Bilde, M. and Svenningsson, B.: CCN activation of slightly soluble organics: the importance of small amounts of inorganic salt and particle phase, Tellus B, 56, 128–134, 2004.; Carrico, C. M., Petters, M. D., Kreidenweis, S. M., Sullivan, A. P., McMeeking, G. R., Levin, E. J. T., Engling, G., Malm, W. C., and Collett Jr., J. L.: Water uptake and chemical composition of fresh aerosols generated in open burning of biomass, Atmos. Chem. Phys., 10, 5165–5178,

Read More
  • Cover Image

Emulation of a Complex Global Aerosol Model to Quantify Sensitivit...

By: D. V. Spracklen; K. S. Carslaw; K. Pringle; L. A. Lee; G. W. Mann

Description: Institute for Climate and Atmospheric Science, University of Leeds, UK. Sensitivity analysis of atmospheric models is necessary to identify the processes that lead to uncertainty in model predictions, to help understand model diversity, and to prioritise research. Assessing the effect of parameter uncertainty in complex models is challenging and often limited by CPU constraints. Here we present a cost-effective application of variance-based sensitivity ...

Ackerley, D., Highwood, E., Frame, D., and Booth, B.: Changes in the global sulfate burden due to perturbations in global CO2 concentrations, J. Climate, 20, 5421–5432, 2009.; Ackermann, I. J., Hass, H., Memmesheimer, M., Ebel, A., Binkowski, F., and Shankar, U.: Modal aerosol dynamics model for Europe: Development and first applications, Atmos. Environ., 32, 17, 2981–2999, 1998.; Adams, P. J. and Seinfeld, J. H.: Predicting global aerosol size distributions i...

Read More
  • Cover Image

Atmospheric Carbonyl Sulfide (Ocs) Variation from 1992–2004 by Gro...

By: D. W. T. Griffith; N. B. Jones; F. J. Murcray; S. W. Wood; N. M. Deutscher

Description: Department of Chemistry, University of Wollongong, Wollongong, NSW, Australia. Analysis of ground-based high-resolution solar FTIR absorption spectra from four sites was performed to determine trends and variability in OCS columns over the period 1992–2004. The sites were Wollongong, Australia (34.45° S, 150.88° E), Lauder, New Zealand (45.0° S, 169.7° E), Arrival Heights, Antarctica (77.8° S, 166.6° E) and Mauna Loa, Hawaii (19.5° N, 155.6° W). Small b...

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.