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Sunday, July 19, 2020 | History

2 edition of Ammonia in the continental and remote marine troposphere found in the catalog.

Ammonia in the continental and remote marine troposphere

Lynne Joanne Ashman

Ammonia in the continental and remote marine troposphere

by Lynne Joanne Ashman

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  • 16 Currently reading

Published .
Written in English

    Subjects:
  • Ammonia -- Environmental aspects.

  • Edition Notes

    Statementby Lynne Joanne Ashman.
    The Physical Object
    Paginationx, 48 leaves, bound :
    Number of Pages48
    ID Numbers
    Open LibraryOL16838844M

      particle formation in the marine boundary layer H 2SO 4 is also involved in nucleation in the remote troposphere. At lower altitudes, H 2SO 4-H 2O nucleation may involve other species, including NH 3. 25 Ammonia is the dominant basic species present in the troposphere and is capable of neutralizing these H 2SO 4   Detection of the IEPOX sulfate ester was most sensitive using reduced ionization laser power, when it was observed in up to 80% of particles in the tropical free troposphere. Based on laboratory mass calibrations, IEPOX added > % to tropospheric aerosol mass in the remote tropics and up to 20% in regions downwind of isoprene ://

      A comparative study of nucleation parameterizations: 1. Examination and evaluation of the formulations Yang Zhang,1 Peter H. McMurry,2 Fangqun Yu,3 and Mark Z. Jacobson4 Received 4 March ; revised 20 August ; accepted 25 August ; published 29 October Emissions of marine organic aerosols play a relevant role on cloud formation in regions where there is a high concentration of phytoplankton, for example in the Southern Ocean (SO). Comparisons between GCMs and satellite observations over the SO show that the models simulate too little reflection of shortwave radiation and this is strongly

    Nitrogen is an essential nutrient for phytoplankton growth. Nitrogen is primarily supplied to the surface ocean by mixing from below. However, as fertilizer use and combustion of fossil fuels rise, the atmosphere is expected to become an increasingly important source. Ren et al. measured nitrogen isotopes in organic matter from a South China Sea coral (see the Perspective by Boyle).   During three measurement campaigns on the Baltic and North Seas, atmospheric and dissolved methane was determined with an automated gas chromatographic system. Area-weighted mean saturation values in the sea surface waters were {+-}5% and {+-}82% and {+-}8%. On the bases of our data and a


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Ammonia in the continental and remote marine troposphere by Lynne Joanne Ashman Download PDF EPUB FB2

Tellus (),Ammonia, the dominant base in the remote marine troposphere: a review By PATRICIA K. QUINN, ROBERT J. CHARLSON*, and WILLIAM H. ZOLLER, Department of Chemistry, University of Ammonia in the continental and remote marine troposphere book, Seattle, WashingtonUSA (Manuscript received July 9; in final form December ) ABSTRACT Ammonia appears to be the dominant base in the remote marine troposphere The extension of the continental air mass supplies ammoniated sulfate aerosols to remote marine atmosphere about km from land.

Mineral dust particles are transported from Asian continent over the northwestern Pacific Ocean via the free :// Particles are being formed ubiquitously in the troposphere. Observations of nuclei production have been reported in power plant plumes [Van Valin and Pueschel, ], over remote marine areas of little anthropogenic influence [Covert et al., ; Hoppel et al., a], and in Arctic and Antarctic regions Particulate trace metals in the marine atmosphere that are involved in land–sea exchange are derived from two principal terrestrial sources.

The first is the Earth's crust. Crustal weathering involves low-temperature generation processes, and crust-derived elements are found on particles with mass median diameters (MMDs) in the range ∼1–3 :// Particle formation and growth play key roles in determining the size distribution of remote tropospheric aerosols.

Since these aerosols can have significant global climatic influences, understanding such processes is critical for accurate predictions of future climate. In this research, a method for measuring ultrafine particle concentrations (~ nm diameter) was developed and applied to W/abstract.

The Sulfur Cycle in the Remote Marine Troposphere Figure Dependence of Atmospheric Ammonia Concentration on Temperature and Total-dissolved Ammonia in the Ocean-surface Layer vili. LIST OF TABLES Table Wet Deposition of S04= to Remote Continental Areas Table   The only marine data we have on PAN and PAC is from the North Sea (Ottley and Harrison, ).

Our simulations suggest that neither HNO 3nor HC1 are likely to significantly assist the nuclei growth there. To evaluate the same for remote marine areas, we must rely on separate data on gaseous ammonia, nitric and hydrochloric acid :// Using measurements of aerosol size distributions (  Dp   μm) in the remote marine troposphere between ~ and 13 km altitude obtained during the NASA Atmospheric Tomography (ATom) mission, we show that high concentrations of newly formed particles in the tropical UT over both the Atlantic and Pacific oceans are Using a three-dimensional (3-D) transport model of the troposphere, we calculated the global distributions of ammonia (NH3) and ammonium (NH 4 +), taking into account removal of NH3 on acidic aerosols, in liquid water clouds and by reaction with OH.

Our estimated global 10°×10° NH3 emission inventory of 45 Tg N-NH3 yr− provides a reasonable agreement between calculated wet NH 4   TEST IN U.S. WHERE GOOD A PRIORI EXISTS MOPITT - TRACE-P - GEOS-CHEM INTEGRATION Ma data for CO columns ROLE OF INTEX IN SATELLITE DATA VALIDATION If AURA is launched in earlyINTEX-NA Phase A may provide a first validation: Northern midlatitudes profiles – continental and marine – in coordination with AVE * High ceiling   Web view.

averaged, and the remote marine data were gathered from (LST). od that the concentrations of VOCs in rural regions of the United States and in the remote tropical forests of Brazil are similar to those found in urban centers of the United States; the total Propy-Equiv concentrations from these three regions all range from 50 to ://   Bursts of recently formed particles have been observed in several regions around the world, for example, in the free troposphere 1,5,6,7, in the marine boundary layer 2,8,9,10,11, at coastal sites As gas phase atmospheric ammonia reacts with acidic aerosol particles it affects the chemical, physical, and optical properties of the particles.

A knowledge of the source strengths of NH3 is useful in determining the effect of NH3 on aerosol properties on a regional basis. Here, an attempt is made to determine the direction and magnitude of the air/sea flux of ammonia for the North Atlantic   We also expect nitric acid and ammonia nucleation and rapid growth to be important in the relatively clean and cold upper free troposphere, where ammonia can be convected from the continental The Pacific Exploratory Mission Tropics (PEMT) A () and B () field campaigns occurred over a large area of the Pacific Basin and revealed the presence of "rivers" of continental outflow propagating into the remote marine atmosphere that were also supported by remote sensing and modeling efforts.

Airborne measurements of both the coarse and fine mode aerosol during these campaigns   Measurement of the background levels and study of the chemistry of trace organic carbon species in the remote marine troposphere occurred during an April-July SAGA II cruise of the Pacific and Indian Oceans.

Measured compounds included carboxylic acids, formaldehyde, light hydrocarbons (C{sub 2}-C{sub 4}), and :// The activation process near cloud base for submicrometer, soluble atmospheric aerosols is described and special attention is focused on the fraction, ε, of the total aerosol mass concentration that f   Chemical characteristics of continental outflow from Asia to the troposphere over the western Pacific Ocean during February-March Results from PEM-West B, Talbot, R.W., J.E.

Dibb, B.L. Lefer, et al., Journal of Geophysical Research-Atmospheres, (D23),Heterogeneous and multiphase reactions on solids and in liquids, respectively, have the potential to play a major role in determining the composition of the gaseous troposphere and should be included in models for understanding this region and assessing the effects of anthropogenic emissions.

Making a distinction between reactions on solids (heterogeneous reactions) and those occurring in Ammonia, the most abundant gas-phase alkaline species in the troposphere, is able to neutralize a great portion of the acids, produced by the oxidation of sulfur and nitrogen :// /.

In the marine boundary layer 55% of CCN (%) are from nucleation, with 45% entrained from the the free troposphere and 10% nucleated directly in the boundary layer.

Combinations of model runs show that primary and nucleated CCN are non-linearly ://Long-range transport of continental plumes over the Pacific Basin: Aerosol physiochemistry and optical properties during PEM-Tropics A and B K.

G. Moore II, A. D. Clarke, V. N. Kapustin, and S. G With this method, the speciation of mineral and other particles can be determined, and beam-sensitive particles, such as those containing nitrate and ammonia, can be chemically analyzed.

The focus of the field deployments will be on particles of continental, marine, and anthropogenic origin in the marine boundary layer and marine free ://?AWD_ID=