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Aerosol vertical distribution, new particle formation, and jet aircraft particle emissions in the free troposhere and tropopause region; Vertikalverteilung und Neubildungsprozesse des Aerosols und partikelfoermige Flugzeugemissionen in der freien Troposphaere und Tropopausenregion

Abstract

A contribution to the understanding of natural and anthropogenously induced particle formation as well as aerosol physical transformation processes within the free troposphere (FT) is introduced. Documentation and interpretation of empirical data relevant with respect to possible climatologic impact of anthropogenous aerosol emissions into the atmosphere is presented. The first section describes new technique for high spatial resolution measurements of ultrafine aerosol particles by condensation nucleus counters (CNCs), a necessary prerequisite for the observation of natural particle formation and jet aircraft emissions. The second section illustrates vertical distribution and variability ranges of the aerosol in the FT and the tropopause region (TP). Typical microphysical states of the atmospheric aerosol within the Northern Hemisphere are documented by means of systematic measurements during more than 60 flight missions. Simple mathematical parameterizations of the aerosol vertical distribution and aerosol size distributions are developed. Important aerosol sources within the FT are localized and possible aerosol formation processes are discussed. The third section is focussed on jet-engine particle emissions within the FT and TP. A unique inflight experiment for detection of extremely high concentrations (>10{sup 6} cm{sup -3}) of extremely small (donw to <3 nm) aerosols inside the exhaust plumes of several jet aircraft is  More>>
Authors:
Publication Date:
Jul 01, 2000
Product Type:
Thesis/Dissertation
Report Number:
DLR-FB-2000-35
Reference Number:
EDB-01:050196
Resource Relation:
Other Information: TH: Diss.; PBD: 2000
Subject:
54 ENVIRONMENTAL SCIENCES; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 33 ADVANCED PROPULSION SYSTEMS; AIRCRAFT; AIR POLLUTION; POLLUTION CONTROL; AEROSOLS; NUCLEATION; EMISSION; TROPOSPHERE; TROPOPAUSE; TURBOJET ENGINES; PARTICULATES; DISTRIBUTION; FLIGHT TESTING; DATA ACQUISITION; EXPERIMENTAL DATA; DATA PROCESSING
OSTI ID:
20133633
Research Organizations:
DLR Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Wessling (Germany). Inst. fuer Physik der Atmosphaere; Muenchen Univ. (Germany). Fakultaet fuer Physik
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ISSN 1434-8454; TRN: DE01G0608
Availability:
Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20133633
Submitting Site:
DE
Size:
188 pages
Announcement Date:

Citation Formats

Schroeder, F P. Aerosol vertical distribution, new particle formation, and jet aircraft particle emissions in the free troposhere and tropopause region; Vertikalverteilung und Neubildungsprozesse des Aerosols und partikelfoermige Flugzeugemissionen in der freien Troposphaere und Tropopausenregion. Germany: N. p., 2000. Web.
Schroeder, F P. Aerosol vertical distribution, new particle formation, and jet aircraft particle emissions in the free troposhere and tropopause region; Vertikalverteilung und Neubildungsprozesse des Aerosols und partikelfoermige Flugzeugemissionen in der freien Troposphaere und Tropopausenregion. Germany.
Schroeder, F P. 2000. "Aerosol vertical distribution, new particle formation, and jet aircraft particle emissions in the free troposhere and tropopause region; Vertikalverteilung und Neubildungsprozesse des Aerosols und partikelfoermige Flugzeugemissionen in der freien Troposphaere und Tropopausenregion." Germany.
@misc{etde_20133633,
title = {Aerosol vertical distribution, new particle formation, and jet aircraft particle emissions in the free troposhere and tropopause region; Vertikalverteilung und Neubildungsprozesse des Aerosols und partikelfoermige Flugzeugemissionen in der freien Troposphaere und Tropopausenregion}
author = {Schroeder, F P}
abstractNote = {A contribution to the understanding of natural and anthropogenously induced particle formation as well as aerosol physical transformation processes within the free troposphere (FT) is introduced. Documentation and interpretation of empirical data relevant with respect to possible climatologic impact of anthropogenous aerosol emissions into the atmosphere is presented. The first section describes new technique for high spatial resolution measurements of ultrafine aerosol particles by condensation nucleus counters (CNCs), a necessary prerequisite for the observation of natural particle formation and jet aircraft emissions. The second section illustrates vertical distribution and variability ranges of the aerosol in the FT and the tropopause region (TP). Typical microphysical states of the atmospheric aerosol within the Northern Hemisphere are documented by means of systematic measurements during more than 60 flight missions. Simple mathematical parameterizations of the aerosol vertical distribution and aerosol size distributions are developed. Important aerosol sources within the FT are localized and possible aerosol formation processes are discussed. The third section is focussed on jet-engine particle emissions within the FT and TP. A unique inflight experiment for detection of extremely high concentrations (>10{sup 6} cm{sup -3}) of extremely small (donw to <3 nm) aerosols inside the exhaust plumes of several jet aircraft is described. Particle emission indices and emission-controlling parameters are deduced. Most important topic is the impact of fuel sulfur content of kerosine on number, size and chemical composition of jet particle emissions. Generalized results are parameterized in form of lognormal aerosol particle size distributions. (orig.) [German] Ein Beitrag zum Verstaendnis natuerlicher und anthropogen induzierter Aerosolneubildung sowie physikalischer Aerosolumwandlung in der freien Troposphaere wird vorgestellt. Empirisch gewonnenes Datenmaterial wird dokumentiert und kommentiert im Hinblick auf potentielle Klimawirksamkeit anthropogener Aerosoleintraege in die Atmopshaere. Der erste Teil beschreibt innovative Messtechnik zur raeumlich hochaufloesenden Messung von Kleinstaerosolen im Nanometerbereich auf Basis von Kondensationskernzaehlern (CNC), notwendige Voraussetzung zur Beobachtung von atmosphaerischen Nukleationsereignissen und Flugzeugemissionen. Der zweite Teil umfasst die phaenomenologische Dokumentation von Vertikalverteilung und Variabilitaet des Aerosols innerhalb der Troposphaere und Tropopausenregion. Typische mikrophysikalische Zustaende des Aerosols in mittleren und hohen Breiten der Nordhemisphaere werden in systematischen Messungen aus mehr als 60 Flugmissionen eingegrenzt. Einfache mathematische Parameterisierungen von Aerosolvertikal- und Groessenverteilungen werden entwickelt. Wichtige Aerosolquellen innerhalb der freien Troposphaere werden lokalisiert, moegliche Aerosolneubildungsmechanismen diskutiert. Der dritte Teil charakterisiert partikelfoermige Triebwerksemissionen in der oberen freien Troposphaere. Beschrieben wird ein erweitertes Experiment zur Messung extrem hoher Konzentrationen (>10{sup 6} cm{sup -3}) extrem kleiner Aerosole (bis <2 nm) im Abgasstrahl unterschiedlicher Passagierflugzeuge. Groessenverteilungen und Emissionsindizes werden abgeleitet. Von zentralem Interesse ist der Einfluss des Schwefelgehalts im Treibstoff auf Menge, Groesse und stoffliche Zusammensetzung der neugebildeten Aerosole. Verallgemeinerte Resultate aus drei Einzelexperimenten werden parameterisiert. (orig.)}
place = {Germany}
year = {2000}
month = {Jul}
}