Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"New particle formation"”.
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Ion dynamics and aerosol mass spectrometry during atmospheric new particle formation
Eine große Zahl atmosphärischer Aerosolpartikel entsteht durch häufig auftretende sekundäre Neubildungsprozesse. Die aus Vorläufergasen entstehenden Partikel tragen zu einem großen Teil zur Gesamtpartikelanzahl in der Atmosphäre bei und haben somit einen weitreichenden Einfluss auf das Klima. Die …
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Observation of New Particle Formation in the Northern Hemisphere at Altitude from 4 to 20 km
<p>New particle formation (NPF) is investigated using measurements of aerosol size distributions and meteorological variables made in two continents, including USA and Europe. Despite the considerably different aerosol particle abundances among the sites, a common relationship was found between the …
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Organic particle formation in halogen-influenced environments
… and heterogeneous chemistry. Secondary aerosol formation from the reaction of organic trace gases and reactive halogen species can act as an important natural source of organic aerosol. In order to better understand these reactions, aerosol formation from the reaction of α-pinene with chlorine …
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Computer Simulation of Ion-Induced Nucleation in the Presence of Single Ions and Ion Pairs
Atmospheric aerosol particles play an important role in climate and human health. Despite their importance, the mechanisms of their formation are still poorly understood. Ion-induced nucleation may play a role in the process, but details are lacking about how the nucleation rate depends on the …
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Atmospheric chemistry and aerosol associated with the coastal urban environment
… characteristics of aerosols and SOA formation rates, and (3) analyzes factors that impact new particle formation (NPF). Long-term monitoring demonstrated that PM2.5 (particles with diameters of 2.5 m or smaller) concentrations are ~30% larger on days with southerly wind or sea breeze …
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Laboratory studies of atmospheric photochemistry in indoor and outdoor environments
… attention to the reactions that lead to SOA formation, notably those involving oxidant and peroxy radical (RO2) chemistry. First, this thesis examines the oxidation of dimethyl sulfide (DMS), which represents a large natural source of sulfur to the atmosphere and affects the climate. Using …
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Iodine in sea ice and the polar atmosphere.
… the ship and validated by satellite data, and new particle formation. This is the first combined in situ study in Antarctica of organic and inorganic iodine compounds in sea water, ice and air. On the Western Antarctic Peninsula, IO was detected in the atmosphere, and seawater measurements of …
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Modeling The Evolution Of Vehicle Exhaust Plume Near Road And In Laboratory Dilution Systems Using The Ctag Model
… is designed to simulate the transport and transformation of multiple air pollutants in various environments. For near-road applications, CTAG couples the major turbulent mixing processes with gas-phase chemistry and aerosol dynamics. CTAG demonstrates that significant improvement in predicting …