Gavin R. McMeeking

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The spatial distribution of aerosol chemical composition and the evolution of the Organic Aerosol (OA) fraction is investigated based upon airborne measurements of aerosol chemical composition in the planetary boundary layer across Europe. Sub-micron aerosol chemical composition was measured using a compact Time-of-Flight Aerosol Mass Spectrometer(More)
Black carbon (BC) aerosols absorb sunlight thereby leading to a positive radiative forcing and a warming of climate and can also impact human health through their impact on the respiratory system. The state of mixing of BC with other aerosol species, particularly the degree of internal/external mixing, has been highlighted as a major uncertainty in(More)
Black carbon (BC) is a short term climate forcer that directly warms the atmosphere, slows convection, and hinders quantification of the effect of greenhouse gases on climate change. The atmospheric lifetime of BC particles with respect to nucleation scavenging in clouds is controlled by their ability to serve as cloud condensation nuclei (CCN). To serve as(More)
In-situ measurements of aerosol microphysi-cal properties were performed in May 2008 during the EUCAARI-LONGREX campaign. Two aircraft, the FAAM BAe-146 and DLR Falcon 20, operated from Oberpfaf-fenhofen, Germany. A comprehensive data set was obtained comprising the wider region of Europe north of the Alps throughout the whole tropospheric column.(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract Airborne observations of fluorescent aerosol were made aboard an(More)
Elemental-, equivalent black- and refractory black-carbon are terms that have been defined in order to dissect the more general term, black carbon, into its component parts related to its specific chemical and optical properties and its impact on climate and health. Recent publications have attempted to clarify the meaning of these terms with respect to(More)
OF THESIS THE ROLE OF AEROSOLS IN VISIBILITY DEGRADATION DURING TWO FIELD CAMPAIGNS Visibility degradation in federally protected areas has been a matter of growing concern and even congressional regulation. Aerosols are the primary contributor to visibility degradation and can have large anthropogenic sources. For this work, an aerosol sizing system(More)
The main aim of the study was to determine chemical, optical and physical characteristics of aerosol particles responsible for visibility degradation in Yosemite National Park. The park, located in the central Sierra Nevada range in eastern California, was impacted by smoke from wildfire activity in the western United States. Determining the contribution(More)
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