10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Relative Importance of Emissions from Ships, Locomotives, and Freeways in the Communities near Ports of Los Angeles and Long Beach and Their Impact on the Air Quality of Los Angeles Basin
AMIRHOSEIN MOUSAVI, Mohammad Sowlat, Sina Hasheminassab, Olga Pikelnaya, Andrea Polidori, George Ban-Weiss, Constantinos Sioutas, University of Southern California
Abstract Number: 951 Working Group: Air Quality in Megacities: from Sources to Control
Abstract In this work, the impact of emissions from different sources (ships, major freeways, locomotive railway and LAX airport) in the vicinity of port of Long Beach (POLB)(north Long Beach community) and their contribution in the local and regional scale emissions in the Los Angeles air basin is evaluated. particle number (PN), PM2.5 mass and black carbon (BC) ship emission factors were obtained by plume analysis reported by a comprehensive study at POLB by Chalmers University in October-November 2015. In addition, freeway emission factors for the aforementioned species were calculated based on the on-road emission measurements on I-710 and I-110 freeways. Local scale emission rates were quantified with respect to the “impact zone” of POLB with the predominant southerly winds from coast to inland, considering emissions from cargo handling equipment, locomotive railway in POLB and truck activities in the port area. At the local scale, PM2.5 emission rates were driven by locomotive and ship emissions with emission rates of 43.5±7.8 and 39.1± 12.1 kg.day-1, respectively. While locomotive emissions dominated the PN emissions at the local scale, freeway PN emission rates in the impact zone with 8.72× 1019 ± 1.21×1018 particles.day-1 were comparable with the POLB good-movement emission rate. At the local scale, POLB vessel and cargo handling emission sources contributed to the PN, BC and PM2.5 emissions by 16±4%, 21±10% and 28±11%, respectively. Moreover, In the regional scale, PN, PM2.5 and BC total freeway emissions rates of Los Angeles County are 2.92±0.84, 5.53±1.22 and 2.34±0.76 times greater than the total local POLB emissions, respectively. Presented statistics highlight the importance of locomotive and ship emissions from POLB within the impact zone as well as regional scale.