Characterization of urban pollutant emission fluxes and ambient concentration distributions using a mobile laboratory with rapid response instrumentation.

A large and increasing fraction of the planet's population lives in megacities, especially in the developing world. These large metropolitan areas generally have very high levels of both gaseous and particulate air pollutants that have severe impacts on human health, ecosystem viability, and climate on local, regional, and even continental scales. Emissions fluxes and ambient pollutant concentration distributions are generally poorly characterized for large urban areas even in developed nations. Much less is known about pollutant sources and concentration patterns in the faster growing megacities of the developing world. New methods of locating and measuring pollutant emission sources and tracking subsequent atmospheric chemical transformations and distributions are required. Measurement modes utilizing an innovative van based mobile laboratory equipped with a suite of fast response instruments to characterize the complex and "nastier" chemistry of the urban boundary layer are described. Instrumentation and measurement strategies are illustrated with examples from the Mexico City and Boston metropolitan areas. It is shown that fleet average exhaust emission ratios of formaldehyde (HCHO), acetaldehyde (CH3CHO) and benzene (C6H6) are substantial in Mexico City, with gasoline powered vehicles emitting higher levels normalized by fuel consumption. NH3 exhaust emissions from newer light duty vehicles in Mexico City exceed levels from similar traffic in Boston. A mobile conditional sampling air sample collection mode designed to collect samples from intercepted emission plumes for later analysis is also described.

[1]  Kent C Johnson,et al.  Development and application of a mobile laboratory for measuring emissions from diesel engines. 2. Sampling for toxics and particulate matter. , 2004, Environmental science & technology.

[2]  M. Zahniser,et al.  High precision measurements of atmospheric nitrous oxide and methane using thermoelectrically cooled mid-infrared quantum cascade lasers and detectors. , 2004, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[3]  Scott C Herndon,et al.  Mobile laboratory with rapid response instruments for real-time measurements of urban and regional trace gas and particulate distributions and emission source characteristics. , 2004, Environmental science & technology.

[4]  Steven H Cadle,et al.  Innovative Methods for Emission Inventory Development and Evaluation: Workshop Summary , 2004, Journal of the Air & Waste Management Association.

[5]  Thomas Lanni,et al.  NO and NO2 emission ratios measured from in-use commercial aircraft during taxi and takeoff. , 2004, Environmental science & technology.

[6]  G. Thurston,et al.  Ambient pollutant concentrations measured by a mobile laboratory in South Bronx, NY , 2004 .

[7]  R. Zimmerman,et al.  A comparison of ground-level air quality data with New York State Department of Environmental Conservation monitoring stations data in South Bronx, New York , 2004 .

[8]  L. Kleinman,et al.  Origin and properties of plumes of high ozone observed during the Texas 2000 Air Quality Study (TexAQS 2000) , 2004 .

[9]  Liisa Pirjola,et al.  “Sniffer”—a novel tool for chasing vehicles and measuring traffic pollutants , 2004 .

[10]  Tao Huai,et al.  The effect of fuel sulfur on NH3 and other emissions from 2000-2001 model year vehicles , 2004 .

[11]  Jan Willem Erisman,et al.  Variability of particulate matter concentrations along roads and motorways determined by a moving measurement unit , 2004 .

[12]  J. Morin,et al.  On-road measurements of particle number concentrations and size distributions in urban and tunnel environments , 2004 .

[13]  Charles E. Kolb,et al.  Chase Studies of Particulate Emissions from in-use New York City Vehicles , 2004 .

[14]  G. Sosa,et al.  Measurements of VOCs in Mexico City(1992-2001) and evaluation of VOCs and CO in the emissions inventory , 2004 .

[15]  J Wayne Miller,et al.  Development and application of a mobile laboratory for measuring emissions from diesel engines. 1. Regulated gaseous emissions. , 2004, Environmental science & technology.

[16]  David B. Kittelson,et al.  Nanoparticle emissions on Minnesota highways , 2004 .

[17]  Roberto Casati,et al.  On-road measurement of particle emission in the exhaust plume of a diesel passenger car. , 2003, Environmental science & technology.

[18]  Ulf Kirchner,et al.  Identification of diesel exhaust particles at an Autobahn, urban and rural location using single-particle mass spectrometry , 2003 .

[19]  Ernest Weingartner,et al.  A mobile pollutant measurement laboratory—measuring gas phase and aerosol ambient concentrations with high spatial and temporal resolution , 2002 .

[20]  Cinzia Perrino,et al.  Gaseous ammonia in the urban area of Rome, Italy and its relationship with traffic emissions , 2002 .

[21]  Paul W. Seakins,et al.  New directions: Mobile laboratory reveals new issues in urban air quality , 2002 .

[22]  Tao Huai,et al.  Estimates of the emission rates of ammonia from light-duty vehicles using standard chassis dynamometer test cycles , 2002 .

[23]  M. Baum,et al.  Multicomponent remote sensing of vehicle exhaust by dispersive absorption spectroscopy. 2. Direct on-road ammonia measurements. , 2001, Environmental science & technology.

[24]  Scott Elliott,et al.  ENERGY AND MATERIAL FLOW THROUGH THE URBAN ECOSYSTEM , 2000 .

[25]  Ronald G. Prinn,et al.  Linking local air pollution to global chemistry and climate , 2000 .

[26]  Kenneth A. Smith,et al.  Development of an Aerosol Mass Spectrometer for Size and Composition Analysis of Submicron Particles , 2000 .

[27]  David D. Nelson,et al.  Cross road and mobile tunable infrared laser measurements of nitrous oxide emissions from motor vehicles , 2000 .

[28]  G. Mcfiggans,et al.  Aerosol Development and Interaction in an Urban Plume , 2000 .

[29]  J. Barry McManus,et al.  Methane Emissions at Nine Landfill Sites in the Northeastern United States , 1999 .

[30]  S. Sillman,et al.  Characterization of the Nashville urban plume on July 3 and July 18, 1995 L. J. Nunnennacker, D. Imre, P.H. Daum, L. Kleinman, 1 Y.-N. Lee, J. H. Lee, , 1998 .

[31]  Matthew P. Fraser,et al.  Detection of Excess Ammonia Emissions from In-Use Vehicles and the Implications for Fine Particle Control , 1998 .

[32]  I. Ziomas,et al.  Urban emissions measured with aircraft. , 1998, Journal of the Air & Waste Management Association.

[33]  A. Bouwman,et al.  A global high‐resolution emission inventory for ammonia , 1997 .

[34]  Joanne H. Shorter,et al.  Landfill methane emissions measured by enclosure and atmospheric tracer methods , 1996 .

[35]  P. Crutzen,et al.  Methane emission measurements in urban areas in Eastern Germany , 1996 .

[36]  Melissa G. Trainer,et al.  Regional ozone and urban plumes in the southeastern United States : Birmingham, a case study , 1995 .

[37]  C E Kolb,et al.  Development of atmospheric tracer methods to measure methane emissions from natural gas facilities and urban areas. , 1995, Environmental science & technology.

[38]  David D. Nelson,et al.  Measurement of trace gas fluxes using tunable diode laser spectroscopy , 1995, Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences.

[39]  Joost A. Businger,et al.  Flux measurement with conditional sampling , 1990 .

[40]  J. Weber,et al.  Adenoassociated virus has a unique chromatin structure. , 1982, Canadian journal of biochemistry.

[41]  K. T. Whitby,et al.  Characterization of California aerosols—I. Size distributions of freeway aerosol☆ , 1975 .