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MEGACITY RESPIRATION - Mexico City Example -

. Motivating Concepts. Urban MetabolismCities consume materials and energy (food, fuel, electrical power, water, industrial materials, atmospheric oxygen, etc.)Cities export/excrete materials (industrial goods, sewage, garbage, industrial wastes, gaseous pollutants, and airborne particulates/aerosols)Urban RespirationUrban respiration (oxygen in/primary and secondary gaseous pollutants and airborne particulates/aerosols/out) represents the direct impacts of urban metabolism on the atmospher34889

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MEGACITY RESPIRATION - Mexico City Example -

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    1. MEGACITY RESPIRATION - Mexico City Example -

    2. Motivating Concepts

    3. Urban Respiration Exhalation Products

    8. Aerodyne Mobile Laboratory

    9. Modes of Deployment ON-ROAD SAMPLING -On-road vehicle emissions quantification by vehicle and operating condition -Aggregate (fleet) motor vehicle pollutant emission ratios -Point and area emission plume source location & dispersion measurement -Ambient pollutant mapping STATIONARY SAMPLING -Multiple site deployment during intensive study -High time resolution point sampling -Locate at hard to access sites -Co-located sampling with other researchers

    11. Pico Tres Padres

    12. MCMA Air Pollution

    13. Photochemical Processing at Pico Tres Padres

    14. Oxidation Velocity!

    17. SO2 Plume With Wind Trajectories From Popocatepetl

    18. MCMA Fine PM Characterization

    19. MCMA-2003 CENICA PM2.5 Mass Loading

    20. MCMA-2003 CENICA PM2 Characteristics

    21. MCMA-2003 CENICA Average PM2.5 Mass Composition

    22. MCMA-2003 Fine PM Size Distribution

    23. Mexico City Map Need flat MC2003 map showing city Only put on Merced, Cenica, Santa Ana Merced center CENICA residential Santa Ana edge Air flow is typically north to south during day.Need flat MC2003 map showing city Only put on Merced, Cenica, Santa Ana Merced center CENICA residential Santa Ana edge Air flow is typically north to south during day.

    24. Urban Aerosols City Center and Down Wind City center Light Industrial/ Residential urban Boundary site Dont talk about dynamics, except for air flow Reorganize to vertical like slide 18Dont talk about dynamics, except for air flow Reorganize to vertical like slide 18

    25. Soot Particles Generated from Premixed Flame

    26. Particle Shape can be Investigated Using Multiple Physical Measurements

    27. Get full references Note that flame mode is same Dva for different Dmob Note that fractal dimension = 1.8Get full references Note that flame mode is same Dva for different Dmob Note that fractal dimension = 1.8

    28. Organic Mass Distributions Add time grids on top graph Add dark lines to show two modes for each. Same size dist as before, but in time.Add time grids on top graph Add dark lines to show two modes for each. Same size dist as before, but in time.

    29. Aging of Fractal Combustion Particles Potentially replace bottom panel with a mixed secondary + minor primary, as observed in Urban. This is ruralPotentially replace bottom panel with a mixed secondary + minor primary, as observed in Urban. This is rural

    31. Organic Analysis Refers to Qis talk.Refers to Qis talk.

    32. Summary

    33. Acknowledgements

    34. Likely largely internally mixed Add lines to indicate two modes Some of first data we got, 2000 and 2001 Likely largely internally mixed Add lines to indicate two modes Some of first data we got, 2000 and 2001

    35. Particle Morphology Derived from Combination of AMS and SMPS Measurements Not exact equations (no Cc) X > 1.0 Dmob larger than Dv Dva is less than DvNot exact equations (no Cc) X > 1.0 Dmob larger than Dv Dva is less than Dv

    36. Organic Mass Spectra Add time grids on top graph Add dark lines to show two modes for each. Same size dist as before, but in time.Add time grids on top graph Add dark lines to show two modes for each. Same size dist as before, but in time.

    37. Hydrocarbon and Oxidized Organics

    38. CnH2n+1 and CnH2n-1 (delta 2 and delta 0) for HCs CnH2n+1 and CnH2n-1 (delta 2 and delta 0) for HCs

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