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Main Title Application of Photochemical Models. Volume III. Recent Sensitivity Tests and other Applications of the LIRAQ Model.
Author Wada, Ronald Y. ; Wong, M. Jane ; Leone, Eugene Y. ; Robinson, Lewis H. ; DeMandel., Rob E. ;
CORP Author Association of Bay Area Governments, Berkeley CA.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Year Published 1979
Report Number EPA-68-02-3046; EPA-450/4-79-027;
Stock Number PB81-112898
Additional Subjects Mathematical modeling ; Hydrocarbons ; Nitrogen oxides ; Ozone ; Air pollution control ; Forecasting ; San Francisco Bay ; Transport properties ; Exhaust emissions ; Industrial wastes ; Combustion products ; Assessments ; Photochemistry ; Air quality
Library Call Number Additional Info Location Last
NTIS  PB81-112898 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 104p
Abstract A series of photochemical modeling experiments, using the LIRAQ model applied to the San Francisco Bay Area, was performed to investigate: (1) model sensitivity to the spatial resolution of the gridded emissions, (2) the impact of future HC and NO controls on the future Bay Area NO2 levels, and (3) the future impact of Bay Area HC and NO reductions on O3 in adjacent downwind valleys. The emission resolution experiments consisted of three simulations wherein emissions were smoothed over (1) 5 x 5 km areas, (2) 10 x 10 km areas, and (3) distributed according to population. Changing from 5 km to 10 km resolution changed the O3 maximum concentration by up to 10%. When emissions were distributed proportional to population substantial changes occurred in the timing and magnitude of the O3 maxima. The short-term NO2 experiments consisted of simulating O3 and NO2 fields under meteorological conditions favoring high NO2 buildups. Sensitivity runs were made which suggest that HC control is the most effective strategy for both O3 and NO2. The long range transport experiments consisted of modifying LIRAQ to simulate an expanded 160 x 160 km region that included portions of the Sacramento and San Joaquin Valleys as a 'receptor' region. The results showed that for the prototype day used, downwind O3 was more strongly influenced by initial and boundary conditions than by Bay Area emissions changes.
Supplementary Notes Prepared in cooperation with Bay Area Air Quality Management District, San Francisco, CA., Lawrence Livermore Lab., CA., and Systems Applications, Inc., San Rafael, CA. See also Volume 2, PB80-227523.
NTIS Title Notes Final rept..
PUB Date Free Form Dec 79
Category Codes 13B; 68A
NTIS Prices PC A06/MF A01
Primary Description 200/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 323787484
Origin NTIS
Type CAT