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OLS : Record

RECORD NUMBER: 39 OF 69

Main Title Investigation of RADM Performance Using Aircraft Measurements.
Author Ching, J.; Chang, J.; Spicer, C.; Schaller, E.;
CORP Author National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div. ;State Univ. of New York at Albany. Atmospheric Sciences Research Center. ;Battelle Columbus Div., OH. Environmental Sciences Dept. ;Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V., Garmisch-Partenkirchen (Germany, F.R.). Inst. fuer Atmosphaerische Umweltforschung.
Publisher Jan 91
Year Published 1991
Report Number EPA/600/A-92/034;
Stock Number PB92-152974
Subjects Air pollution sampling; Aerial surveys; Acidification; Deposition; Mathematical models; Performance evaluation; Dry methods; Wet methods; Comparison; Concentration(Composition); Regional analysis; Spatial distribution; Regional Acid Deposition Model
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB92-152974 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/28/1992
Collation 6p
Abstract Measurements using specially instrumented aircraft were obtained during August and September, 1988 as an integral part of the ACID MODES (Model Operational and Diagnostic Evaluation Study) field study. Specialized flights, each designed to diagnose different aspects of the performance of the Regional Acid Deposition Model (RADM), were performed. Briefly, zig-zag type horizontal transects (ZIPPER) and vertical up-and-down saw tooth transects (CURTAIN) during fair weather conditions provide an evaluation of the of the skill by which RADM predicts the overall magnitude, as well as the horizontal and vertical gradient and spatial pattern of all the major acidic species and precursers on a regional scale. The data provide a reference for testing the model's ability to distribute primary pollutants from the source regions and to predict the correct magnitude of the gas phase conversion rates exemplified by the secondary species. The Frontal Passage flights were performed to test the RADM's ability to simulate conditions associated with a synoptic front representing a major scavenging event. This is reported in Spicer et al., (1991). Horizontal transects in and above the mixed layer over 1000 km distances were flown parallel to a cold front prior to, soon after, and then during pollutant build up. This series of flights took nearly one week to accomplish. Finally, a set of flights designed to characterize the diurnal behavior of the primary and secondary species over approximately four RADM cells provides the means to evaluate the performance of the gas phase chemistry and the daytime mixing aspects of the RADM. A case study is discussed in Schaller et al., (1991). Individually, each type of flight pattern is designed to emphasize model performance for conditions in which different sets of processes are in control. Collectively, the tests provide a powerful measure of the RADM's overall skill and scientific credibility.
Supplementary Notes Pub. in Joint Conference on Applications of Air Pollution with Air and Waste Management Association (7th), New Orleans, LA., January 14-18, 1991. Prepared in cooperation with State Univ. of New York at Albany. Atmospheric Sciences Research Center, Battelle Columbus Div., OH. Environmental Sciences Dept.
NTIS Title Notes Conference paper.
Category Codes 68A
NTIS Prices PC A02/MF A01
Primary Description 600/09
Document Type NT
Control Number 211524929
Cataloging Source NTIS/MT
Origin NTIS
Type CAT


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