Ozone Data Integration for OTAG Quality Analysis and Evaluation Model

Janja D. Husar and Rudolf B. Husar

CAPITA, Center for Air Pollution Impact and trend AnalysisWashington University

St. Louis, Missouri

AbstractThe Ozone Transport Assessment Group (OTAG) Air Quality Analysis Workgroup has conducted an extensive analysis of the spatial and temporal pattern of ozone, the relationship between ozone and transport, as well as a comparison of model simulations with data. Much of the analysis and model comparison has utilized an integrated ozone database. Ozone monitoring data from seven different data sources (AIRS; CASTNet; EMEFS, SCION; LADCO; Georgia; North Carolina) were acquired and prepared in a common format. Subsequently, the data were integrated and fused into a single database with common units as well as uniform geographic and temporal coding. The integrated data set was extensively quality controlled utilizing a variety of different methods. The resulting data set yielded ozone data between 1988-1995 for over 600 urban, suburban and rural sites over the OTAG domain. All the raw and re-formatted air quality data were shared through the OTAG Air Quality Analysis website. The data sets were also specially prepared and supplied to the OTAG Modeling Workgroup for comparison with the OTAG UAM-V model output.

DESCRIPTION OF THE DATA SETS And Data IntegrationAir quality data for OTAG Air Quality Analysis and UAM-V Model

evaluation has been collected from multiple sources:

Data Set Supplying Organization Years

AIRS EPA 1988, 91, 93, 95

CASTNet EPA 1988, 91, 93, 95

EMEFS Eulerian Model Evaluation and Field Study 1988

SCION Southern Oxidant Study 1993, 95

LADCO Lake Michigan Air Directors Consortium 1991 (88, 93, 95)

GEORGIA State of Georgia 1988-1995

North Carolina State of North Carolina 1988-1995

Data quality notes for CASTNet Network

LocCode LocNAME Time Problem Action Reason

EGB181 Egbert,Ontario

Bad O3data Discard O3from site

Instrummalfuncti

CVL151 Coffeeville,MS

17-Mar-19891400

Spike Do nothing OK Datacontinuous,No AIRS

CNM167 Chiricahua,AZ

9-May-19900400

Spike Do nothing AIRS040038001has spike 135ppb

GCN174 GrandCanyon, AZ

13-Dec-19941300

Spike Discard 1300and 1400 hourdata 3 and 5ppb

BVL130 Bondville, IL 14-Jun-19911200

Spike Do nothing AIRS170198001has spike 145ppb

Data quality notes for EMEFS network

LocCode LocNAME Time Problem Action Reason

08531 Marion, AL 20-Aug-19882200;2300

Spike Delete2200;2300hour points

08529 Moorhead, KY 20-Aug-19882300

Spike Delete 2300point

22560 Deer Creek P,OH

26-Jun-19891600

Spike Do nothing AIRS391298001spike 132 ppb

08533 34 due West,SC

12-Sep-19881500

Spike Delete 1500hour point

08526 Zanesville, OH 05-Seo-19890800

Spike Delete 0800hour point

08065b Penn State, b,PA

22-Jun-19881000,1100,1200

Spike Delete1000,1100,1200 hour points

co-located nospike

CASTNet Station CNM167, Chiricahua, AZ. An AIRS station 040038001 in vicinity had a same spike of 135 ppb in the same time period. Thus, the CASTNet station O3 data for May 9, 1990, 4:00

were kept

CASTNet station EGB181 ozone data were displayed for 1995 only. The signal indicated measurement problem. Ozone data for

CASTNet station EGB181 were removed from the fused data base

EMEFS station 08065b on June 22, 1988 10:00, 11:00 and 12:00 displayed a spike. The co-located station 08065a displayed no spike

in that time period. Thus, the station 08065b on June 22, 1988 10:00, 11:00 and 12:00 readings were removed from the data set

The data set obtained by fusion contained ozone data between 1986-1995 for over 600 urban, suburban and rural sites over the OTAG

domain

The contour map of ozone data for 1991-1995 for June, July, and August using the combined data set