EVENTS DATABASE: OZONE ALERTS

DESCRIPTION:

Contains occurrences of ozone alerts in the mid-Atlantic region.

# Occurrences: 7586

# Events: 128

Event Criteria: Consecutive Days

Occurrence Criteria: National Ambient Quality Standard: > 125 ppb in 1 hr, or > 85 ppb in 8 hrs.

Source: Mid-Atlantic Regional Air Management Association (MARAMA).

NOTES:

All times are represented as 18 Z since ozone is a photochemical.

SELECT DATES:

Database Start Year: 1995

Database End Year: 2011

Please select a starting date and ending date for your query:

Start Date: Enter yyyy mm dd - -

End Date: Enter yyyy mm dd

Month:

Order: Earliest to Latest Latest to Earliest

Only gather occurrences with complete date and time information.

Group occurrences by event index.

The above option will generate an average event time and location. The other fields will not be shown if this option is selected.

SELECT FIELDS:

Please select which fields you'd like to retrieve. If you want all of them, skip to the next section.

Field Name
Description
Format
 Incomplete
datetime
The date and time of the occurrence (UTC).
yyyy-mm-dd hh:mm:ss
  
event_index
Describes to which event the occurrence belongs; typically numbered consecutively.
integer
  
lat
The latitude of the occurrence (N-positive).
floating point number
  
lon
The longitude of the occurrence (W-negative).
floating point number
  
state
The US state of the occurrence.
2-letter state abbrev.
  
county
The county of the occurrence.
text
  
c2
8-hour ozone concentration (ppm).
floating point number
 YES
c3
1-hour ozone concentration (ppm).
floating point number
 YES
location
The name of the location of the occurrence.
text

SELECT FORMAT:

Please select a format for viewing your results. Plain text is best for copying into Excel or another file, while web pages are easiest to read if you are just browsing.

Plain Text (csv Ascii)
Web Page

Selecting too many records may take a long time to process, and could even overload the browser.

Limit: records.

Click "Retrieve Events" to submit your query and view the results.

Interface designed by SJG for Pennsylvania State Climate Office; Summer 2005