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The Great Midwestern PM2.5 Episode of February 2005

The Great Midwestern PM2.5 Episode of February 2005. A compendium of data from the LADCO ftp site Compiled by Donna Kenski from data contributed by Rudy Husar, Wash. Univ; Matthew Harrell, Ill EPA; Neal Conatser, Mich. DEQ; Bob Swinford, Ill. EPA; and Jay Turner, Wash. Univ. Background.

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The Great Midwestern PM2.5 Episode of February 2005

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  1. The Great Midwestern PM2.5 Episode of February 2005 A compendium of data from the LADCO ftp site Compiled by Donna Kenski from data contributed by Rudy Husar, Wash. Univ; Matthew Harrell, Ill EPA; Neal Conatser, Mich. DEQ; Bob Swinford, Ill. EPA; and Jay Turner, Wash. Univ.

  2. Background • Midwest experienced a multiday PM episode from ~Jan 28 to Feb 7, 2005 • Concentrations led to AQIs > 100, poor visibility, media attention • LADCO dedicated an ftp site as a repository for episode-related data and information • Email listserv of interested analysts periodically share new info as it becomes available • LADCO intends to produce a summary of the episode that will include some historical perspective, meteorological factors, etc. Others (Canadians) are modeling the episode; AIRNOW is presenting paper to AMS. • Slides that follow are examples of data available and posted to ftp site

  3. Regional Average PM25 Concentration PatternBased on AIRNOW From Rudy Husar • Time pattern of the 0502 Event • The overall event lasted about 10 days, Jan 28-February 7 • The Upper Midwest peaked first (Jan 31-Feb 2); Industrial MW later (Feb 3 – 6) • The Industrial MW region show more diurnal variation (lowest in the mid-afternoon) 0502 PM Event PM Event

  4. From Rudy Husar AIRNOW Jan.24, 2005 Jan.25, 2005 Jan.26, 2005 Jan.27, 2005 Jan.28, 2005 Jan.29, 2005 Jan.30, 2005 Jan.31, 2005 Feb. 1, 2005 Feb. 2, 2005 Feb. 3, 2005 Feb. 4, 2005 Feb. 5, 2005 Feb. 6, 2005

  5. From Matt Harrell, Illinois EPA February 3, 2005 24-hr PM2.5 Values Data obtained from USEPA's AIRNOW mapping system. All values are unverified.

  6. 24 hr Average PM-2.5 Concentrations in Michigan (1/26/05 thru 2/10/05) From Neal Conatser, Mich. DEQ

  7. Dirty Below / Clean Above From Neal Conatser, Mich. DEQ

  8. 12Z Soundings (02/01/05 to 02/08/05) From Neal Conatser, Mich. DEQ

  9. 24 hr Average PM-2.5 Concentrations in Michigan (1/26/05 thru 2/10/05) warm air advection cold front approaches From Neal Conatser, Mich. DEQ strong cold front passes weak cold front passes

  10. Jan 30 2005 Jan 31 2005 Feb 1 2005 Feb 2 2005 Feb 3 2005 Feb 4 2005 Feb 5 2005 Feb 6 2005 Plots of average daily temperature from Midwest Climate Center Feb 7 2005

  11. Jan. 30 2005 Jan 31 2005 Feb 1 2005 Feb 2 2005 Feb 3 2005 Feb 4 2005 Feb 5 2005 Feb 6 2005 Maps of snow cover from NOAA: http://www.ssd.noaa.gov/PS/SNOW/ Feb 7 2005

  12. Data from Bob Swinford, Illinois EPA

  13. Data from Jay Turner, WU

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