(A) San Francisco Bay Area

 

Based on pool of 23 selected Aqua MAIAC overpasses of only QA = 1 pixels. Five individual ArcGIS sites, listed below.

 

1. Average of AOD: https://arcg.is/1XbzCy

• Average of MAIAC Aqua AOD fields

• Number of Days: 14 (Jan 27, Feb 13, Feb 22, Feb 24, Feb 25, Feb 29, Mar 16, Nov 2, Nov 4, Nov 8, Nov 9, Nov 13, Dec 20, Dec 29).

• No HRRR winds, only average AOD image.

 

1. Nov 2, 2016: https://arcg.is/1iXDr9

• AOD

• HRRR winds

• Station wind measurements

 

1. Dec 29, 2016  https://arcg.is/110GjX0 

• AOD:  

• HRRR winds

• Station wind measurements

 

1. PM2.5 Quantiles:  https://arcg.is/9X5P5

• 50 percentile

• 75 percentile

• 90 percentile

• Derived from AOD fields using NASA ARC method (Chatfield, Sorek-Hamer)

 

1. All Days: http://arcg.is/zGbTm

• AOD only

• Only individual images for 23 days (no average image)

 

 

(B) South Coast Air Basin

 

Based on pool of 29 selected Aqua MAIAC overpasses during winter months of 2016 (Jan, Feb, Mar, Nov, Dec). All AOD images are only QA = 1 pixels (highest quality flag).

 

1. Average of AOD: https://arcg.is/0a0L5i

• Average of MAIAC Aqua AOD fields.

• Number of Days: 22 (1/28, 2/6, 2/8, 2/12, 2/13, 2/15, 2/24, 2/25, 3/16, 3/24, 11/2, 11/3, 11/5, 11/8, 11/10, 11/11, 11/13, 12/3, 12/4, 12/19, 12/27,12/28).

• 7 of full 29 days removed. AOD uniformly low on these 7 days.

 

1. Nov 8, 2016: https://arcg.is/0mb4zb

• AOD

• HRRR winds

• Station wind measurements

• “East Wind” Day 1

 

1. Dec 27, 2016: https://arcg.is/q4WO

• AOD

• HRRR winds

• Station wind measurements

• “East Wind” Day 2

 

1. Nov 5, 2016: https://arcg.is/8XfPr

• AOD

• HRRR winds

• Station wind measurements

• “West Wind” Day 2

 

1. Dec 4, 2016: https://arcg.is/010PiS

• AOD

• HRRR winds

• Station wind measurements

• “West Wind” Day 2

 

1. Nov 13, 2016: https://arcg.is/1a84TK

• AOD

• HRRR winds

• Station wind measurements

• “Weak Wind”, High AOD

 

1. Feb 13, 2016 (note: no HRRR available this day): https://arcg.is/1CS9Of

• AOD

• Highest PM2.5 day

 

1. All Days: https://arcg.is/1ie0zT

• AOD only

• Only individual images for 29 days (no average image)

 

 

(C) Imperial Valley

 

Based on pool of selected Aqua MAIAC overpasses. Only QA = 1 pixels plotted. Three individual ArcGIS sites, listed below.

1. Average of AOD: Westerly Wind Days https://arcg.is/1n0Tjn.

• Average of MAIAC Aqua AOD over all days and individual days

• Number of Days: 11 (3/22, 4/25, 5/5, 5/16, 5/18, 5/20, 5/21, 5/23, 5/24, 5/25, 6/15/2016).

• High westerly winds, high surface PM from ground observations

• Likely windblown dust

• No HRRR winds, only average AOD images

 

1. Average of AOD: Easterly Wind Days https://arcg.is/0zT5fK.

• Average of MAIAC Aqua AOD over all days and individual days

• Number of Days: 12 (3/10, 3/16, 3/25, 5/12, 5/13, 5/28, 5/29, 6/1, 6/7, 6/9, 6/16, 6/24/2016).

• Weak easterly winds, relatively low surface PM from ground observations

• No HRRR winds, only average AOD images

 

1. Sept 12, 2016:  https://arcg.is/1nHePj

• High westerly wind day

• Wind-blown dust day. High surface PM from ground observations.

• HRRR winds overlaid.