BBOP: Tar Balls (TB) in Wildfires 1μm TB are a Major class of Brown Carbon 0.4 0.3 0.2 0.1 0.0 Mass fraction of TB, f TB 00:00 00:30 01:00 01:30 02:00 02:30 Plume Age (hr) 1300 1200 1100 1000 900 800 700 600 B scat /CO (Mm -1 ppb -1 ) Average of limiting CE cases CE TB = CE ORG CE TB = 0 1.0 0.9 0.8 0.7 0.6 0.5 SSA 550nm 00:00 01:00 02:00 Plume age (hr) Calculated SSA calc Strong Tar Ball Abs. m = 1.67 - 0.27i SSA calc Weak Tar Ball Abs. m = 1.56 - 0.02i Background Over fire Downwind SSA field Sedlacek, Buseck, Adachi, et al., 0.25 0.20 0.15 0.10 0.05 0.00 Average TB number fraction 1.0 0.8 0.6 0.4 0.2 0.0 Photochemical Age = -log 10 (NO x /NO y ) TBs are a Weak Absorber TBs are a Major Source of BB PM Emissions TBs are a Secondary Aerosol
3
Embed
2 h BBOP: Tar Balls (TB) in Wildfires - ASR · BBOP: Tar Balls (TB) in Wildfires 2.5 h 2 h 1 h 0 h 2µm 2µm ... POA + SOA 500 400 300 200 100 B abs /CO (Mm-1 m) 00:00 00:30 01:00
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
BBOP:TarBalls(TB)inWildfires
2.5h�
2h�
1h�
0h�
2µm�
2µm�
1µm�
2µm�TBareaMajorclassofBrownCarbon
0.4
0.3
0.2
0.1
0.0
Mas
s fra
ctio
n of
TB
, fTB
00:00 00:30 01:00 01:30 02:00 02:30
Plume Age (hr)
1300
1200
1100
1000
900
800
700
600
Bscat /C
O (M
m-1 ppb
-1)
Average of limiting CE cases CETB = CEORG CETB = 0
1.0
0.9
0.8
0.7
0.6
0.5
SS
A 55
0nm
00:00 01:00 02:00Plume age (hr)
Calculated SSAcalcStrong Tar Ball Abs.m = 1.67 - 0.27i