Limonene 50ppb on Beta-Caryo SOA 26.06.2008. Lights on at 09:49.

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Presentation transcript:

Limonene 50ppb on Beta-Caryo SOA

Lights on at 09:49

10 min in: AMS already measuring tons of mass!!

DMPS is seeing very very little though!

Second DMPS scan: 20 min of lights on

Almost a factor of 4.5 higher than DMPS

AMS vs. DMPS The difference in mass is not really true.. The DMPS is averaging only every 10min while the AMS is measuring every 1 min. The Beta-Caryo SOA system changes really rapidaly and therefore a comparison cannot be held until the mass peaks and stabilises..

70 min after lights on

100min mass peaked

Lights off

Clean DMPS scan mass is down to ~ 9 ugm-3 and no change at all to the mode!!

DMPS scan is averaged over time before and after lights on

After dilution

Still no mass formation

Blue distribution?? No change in mass

No change still

About 70 min after lights on nucleation…

AMS mass increased slightly

~3 hours of lights on: Passed the second mass peak

17:16 Lights off