20 September 1995
PH: To summarize this flight, it was devoted almost entirely to sampling one plume produced by grass-cerrado burning with some flames. We don't know how much flaming there was when we started, but towards the end it was flaming quite well and producing brownish smoke. We got quite a few samples of the plume itself for emission factors and then quite a few samples further downwind. Then we sampled cloud that it was producing. Sampled just above cloud base and through the middle of the cloud, but then the cloud started to collapse on us. We tried to get some measurements in the collapsed cloud, but there was no sign of smoke there. Then the same fire started to produce another cloud and we sampled that with some good measurements. Then we came back down to the fire itself and did another series of sampling for emission factors. We then did a wind measurement at the altitude of the plume. Then we climbed and sampled another cloud not directly affected by any plume but just by the ambient smoke. Sampled that at two or three altitudes. Okay, Ray?
RW: Let's see. In the cerrado burn we got one good humidigraph, I hope, and I did some ambient humidigraphs as well as in the ambient smoke. It was fairly constant so when those were normalized through the output to the CE neph data did pretty good and the OEC measurements in the cerrado burn were good, so we got good absorption measurements there. And took lots of no-bag samples and it was a pretty complete set.
PH: Is Don there?
DS: Go.
PH: Okay, summarize.
DS: Got some CCN measurements in most everything. I should mention I had a little bit of trouble keeping it going with all of these steeper turns and turbulence. I had a chip shake loose a couple of times, but I should have got some good data in amongst the screwy stuff. DMPS has been working fine. Valero's instrument, no problems as normal. And the CAR worked fine as well.
PH: Okay. Good. Ron.
RF: Excellent flight for emission factors on grass burning. Let's see we got one, two, three in the plume, one in the smoke-cloud mix, and one of the three emission factor measurements we used Dick Gammon's cans for halocarbon emission factors and methyl halide and stuff like that. So, all in all, pretty good sampling on grass fire.
PH: Okay. Jack.
JR: Everything seemed to be okay. I didn't find anything wrong.
PH: Okay. So, that's about the end of SCAR-B. Congratulations and thanks to everyone for all the good work that you have done in this project.