18 September 1995
(This was a transit flight from Maraba to Porto Nacional. Therefore, only limited measurements were obtained.)
12:13 PM
RF: Okay. During our climb, we observed the familiar pattern of some little low-level cumulus about 3,000 ft, which separate fairly smoky air near the ground with more hazy air aloft. Fairly uniform from cloud top up here to 8,000 ft and it looks like we're fairly close to the top. So, this is probably all that old smoke that got pumped up here yesterday by the cumulus cells. So, we're going to sample in this for a while on the way to Porto Nacional and collect lidar data as we go along with CCN, DMPS and humidigraph as well as filters.
1:12 PM
RF: Okay, 13:17, we're continuing our haze layer sampling above the cloud tops. We're starting to skim the cloud tops here. It looks like either the clouds are growing or maybe the terrain is getting a little higher or starting to penetrate the clouds. So, we'll continue along at this altitude for a while, get some cloud physics data and continue our aerosol sampling en route to Porto Nacional.
1:42 PM
RF: Very uniform haze all the way to the ground at Porto Nacional. Nothing like that low-lying smoke layer that we saw before. We concentrated primarily on background haze sampling above the low-level cumulus.
1:44 PM
RF: No sign of fires on the approach into Porto Nacional. Very few fields look to me like they've had any sort of recent burning and we didn't pass through any smoke plumes there on that long descent down into Porto Nacional.