For the flight today we took off at 13:26 UTC. After profiling the atmosphere up to 8000 ft we directly started with cloud chasing over the ocean on the eastside of Barbados. Due to the large vertical extension of the first cumulus cloud we choose, we had to ascend again until we reached 8500 ft. For this first cloud PICT was measuring cloud droplets with a mean diameters of 40 µm. Outside the cloud at 0.1 % supersaturation the minature-Cloud Nucleation Counter measured an almost constant value of the total CCN number concentration with 40 cm-3. After circling this cumulus cloud for several minutes we decided to investigate a slightly higher dissapearing shallow alto cumulus cloud layer. The cloud droplets of this cloud layer were smaller with a mean value of about 20 µm detected by PICT. 
Afterwards we began to analyze some smaller low level cumuli. In the following we performed some porpoise flights between 1500 ft and 2500 ft. After almost two hours flight time and without breakdown of any measurement instruments we landed at 15:22 UTC. As you can see in the graph, the total number cocentration of the measured CCN did not changed significantly at different altitudes. At 0.3 % supersaturation it was roughly stable at 100 CCN cm-3.
Afterwards we began to analyze some smaller low level cumuli. In the following we performed some porpoise flights between 1500 ft and 2500 ft. After almost two hours flight time and without breakdown of any measurement instruments we landed at 15:22 UTC. As you can see in the graph, the total number cocentration of the measured CCN did not changed significantly at different altitudes. At 0.3 % supersaturation it was roughly stable at 100 CCN cm-3.
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