Freitag, 22. April 2011

Very clean clouds

After the dust of the last few days we had some very clean clouds today. PICT measured mean droplet diameters of up to 40 μm (see exapmle on the right) and there were only few CCNs. First we started flying a profile in our measurement area, which was soon cancelled to catch the few clouds above the sea (north of Ragged Point) before they move over land. The cloud base was about 1600 ft high. Afterwards we went back to the measurement area and finished the profile from 8000 ft down to 1000 ft. Meanwhile a lot of nice cumuli were carried with the southeastern wind towards us, which we started chasing then. Moving towards Barbados they grew quite fast. During chasing we got too far north, so we went back to the measurement area, where we catched tinier cumuli. Unfortunately, there was cirrus above us almost all the time. Then cloud chasing was finished and we stayed at about 1600 ft below the clouds so the Mini-CCNC could perform the scan mode. Heading back to the airport we finished with a low level leg.

Keine Kommentare:

Kommentar veröffentlichen