In the eye of a tropical cyclone

We present the results of an analysis performed for tropical cyclone Davina, a storm that lasted for 20 days and crossed the southern Indian Ocean during late winter 1999. From February to March of the same year an experimental campaign, called APE-THESEO, took place in the western Indian Ocean. It aimed to study the microphysical processes occurring in tropical cirrus and the transport of tracers across the tropical tropopause. To accomplish this task, two aircraft were deployed: the DLR Falcon and the M-55 Geophysica. Both of them were equipped with a large number of in situ and remote sensing instruments. On 9 March 1999 the two airplanes took measurements right above and inside the eye of Davina