Lina Broman, PhD student at MISU


Simultaneous observations of Noctilucent clouds: hint at the cloud particle size distribution


Long term observations of Polar mesospheric clouds from both satellite and ground-based instruments have proven to be a valuable tool for studies of the complex dynamics as well as the long-term changes of the upper atmosphere. Combining satellite instruments that adapt different measurement technique gives the possibility to also study cloud structures in multiple dimensions, and the microphysical processes involved with the lifecycle of the clouds.  

In this talk I will describe how we compare common volume polar mesospheric cloud observations from a special set of tomographic limb observations to from the Optical Spectrograph and Infrared system (OSIRIS) to the nadir viewing Cloud Imaging and Particle Size (CIPS) instrument. While OSIRIS retrieves cloud properties using spectral analysis, CIPS adapts phase function analysis. Combing these different approaches is challenging due to differences in scattering conditions, observation geometry and sensitivity.  An essential and intriguing question is also choice of assumption on the particle size distribution.


Thursday October 31, 14:15


Rossbysalen C609, Arrhenius laboratory, Svante Arrhenius väg 16C, 6th floor