Polar regions
The Arctic warms several times faster than the global mean. Within (AC)³ I study how sea ice, leads and clouds shape the surface energy budget.
Research interests
Airborne observations
Research flights with Polar 5 and Polar 6, plus tethered-balloon profiles. With the thermal infrared imager VELOX I map surface skin temperature and surface type.
Satellite remote sensing
MODIS, VIIRS and Sentinel data put the flights into context. I turn them into sea-ice and lead fields for the ICON model and compare aircraft data with EarthCARE.
Clouds
Mixed-phase clouds in marine cold-air outbreaks and their thermal-infrared radiative effect, measured from the aircraft below and the satellite above.
Explore
Minecraft map
map.polarjosh.com
The Arctic rebuilt as a Minecraft world from ArcticDEM terrain, sea ice and ICON clouds. Walk it in 3D.
Satellite browser
sat.polarjosh.com
MODIS, VIIRS, SLSTR and AVHRR swaths over Svalbard and the Fram Strait, fetched and rendered every hour.
MSS forecast explorer login
mss2.meteo.uni-leipzig.de/explorer
Forecast explorer for research flights: model fields on a globe, vertical sections and trajectories along the flight track.
pyRadtran
franzflink.github.io/pyRadtran
Python wrapper for the libRadtran radiative transfer package: xarray-ready output and simulations run in parallel.