Nissen was born in a football family and began playing football in Brande IF when he was 6 years old.
The work has among other things resulted in the EUMETSAT sea ice climate record, a 30 year global sea ice climatology, including temporally and spatially varying uncertainty estimates (Tonboe et al. Christensen came through the youth system at FC Midtjylland.He made his first team debut near the end of the 2010-11 season, coming on as a second-half substitute for Adigun Salami in a 5–2 defeat away to eventual champions FC Copenhagen. The projects have demonstrated that it is possible to derive the thickness of thin ice using L-band radiometry e.g. Both the ongoing ESA climate change initiative on sea ice and the EUMETSAT Ocean and sea ice SAF projects are working towards an improved sea ice concentration estimate using microwave radiometer data. My role in these projects have been diverse from simulation of test data to the implementation of operational algorithms. Using the simulations it was possible to constrain the variables used in more simple emission models to ease the inversion and to estimate uncertainties.