Inverse electromagnetic scattering models for sea ice

Journal ArticleInverse scattering algorithms for reconstructing the physical properties of sea ice from scattered electromagnetic field data are presented. The development of these algorithms has advanced the theory of remote sensing, particularly in the microwave region, and has the potential to form the basis for a new generation of techniques for recovering sea ice properties, such as ice thickness, a parameter of geophysical and climatological importance. Moreover, the analysis underlying the algorithms has led to significant advances in the mathematical theory of inverse problems

Hjarnø Sund – all year, all inclusive: A submerged Late Mesolithic coastal site with organic remains

Between 2009 and 2016, a series of investigations were undertaken at a submerged settlement of the island of Hjarnø in Horsens Fjord, Denmark. The work was prompted by the discovery in 2008 that heavy erosion of a gyttja deposit containing archaeological remains had resulted in artefacts of bone, antler and, not least, wood becoming exposed on the seabed. The investigations revealed that occupation of the site, with a few exceptions, dates to the first half of the Ertebølle culture (5400–4700 BC). In addition to numerous well-preserved artefacts made of organic materials, several areas were found to contain intact shell layers from submerged kitchen middens. Deposits of this kind have not previously been demonstrated in Denmark