Hummocks near the North Pole 35 drifting station

Study of hummocks is a very important applied and scientific problem. The main objective of this work is representing new information on structure of hummocks that were studied in the spring time at the North Pole 35 drifting station. In this paper, methodology and results of studying several hummocks with different morphology are considered. The maximum hummock keel draft varied from 3.5 to 14 m, while the maximum sail height was between 2.5 and 3.9 m. The hummock porosity and porosity of the unconsolidated part of its keel varied in the range of 6–18 and 4–26%, respectively. The average thickness of the hummock consolidated layer stayed in the range from 1.8 to 2.4 m. It was found that relatively small sail heights do not affect the consolidated layer thickness, however higher sails influence on the consolidated layer size. The higher the hummock sail, the less its consolidated layer thickness is.