Morphometric Parameters of Stamukhas in the Laptev Sea
- Yevgeny U. Mironov (Arctic and Antarctic Research Institute (AARI)) | Roman B. Guzenko (Arctic and Antarctic Research Institute (AARI)) | Viktor S. Porubaev (Arctic and Antarctic Research Institute (AARI)) | Victor V. Kharitonov (Arctic and Antarctic Research Institute (AARI)) | Stepan V. Khotchenkov (Arctic and Antarctic Research Institute (AARI)) | Aleksandr V. Nesterov (Arctic and Antarctic Research Institute (AARI)) | Konstantin A. Kornishin (Rosneft Oil Company) | Yaroslav O. Efimov (Arctic Research Centre)
- Document ID
- International Society of Offshore and Polar Engineers
- International Journal of Offshore and Polar Engineering
- Publication Date
- December 2019
- Document Type
- Journal Paper
- 383 - 390
- 2019. The International Society of Offshore and Polar Engineers
- morphometric parameters, Stamukha, ice ridge, Laptev Sea
- 1 in the last 30 days
- 1 since 2007
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The article presents the results of an analysis of the expedition data on morphometry and internal structure of stamukhas, investigated in spring 2017 in the southwestern part of the Laptev Sea. Using a thermal drilling method, researchers obtained average and extreme values of all measured parameters and made an approximation by theoretical distribution functions. Analysis of sonar and tachometric survey data shows the average values of stamukha volume/mass to be more than five times greater than the average values of ice ridge volume/mass. The maximum duration of the recorded stamukhas’ drift was thirty days.
Stamukhas are grounded hummocked ice features (WMO, 2014). They present typical forms of immobile ice in the shallow offshore area of the Arctic ice-covered seas. Stamukhas are located in the coastal areas of the ice-covered seas at depths of 20–25 m. One distinguishes both large, separate stamukhas and chains consisting of several stamukhas. Being natural anchors, stamukhas influence the stability of landfast ice and the structure of the ice drift field, since ice floes are destroyed or change drift direction when they come into collision with stamukhas.
In the winter-spring period, stamukhas floating in the shipping routes are high-risk sites for ships and icebreakers, especially when visibility is poor. At the time of significant surge and tidal fluctuations of sea level in spring-summer, stamukhas can possibly float up to the surface and start drifting. Having a larger mass than ice ridges, stamukhas can influence the offshore structures, which makes it necessary to take them into account when calculating the ice loads (Alekseev et al., 2001). In addition, in the wintertime, influenced by the tidal currents, stamukhas can move over insignificant distances, but gouging the seabed at the same time. These negative phenomena should be taken into account in the design and pipe-laying over the seabed of shallow water areas of the seas.
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