Analysis Of Ice Conditions Research Articles

Построение безопасных коридоров судоходства в морях арктического шельфа на основе использования алгоритмов глубокого обучения

A comparative analysis of interannual changes in the ice coverage of the Pechora and the Kara Seas has been conducted based on the information of open sources (satellite observations) gathered by the Arctic and Antarctic Research Institute and the open dataset with mapped ice conditions ArcticDEM. The following problems of the study have been solved: the analysis of the most common approaches to building a forecast based on the analysis of ice conditions has been conducted; a deep learning algorithm to solve the problem of analysis of ice fields has been developed and tested; a medium-term forecast of the condition of ice fields in the area of the Pechora and the Kara Seas has been prepared based on the approbation model example; the obtained results have been analyzed and processed. In the course of study, an algorithm of automated mapping of ice conditions based on the satellite imagery data has been developed; the possibilities of its application to forecast ice conditions automatically, i.e., without using a manmade mapping, have been described. It has been demonstrated that the use of images based on multiple spectral bands and the combination of data from different satellites can minimize the influence of clouds and weather conditions. The model gave the real forecasting accuracy for a period of 10–14 weeks equal to 49–53 % for the Barents (Pechora) and the Kara Seas of 2018–2021. In case the model was fine-tuned and included data from the Barents (Pechora) and Kara Seas before 2018 in the training sample, the accuracy on the data after 2018 increased up to 52–56 %. The feature of the model is its ability to operate with different classes of ice and precisely determine its amount. The developed method increases the efficiency of operational control over the ice conditions in the Arctic seas. Safe navigation routes for shipping transport in the Pechora Sea have been modeled.

Анализ ледовых условий на судоходных трассах Каспийского моря

An analysis of ice conditions on the shipping routes in the northern part of the Caspian Sea is given. The thickness and concentration of sea ice on the routes in the winter seasons of 2011/2012, 2015/2016, and 2022/2023 are considered. The most severe ice conditions were observed in the winter season of 2011/2012. On the basis of satellite information, examples of the spread of stamukhas, which are the ice structures, dangerous for navigation, are given. Keywords: Caspian Sea, ice cover, shipping routes, thickness and concentration of sea ice, stamukhas

Analysis of ice conditions of year-round navigation of Arc7 vessels in the southwestern part of the Kara Sea

Since 2006, a new generation of reinforced ice class Arc7 vessels has been operating on the Northern Sea Route. Safe and efficient sailing of this type of vessels in sea ice demands a detailed study of ice conditions. Accumulation and analysis of data on ice and hydrometeorological conditions for the entire Arctic in comparison with ice conditions along the route of vessels is an essential part of the development of optimal variants and optimal routes for ice navigation.The main aim of the study was to generalize the conditions of ice navigation of Norilskiy Nickel vessels along the optimal navigational routes in the south-western part of the Kara Sea. Based on the reports on sailing obtained from vessels of the “Norilskiy Nickel” type for the 2006–2014 period, we calculated the probability of choosing the optimal route along the Murmansk – Dudinka passage: through the Kara Gate Strait (seaward, central or coastal route) or the north of Cape Zhelaniya. During the year, vessels move predominantly through the Kara Gate. However, for three month per year, from April to June, the most appropriate route lies to the north of the Zhelaniya Cape. In April – May it is, on average, every second navigation, and in June – more than 80 % of all navigation. The features of the ice regime determining the choice of the specific navigation route, are described. The speeds of vessels of the “Norilskiy Nickel” type along various navigation routes in drifting sea ice of the Kara Sea are calculated. The fastest speed in drifting ice was recorded in the winter navigations of 2007–2008 and 2011–2012, in the January-May of these years the average speed was 10.2 and 11.2, correspondingly. The minimum speed in these years, even during the months of maximum ice cover growth, was not less than 4.8 knots. In other years, the average speeds were in the range of 9.2–9.8 knots. During the whole period of study, ice conditions that were extremely difficult for navigation formed three times: at the end of May 2009, at the end of March 2010 and in the middle of March 2011, these are considered in more detail in the present article.

Analysis of Ice Conditions Around the Coastal Nuclear Power Plant in China’s Sea Ice Region Based on Monitoring Data

Analysis of Ice Conditions Around the Coastal Nuclear Power Plant in China’s Sea Ice Region Based on Monitoring Data

Methodology for developing the configuration of an ice load monitoring system for an iceresistant self-propelled drifting platform

The ice-resistant self-propelled platform (IRSPP) named North Pole that is currently under construction at the JSC Admiralty Shipyards is designed to carry out year-round scientific research in the Arctic Ocean. The IRSPP will be equipped with a unique ice loads monitoring system (ILMS). The technical requirements for the ILMS were developed in the Department of Ship Performance in Ice of the AARI. The ILMS should ensure a safe operation of the IRSPP in ice conditions (operational function) and serve as a measuring tool for researching of the mechanics of deformation and destruction of ice (scientific function). Analysis of ice conditions at different stages of IRSPP operation showed that the main scenario of ice interaction with the IRSPP hull will be the action of ice under compression on the middle part of the hull during drift. The monitoring of the stress-strain state of the hull is carried out by a complex system of fiber-optic strain sensors placed on different elements of the hull structures. The largest number of sensors are located on the side plating in the middle part of the IRSPP hull. The locations of the sensors were determined by finite element analysis of the stress-strain state of the IRSPP hull under the action of ice load. To monitor the stress-strain state of the surrounding ice field, up to 16 pressure sensors frozen into the ice are provided. Also, the system receives and stores data on the angles of roll, trim, yaw of IRSPP, its longitudinal, lateral and vertical accelerations, and the surrounding hydrometeorological conditions: wind speed and direction, air temperature, atmospheric pressure, and the geographical position of the platform. ILMS will significantly improve the safety of IRSPP operation during prolonged drift in ice conditions. Besides, the ILMS provides the platform hull with the functions of a measuring tool for studying the mechanics of deformation and destruction of sea ice in interaction with the engineering structures. The main purpose of this work is to create a comprehensive system for studying the processes of ice impact on structures in order to obtain new data about the parameters and nature of ice loads.

Safety of Navigation in the Arctic

Abstract This article presents the results of research based on analysis of ice conditions on the Arctic Sea in recent years and consequences of these changes. The Arctic ice extent are changed due to global warming. Reducing the ice surface leads to intensification of the navigation of the waters of the Arctic Sea, resulting in a significant reduction of the distance between the ports of Europe and East Asia and the North and South Americas. This phenomenon is conducive to the opening of new shipping routes leading through the Arctic Sea. After the entry into force of 1st January, 2017 The International Code for Ships Operating in Polar Waters (Polar Code) is expected to improve the safety of conducting the navigation of the waters. Analysis of maritime accidents in the Arctic waters shows that the number of accidents has a growing trend, however, last year brings them a significant decreasing.

Analysis of Ice Conditions in the Baltis Sea and in the Puck Bay

Abstract The paper presents results of research based on analysis of ice conditions in the Baltic Sea and in the Puck Bay. Analyses are concerned on the last century the maximum ice extents in the Baltic Sea (1915-2015) and ice conditions in the Puck Bay (1986-2005). Ice conditions in the Baltic Sea are generally of average intensity and depend mainly on the type of winters (mild, average/ normal and severe), however, the Baltic bays and gulfs cover the sea ice almost every year. The average ice extent in the Baltic Sea during typical winters, the ice extent in the Baltic Sea during winters in years from 1915 to 2015 and the average time limits the occurrence of the first ice, number of days with ice, ice thickness, terms the disappearance of the last ice in the Puck Bay together with examples of ice forms are presented in this paper. The phenomenon of ice has a significant impact on human activities in the sea, have an effect on weather and climate, plant and animal life, fishery and ports activities and the safety of navigation.

Study on the Highway Speed Limit at the Days of Snow and Ice

In order to prevent traffic accidents caused by bad speed snow day weather and achieve the purpose of protection of highway traffic safety. Through the analysis of ice conditions, we identified of the rate-limiting model in the snow, snow, snow icing conditions and curve sections, we applied to the model and the calculation of mathematical solution and come to the conclusion of the speed limit which is recommended values at the days of snow and ice disaster conditions. In the practical application, it is convenient to get the speed limit under the necessary conditions through look-up the table of this article in order to ensure the safety of traffic on the road.

Climate Change Impact on Canadian Northern Shipping Regulations

The objective of this study was to find what effect climate change would have on the Zone-Date System (ZDS). The paper presents an analysis of ice conditions in the Northwest Passage (NWP) shipping lanes and the access routes to the Port of Churchill in the Hudson Strait. The analysis examines the existing and potential changes to ice regimes in the NWP shipping lanes due to the impact of climate change. The length of the shipping season in the NWP is analyzed for each zone by both the ZDS and the Arctic Ice Regime Shipping System, and both systems are then compared. This paper discusses the results of the analysis.

Sea ice monitoring by L-band SAR: an assessment based on literature and comparisons of JERS-1 and ERS-1 imagery

Spaceborne single-polarization C-band synthetic aperture radar (SAR) imagery is widely used to gather information about the state of the sea ice cover in the polar regions. C-band is regarded as a reasonable choice for all-season monitoring capabilities. For specific mapping tasks, however, other frequency bands can be more suitable. In the first part of this paper, the summary of a literature study dealing with the utilization of L-band SAR imagery for sea ice monitoring is presented. Investigations reveal that if deformation features such as ice ridges, rubble fields, and brash ice are to be mapped, L-band radar is superior in a number of cases. The second part of this paper addresses the comparison of JERS-1 and ERS-1 SAR images that were acquired over sea ice east of Svalbard and along the east coast of Greenland. The effects of the different frequencies, polarizations, and incidence angles of the two SAR systems are discussed. It is demonstrated that the images of both sensors complement one another in the analysis of ice conditions, resulting in a more detailed view of the sea ice cover state.

Analysis of ice conditions in arctic regions according to data of radiophysical measurements by the “Okean-01” satellite

Analysis of ice conditions in arctic regions according to data of radiophysical measurements by the “Okean-01” satellite

Analysis of Ice Conditions in Arctic Using the Data from the Side-Looking Radar and Microwave Radiometer of the "Okean-01" Satellite Series

Analysis of Ice Conditions in Arctic Using the Data from the Side-Looking Radar and Microwave Radiometer of the "Okean-01" Satellite Series