A parallel algorithm for studying the ice cover impact onto seismic waves propagation in the shallow arctic waters

Galina Reshetova, Vladimir Cheverda, Vadim Lisitsa, Valery Khaidykov

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

The seismic study in the Arctic transition zones in the summer season is troublesome because of the presence of large areas covered by shallow waters like bays, lakes, rivers, their estuaries and so on. The winter season is more convenient and essentially facilitates logistic operations and implementation of seismic acquisition. However in the winter there is another complicating factor: intensive seismic noise generated by sources installed on the floating ice. To understand peculiarities of seismic waves and the origin of such an intensive noise, a representative series of numerical experiments has been performed. In order to simulate the interaction of seismic waves with irregular perturbations of underside of the ice cover, a finite-difference technique based on locally refined in time and in space grids is used. The need to use such grids is primarily due to the different scales of heterogeneities in a reference medium and the ice cover should be taken into account. We use the domain decomposition method to separate the elastic/viscoelastic model into subdomains with different scales. Computations for each subdomain are carried out in parallel. The data exchange between the two groups of CPU is done simultaneously by coupling a coarse and a fine grids. The results of the numerical experiments prove that the main impact to noise is multiple conversions of flexural waves to the body ones and vice versa and open the ways to reduce this noise.

Язык оригиналаанглийский
Название основной публикацииSupercomputing - 4th Russian Supercomputing Days, RuSCDays 2018, Revised Selected Papers
РедакторыSergey Sobolev, Vladimir Voevodin
ИздательSpringer-Verlag GmbH and Co. KG
Страницы3-14
Число страниц12
ISBN (печатное издание)9783030058067
DOI
СостояниеОпубликовано - сен 2019
Опубликовано для внешнего пользованияДа
Событие4th Russian Supercomputing Days Conference, RuSCDays 2018 - Moscow, Российская Федерация
Продолжительность: 24 сен 201825 сен 2018

Серия публикаций

НазваниеCommunications in Computer and Information Science
Том965
ISSN (печатное издание)1865-0929

Конференция

Конференция4th Russian Supercomputing Days Conference, RuSCDays 2018
СтранаРоссийская Федерация
ГородMoscow
Период24.09.201825.09.2018

Fingerprint Подробные сведения о темах исследования «A parallel algorithm for studying the ice cover impact onto seismic waves propagation in the shallow arctic waters». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать