THE MORPHODYNAMICS OF THE OKTYABR’SKAYA SPIT (SEA OF OKHOTSK COAST OF KAMCHATKA)

2018 ◽  
Author(s):  
С. Горин ◽  
S. Gorin ◽  
Е. Игнатов ◽  
E. Ignatov ◽  
Е. Кравчуновская ◽  
...  
Keyword(s):  
20Th Century ◽  
Seasonal Dynamics ◽  
Sea Of Okhotsk ◽  
River Estuary ◽  
Archival Data ◽  
Western Coast ◽  
The Sea Of Okhotsk

Oktyabr’skaya Spit is a polygenetic aggradational landform, about 35 km long. It borders the Bol’shaya river estuary (south-western coast of Kamchatka) from the sea of Okhotsk. This talk is based on literature and archival data (18th–20th century) and on fieldwork (2005, 2010–2012 years). Secular, long-term and seasonal dynamics of Oktyabr’skaya Spit is discussed.

LEVEL VARIABILITY OF THE SEA OF OKHOTSK COASTAL AREAS AT THE BEGINING OF THE 21ST CENTURY AND ITS REPRESENTATIONIN THE GLOBAL REANALYSIS DATABASES

2020 ◽  
Vol 42 (4) ◽  
pp. 411-424
Author(s):  
Aleksandr KHOLOPTSEV ◽  
Sergey PODPORIN
Keyword(s):  
Sea Level ◽  
Sea Of Okhotsk ◽  
Tide Gauge ◽  
Coastal Areas ◽  
Global Ocean ◽  
Satellite Monitoring ◽  
Climate Data ◽  
Sea Levels ◽  
The Sea Of Okhotsk

The paper aims to investigate basic features of modern long-term variations of the Okhotsk Sea level in its coastal areas and establish feasibility of certain retrospective analysis databases usage for determination of mean rates of the above processes. The reanalysis databases considered include Global Ocean Physics Reanalysis GLORYS12v.1 by the Copernicus Marine Environment Monitoring Service and ICDC-reanalysis supported by the Integrated Climate Data Center, which provide coverage of the sea in question. The raised problem is of significant interest for physiographers, oceanographers and involved in coastal shipping and marine safety in the Sea of Okhotsk. Long-term sea level variations are most accurately monitored by tide gauge stations, which, however, are scarce along the coast of the sea in question. Less accurate and not uniformly available through easier to use and collect data is the satellite monitoring by radar altimeters. Global retrospective analyses based on mathematical modelling are considered to be an effective instrument to assess sea levels at any given time at any point.

First records from Pacific Mexico of the rare deep-water mysid Ceratomysis spinosa (Crustacea, Peracarida, Mysida, Petalophthalmidae)

2015 ◽  
Vol 8 ◽  
Author(s):  
Michel E. Hendrickx
Keyword(s):  
Deep Water ◽  
Bering Sea ◽  
Posterior Margin ◽  
Sea Of Okhotsk ◽  
Eastern Pacific ◽  
Western Coast ◽  
The Sea Of Okhotsk ◽  
Lateral Margins ◽  
First Time ◽  
The Bering Sea

The deep-water mysidCeratomysis spinosaFaxon, 1893, previously known from Panama, Japan, the Sea of Okhotsk, the Bering Sea and Alaska, USA is reported for the first time off the western coast of Mexico, in the eastern Pacific. The specimens, a male of 27.5 mm in total length (TL) and five females of 28.5–34.5 mm TL, were collected between depths of 1296 and 1580 m. The telson is illustrated, showing numerous setae on the lateral margins, and longer, robust setae in the distal third and on the posterior margin.

scholarly journals Excitation of seiches in ice at port water area of the sea of Okhotsk

2019 ◽  
Vol 486 (4) ◽  
pp. 475-479
Author(s):  
G. I. Dolgikh ◽  
D. P. Kovalev ◽  
P. D. Kovalev
Keyword(s):  
Numerical Simulation ◽  
Spectral Analysis ◽  
Dynamic System ◽  
Sea Of Okhotsk ◽  
Water Area ◽  
External Forcing ◽  
Sea Waves ◽  
Wave Processes ◽  
The Sea Of Okhotsk

Long term observations of sea waves with one second discreteness in the port harbor of Sea of Okhotsk (Sakhalin island) at a depth of about two meters under the ice were carried out using autonomous wave recorders in 2009-2017. Spectral analysis of the data showed the presence of several significant peaks on the periods from 2 to 15 seconds in the spectra for the moments of strong swell at sea. These peaks are caused by wave processes that are generated due to the nonlinear transformation of the swell coming in ice. The numerical simulation of the reaction of the dynamic system - the water area described by the Duffing equation, depending on the parameters included in the equation and determined from experimental observations, is carried out. It is shown, including using the Poincare mapping that the amplitude of external forcing has the greatest influence on the transition of the system to chaos.

scholarly journals Attributing Causes of 2015 Record Minimum Sea-Ice Extent in the Sea of Okhotsk

2017 ◽  
Vol 30 (12) ◽  
pp. 4693-4703 ◽  
Author(s):  
Seungmok Paik ◽  
Seung-Ki Min ◽  
Yeon-Hee Kim ◽  
Baek-Min Kim ◽  
Hideo Shiogama ◽  
...  
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
Coupled Model ◽  
Internal Variability ◽  
Cmip5 Models ◽  
External Forcing ◽  
Sea Ice Extent ◽  
The Sea Of Okhotsk ◽  
The North

In 2015, the sea ice extent (SIE) over the Sea of Okhotsk (Okhotsk SIE) hit a record low since 1979 during February–March, the period when the sea ice extent generally reaches its annual maximum. To quantify the role of anthropogenic influences on the changes observed in Okhotsk SIE, this study employed a fraction of attributable risk (FAR) analysis to compare the probability of occurrence of extreme Okhotsk SIE events and long-term SIE trends using phase 5 of the Coupled Model Intercomparison Project (CMIP5) multimodel simulations performed with and without anthropogenic forcing. It was found that because of anthropogenic influence, both the probability of extreme low Okhotsk SIEs that exceed the 2015 event and the observed long-term trends during 1979–2015 have increased by more than 4 times (FAR = 0.76 to 1). In addition, it is suggested that a strong negative phase of the North Pacific Oscillation (NPO) during midwinter (January–February) 2015 also contributed to the 2015 extreme SIE event. An analysis based on multiple linear regression was conducted to quantify relative contributions of the external forcing (anthropogenic plus natural) and the NPO (internal variability) to the observed SIE changes. About 56.0% and 24.7% of the 2015 SIE anomaly was estimated to be attributable to the external forcing and the strong negative NPO influence, respectively. The external forcing was also found to explain about 86.1% of the observed long-term SIE trend. Further, projections from the CMIP5 models indicate that a sea ice–free condition may occur in the Sea of Okhotsk by the late twenty-first century in some models.

Sign in / Sign up

Export Citation Format

Share Document