THE INFLUENCE OF SEA ICE ON THE SEA COAST OF SHANTAR ISLANDS

2017 ◽  
Author(s):  
Margarita Illarionova ◽  
Margarita Illarionova
Keyword(s):  
Sea Ice ◽  
Land Surface ◽  
Sea Of Okhotsk ◽  
World Ocean ◽  
Tidal Currents ◽  
The Sea Of Okhotsk ◽  
The North ◽  
Ice Conditions ◽  
In The Beginning ◽  
Shantar Islands

The Shantar Islands is the group of islands satiated in the Sea of Okhotsk near the exit of Uda Bay, Tugur Bay and Ulban Bay. The islands separated from the mainland and started to exist only 6000 years ago. It happened under the influence of the sea transgression followed by flooding of some parts of the land surface and isolation of the most elevated mountain parts from the mainland. The climate of The Shantar Island is more severe than the climate in the North part of the Sea of Okhotsk due to its proximity to cold regions of Yakutia, complex system of wind and tidal currents, the duration of the ice period, loads of fog and frequent storm winds. The height of tides on the islands can reach 8 meters, and these tidal currents are considered as one of the fastest tides of the World Ocean. The ice near the islands appears in the beginning of November and doesn’t melt for 8-9 months, usually, till mid-July, but some years till mid-August. Such severe ice conditions cannot be observed anywhere else in the Sea of Okhotsk. The variety of forms of the Shantar Islands is a consequence of severe ice conditions, unusual tidal currents and irregularity of the seashore. The most important seashores forming factor is considered to be the activity of sea ice.

THE INFLUENCE OF SEA ICE ON THE SEA COAST OF SHANTAR ISLANDS

2017 ◽  
Author(s):  
Margarita Illarionova ◽  
Margarita Illarionova
Keyword(s):  
Sea Ice ◽  
Land Surface ◽  
Sea Of Okhotsk ◽  
World Ocean ◽  
Tidal Currents ◽  
The Sea Of Okhotsk ◽  
The North ◽  
Ice Conditions ◽  
In The Beginning ◽  
Shantar Islands

The Shantar Islands is the group of islands satiated in the Sea of Okhotsk near the exit of Uda Bay, Tugur Bay and Ulban Bay. The islands separated from the mainland and started to exist only 6000 years ago. It happened under the influence of the sea transgression followed by flooding of some parts of the land surface and isolation of the most elevated mountain parts from the mainland. The climate of The Shantar Island is more severe than the climate in the North part of the Sea of Okhotsk due to its proximity to cold regions of Yakutia, complex system of wind and tidal currents, the duration of the ice period, loads of fog and frequent storm winds. The height of tides on the islands can reach 8 meters, and these tidal currents are considered as one of the fastest tides of the World Ocean. The ice near the islands appears in the beginning of November and doesn’t melt for 8-9 months, usually, till mid-July, but some years till mid-August. Such severe ice conditions cannot be observed anywhere else in the Sea of Okhotsk. The variety of forms of the Shantar Islands is a consequence of severe ice conditions, unusual tidal currents and irregularity of the seashore. The most important seashores forming factor is considered to be the activity of sea ice.

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.

scholarly journals The Impact of the Siberian High and Aleutian Low on the Sea-Ice Cover of the Sea of Okhotsk

1990 ◽  
Vol 14 ◽  
pp. 226-229 ◽  
Author(s):  
Claire L. Parkinson
Keyword(s):  
Sea Ice ◽  
Atmospheric Pressure ◽  
Sea Of Okhotsk ◽  
Ice Cover ◽  
Passive Microwave ◽  
Aleutian Low ◽  
Siberian High ◽  
The Sea Of Okhotsk ◽  
Ice Conditions ◽  
The Impact

Comparison of monthly averaged sea-ice distributions in the Sea of Okhotsk with atmospheric pressure data during the four winters having passive-microwave sea-ice coverage from the Nimbus 5 satellite, 1973–76, revealed a strong apparent relationship between the extent of the sea-ice cover and the influence of the Siberian High atmospheric pressure system. Examination of data for the years 1978–86, having passive-microwave coverage from the Nimbus 7 satellite, reveals that the strong correspondence found for 1973–76 between Okhotsk sea-ice extents and the Siberian High was not maintained in the 1978–86 period. A weaker correspondence continued, however, between the sea ice and the combined Siberian High/Aleutian Low system. A Siberian High/Aleutian Low index was created, and the correlation coefficient between that index and sea-ice extents in the midwinter month of February is 0.97 for the 1973–76 period and 0.52 for the 1978–86 period. Primary reasons for the lack of a consistently strong monthly averaged ice/atmosphere correspondence are: the various oceanographic influences on the sea-ice cover, the failure of monthly averages to reflect fully the important shorter-term interactions between the ice and the atmosphere, and the fact that ice conditions in one month are influenced by ice conditions in previous months.

scholarly journals The Impact of the Siberian High and Aleutian Low on the Sea-Ice Cover of the Sea of Okhotsk

1990 ◽  
Vol 14 ◽  
pp. 226-229 ◽  
Author(s):  
Claire L. Parkinson
Keyword(s):  
Sea Ice ◽  
Atmospheric Pressure ◽  
Sea Of Okhotsk ◽  
Ice Cover ◽  
Passive Microwave ◽  
Aleutian Low ◽  
Siberian High ◽  
The Sea Of Okhotsk ◽  
Ice Conditions ◽  
The Impact

Comparison of monthly averaged sea-ice distributions in the Sea of Okhotsk with atmospheric pressure data during the four winters having passive-microwave sea-ice coverage from the Nimbus 5 satellite, 1973–76, revealed a strong apparent relationship between the extent of the sea-ice cover and the influence of the Siberian High atmospheric pressure system. Examination of data for the years 1978–86, having passive-microwave coverage from the Nimbus 7 satellite, reveals that the strong correspondence found for 1973–76 between Okhotsk sea-ice extents and the Siberian High was not maintained in the 1978–86 period. A weaker correspondence continued, however, between the sea ice and the combined Siberian High/Aleutian Low system. A Siberian High/Aleutian Low index was created, and the correlation coefficient between that index and sea-ice extents in the midwinter month of February is 0.97 for the 1973–76 period and 0.52 for the 1978–86 period. Primary reasons for the lack of a consistently strong monthly averaged ice/atmosphere correspondence are: the various oceanographic influences on the sea-ice cover, the failure of monthly averages to reflect fully the important shorter-term interactions between the ice and the atmosphere, and the fact that ice conditions in one month are influenced by ice conditions in previous months.

Causes and impacts of sea ice variability in the sea of Okhotsk using CESM-LE

2021 ◽  
Author(s):  
Matthew Z. Williams ◽  
Melissa Gervais ◽  
Chris E. Forest
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk
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