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

scholarly journals Sea-ice drift characteristics revealed by measurement of acoustic Doppler current profiler and ice-profiling sonar off Hokkaido in the Sea of Okhotsk

2011 ◽  
Vol 52 (57) ◽  
pp. 1-8 ◽  
Author(s):  
Yasushi Fukamachi ◽  
Kay I. Ohshima ◽  
Yuji Mukai ◽  
Genta Mizuta ◽  
Masaaki Wakatsuchi
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
Acoustic Doppler Current Profiler ◽  
Ice Thickness ◽  
Coastal Station ◽  
Turning Angle ◽  
The Sea Of Okhotsk ◽  
Ice Drift ◽  
Current Profiler ◽  
Sea Ice Drift

AbstractIn the southwestern part of the Sea of Okhotsk off Hokkaido, sea-ice drift characteristics are investigated using the ice and water velocities obtained from a moored upward-looking acoustic Doppler current profiler (ADCP) during the winters of 1999–2001. Using hourly-mean values of these data along with the wind data measured at a nearby coastal station, the wind factor and turning angle of the relative velocity between the ice and water velocities with respect to the wind are calculated assuming free drift under various conditions. Since the simultaneous sea-ice draft data are also available from a moored ice-profiling sonar (IPS), we examine the dependence of drift characteristics on ice thickness for the first time. As ice thickness increases and wind decreases, the wind factor decreases and the turning angle increases, as predicted by the theory of free drift. This study clearly shows the utility of the moored ADCP measurement for studying sea-ice drift, especially with the simultaneous IPS measurement for ice thickness, which cannot be obtained by other methods.

scholarly journals Evaluation of the representation of Arctic sea ice in the U.K. Hadley Centre GCM

1997 ◽  
Vol 25 ◽  
pp. 423-428
Author(s):  
Douglas M. Smith ◽  
Claire Cooper ◽  
Duncan J. Wingham ◽  
Seymour W. Laxon
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
Seasonal Cycle ◽  
Arctic Sea Ice ◽  
Surface Energy Budget ◽  
Sea Surface ◽  
Hudson Bay ◽  
The Sea Of Okhotsk ◽  
Arctic Sea ◽  
Hadley Centre

The amount of Arctic sea ice predicted by the Hadley Centre Global Cilimate Model (GCM) is evaluated using 15 years of passive-microwave data. While the Hadley model reproduces the seasonal cycle reasonably well, it underestimates the total area of sea ice by more than 3 × 106km2for most of the year. In the winter months, most of the underestimate in ice area results from the prediction of far too little ice in Hudson Bay and the Sea of Okhotsk, leading to an excess of up to 0.2 PW heat input to the atmosphere from Hudson Bay alone. The surface-energy budget of Hudson Bay is investigated using a mixture of surface observations (POLES), satellite data (ATSR, SSM/I and ISCCP) and output from the Goddard Data Assimilation Office analysis. Flux adjustments of the order of 200 Wm−2, resulting from anomalously high sea-surface temperatures in the Levitus (1982) climatology, are found to be the cause of the model’s underestimation of sea ice in both Hudson Bay and the Sea of Okhotsk. The fact that flux adjustments based on an inaccurate climatology will produce errors, even if the model physics is correct, underlines the need both for improved climatologies and for models accurate enough not to require flux adjustment.

Estimation of Sea Ice Drift on the Sea of Okhotsk Shelves Based on Satellite Data

2018 ◽  
Vol 43 (12) ◽  
pp. 871-876
Author(s):  
V. V. Plotnikov ◽  
V. A. Dubina ◽  
N. M. Vakul’skaya
Keyword(s):  
Sea Ice ◽  
Satellite Data ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk ◽  
Ice Drift ◽  
Sea Ice Drift

scholarly journals A Sea Ice Study Using SAR Data in the Sea of Okhotsk

1994 ◽  
Vol 103 (6) ◽  
pp. Plate6-Plate8
Author(s):  
Hiroyuki WAKABAYASHI ◽  
Fumihiko NISHIO ◽  
Masaaki AOTA ◽  
Shuhei TAKAHASHI
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk ◽  
Sar Data

scholarly journals Records of sea-ice extent and air temperature at the Sea of Okhotsk from an ice core of Mount Ichinsky, Kamchatka

2011 ◽  
Vol 52 (58) ◽  
pp. 44-50 ◽  
Author(s):  
Sumito Matoba ◽  
Takayuki Shiraiwa ◽  
Akane Tsushima ◽  
Hirotaka Sasaki ◽  
Yaroslav D. Muravyev
Keyword(s):  
Sea Ice ◽  
Sea Of Okhotsk ◽  
Thermohaline Circulation ◽  
Ice Core ◽  
Solar Irradiation ◽  
Sea Ice Extent ◽  
Arctic Oscillation Index ◽  
High Productivity ◽  
The Sea Of Okhotsk ◽  
Ice Production

AbstarctThe Sea of Okhotsk is the southernmost area in the Northern Hemisphere where seasonal sea ice is produced every year. The formation of sea ice drives thermohaline circulation in the Sea of Okhotsk, and this circulation supports the high productivity in the region. However, recent reports have indicated that sea-ice production in the Sea of Okhotsk is decreasing, raising concern that the decreased sea ice will affect not only circulation but also biological productivity in the sea. To reconstruct climatic changes in the Sea of Okhotsk region, we analyzed an ice core obtained from Ichinskaya Sopka (Mount Ichinsky), Kamchatka. We assumed that the remarkable negative peaks of δD in the ice core were caused by expansion of sea ice in the Sea of Okhotsk. Melt feature percentage (MFP), which indicates summer snowmelt, showed high values in the 1950–60s and the mid-1990s–2000s. The high MFP in the 1950–60s was assumed to be caused by an increase in cyclone activity reaching Kamchatka during a negative period of the Pacific Decadal Oscillation index, and that in the 1990–2000s may reflect the increase in solar irradiation during a positive period of the summer Arctic Oscillation index.

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