scholarly journals Variability in Bering Sea ice cover as affected by a regime shift in the North Pacific in the period 1947-1996

1998 ◽  
Vol 103 (C12) ◽  
pp. 27717-27737 ◽  
Author(s):  
H. J. Niebauer
Keyword(s):  
Sea Ice ◽  
Bering Sea ◽  
North Pacific ◽  
Regime Shift ◽  
Ice Cover ◽  
The North ◽  
The North Pacific

scholarly journals Reexamination of the Madden–Julian Oscillation Effect on Wintertime Sea Ice Concentrations in the North Pacific

Atmosphere ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
Ja-Young Hong ◽  
Joo-Hong Kim ◽  
Doo-Sun R. Park
Keyword(s):  
Sea Ice ◽  
Bering Sea ◽  
North Pacific ◽  
Large Scale ◽  
Madden Julian Oscillation ◽  
Phase 3 ◽  
The North ◽  
Dipole Pattern ◽  
The North Pacific ◽  
The Bering Sea

In the Pacific sector of the Arctic, a noticeable dipole pattern of the sea ice concentration (SIC) between the Sea of Okhotsk and the Bering Sea has been reported on timescales of weeks to months. The dipole pattern owes its existence to the large-scale circulation variability across the North Pacific. Meanwhile, it is well known that eastward propagating tropical convection on an intraseasonal timescale, the Madden–Julian Oscillation (MJO), forms large-scale circulation anomalies in the North Pacific through the poleward-propagating Rossby waves that are stimulated by MJO-related tropical convection, which is often manifested as a Pacific–North American teleconnection pattern. Few studies, however, have focused on the lagged MJO influence on the SIC change in the high-latitude North Pacific by poleward-propagating waves. Thus, herein, we investigated the intraseasonal SIC variations associated with the MJO phases by considering the lagged circulation response. The dipole pattern in the composite daily SIC change map between the two seas becomes apparent after approximately one week of MJO phases 3 and 7. In the Bering Sea (the Sea of Okhotsk), the SIC increases after MJO phase 3 (phase 7), while it decreases in phase 7 (phase 3). The lagged anomalous circulation pattern in the North Pacific associated with the MJO leads to SIC changes primarily through the dynamic response in 10 m winds and the resultant sea ice motion.

scholarly journals Radiocesium in the western subarctic area of the North Pacific ocean, Bering Sea, and Arctic Ocean in 2015 and 2017

Polar Science ◽  
2019 ◽  
Vol 21 ◽  
pp. 228-232 ◽  
Author(s):  
Yuichiro Kumamoto ◽  
Michio Aoyama ◽  
Yasunori Hamajima ◽  
Shigeto Nishino ◽  
Akihiko Murata ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Arctic Ocean ◽  
Bering Sea ◽  
North Pacific ◽  
North Pacific Ocean ◽  
The North ◽  
The North Pacific

Nonrandom distribution of chum salmon stocks in the Bering Sea and the North Pacific Ocean estimated using mitochondrial DNA microarray

2009 ◽  
Vol 75 (2) ◽  
pp. 359-367 ◽  
Author(s):  
Shogo Moriya ◽  
Shunpei Sato ◽  
Moongeun Yoon ◽  
Tomonori Azumaya ◽  
Shigehiko Urawa ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Dna Microarray ◽  
Bering Sea ◽  
North Pacific ◽  
Chum Salmon ◽  
North Pacific Ocean ◽  
The North ◽  
Nonrandom Distribution ◽  
The North Pacific ◽  
The Bering Sea

Revision of the genus Anophryocephalus Baylis, 1922 from pinnipeds in the Holarctic, with descriptions of Anophryocephalus nunivakensis sp.nov. and A. eumetopii sp.nov. (Tetrabothriidae) and evaluation of records from the Phocidae

1991 ◽  
Vol 69 (6) ◽  
pp. 1653-1668 ◽  
Author(s):  
Eric P. Hoberg ◽  
Ann M. Adams ◽  
Robert L. Rausch
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Pacific Basin ◽  
Genital Papilla ◽  
High Latitudes ◽  
Eumetopias Jubatus ◽  
The North ◽  
Phoca Largha ◽  
The North Pacific ◽  
North Pacific Basin

Anophryocephalus Baylis, 1922 is emended to include tetrabothriid cestodes with intricate scolices (paired auricular appendages and bothridial operculae), complex genital atria (muscular chamber ventral to the vagina; muscular pad adjacent to the aperture of the male canal), and atrophy of the dorsal osmoregulatory system. Anophryocephalus anophrys (type), A. skrjabini, and A. ochotensis are redescribed. Anophryocephalus nunivakensis sp.nov., from Phoca largha, has bothridial operculae with broad anterior apertures, an ovoid cirrus sac (57–95 μm in diameter), a ventrolaterally directed male canal (26–44 μm long in mature segments), and 26–56 testes. Anophryocephalus eumetopii sp.nov., from Eumetopias jubatus, has bothridial operculae with narrow, slitlike, diagonally directed apertures, a spheroidal cirrus sac (51–72 μm in diameter), a prominent genital papilla and ventrolaterally directed male canal (36–51 μm long in mature segments), and 32–66 testes. Postlarval ontogeny of the scolex among some species of Anophryocephalus appears similar to that known for Tetrabothrius spp., suggesting uniformity in morphogenesis of the holdfast among the Tetrabothriidae. Anophryocephalus spp. are typical parasites of pinnipeds in the Holarctic, and contrary to previous reports, A. skrjabini and A. ochotensis are exclusively parasites of Phoca spp. and Eumetopias jubatus, respectively, at high latitudes in the North Pacific basin and Bering Sea.

Ekman Transport and Zooplankton Concentration in the North Pacific Ocean

1967 ◽  
Vol 24 (3) ◽  
pp. 581-594 ◽  
Author(s):  
W. Percy Wickett
Keyword(s):  
Surface Water ◽  
Bering Sea ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Ekman Transport ◽  
Sampling Area ◽  
The North ◽  
Western Bering Sea ◽  
North And South ◽  
The North Pacific

Annual concentrations of zooplankton off California varied directly, and concentrations in the western Bering Sea varied indirectly with calculated southerly components of Ekman transport in the previous year at 50°N,140°W. This point is in the area in which surface subarctic water and the deeper currents divide north and south. The underlying geostrophic flow requires approximately 1 year to reach each downstream sampling area. Summer concentrations of zooplankton at Ocean Station P, 50°N,145°W, varied with southerly and westerly components at 50°N,160°W during the previous winter. Fifty to sixty per cent of the variance of the annual concentration in zooplankton appears to be due to advection of surface water.

Decadal changes in growth and recruitment of Pacific halibut (Hippoglossus stenolepis)

1999 ◽  
Vol 56 (2) ◽  
pp. 242-252 ◽  
Author(s):  
William G Clark ◽  
Steven R Hare ◽  
Ana M Parma ◽  
Patrick J Sullivan ◽  
Robert J Trumble
Keyword(s):  
North Pacific ◽  
Regime Shift ◽  
Assessment Model ◽  
Individual Growth ◽  
Climate Regime ◽  
Climate Regime Shift ◽  
The North ◽  
Pacific Halibut ◽  
Hippoglossus Stenolepis ◽  
The North Pacific

Since the climate regime shift of 1976-1977 in the North Pacific, the individual growth of Pacific halibut (Hippoglossus stenolepis) has decreased dramatically in Alaska but not in British Columbia. Recruitment has increased dramatically in both areas. The decrease in age-specific vulnerability to commercial longline gear resulted in a persistent underestimation of incoming recruitment by the age-structured assessment method (CAGEAN) that was used to assess the stock. This problem has been corrected by adding temporal trends in growth and fishery selectivity to the assessment model. The recent sustained high level of recruitment at high levels of spawning biomass has erased the previous appearance of strong density dependence in the stock-recruitment relationship and prompted a reduction in the target full-recruitment harvest rate from 30-35 to 20-25%. The climate regime shift affected a number of other stocks of vertebrates and invertebrates in the North Pacific. While the general oceanographic changes have now been identified, the specific biological mechanisms responsible for the observed changes have not.

Sign in / Sign up

Export Citation Format

Share Document