Surface circulation in Sagami Bay: the response to variations of the Kuroshio axis

1989 ◽  
Vol 45 (5) ◽  
pp. 310-320 ◽  
Author(s):  
Shizuo Iwata ◽  
Masaji Matsuyama
Keyword(s):  
Sagami Bay ◽  
Surface Circulation ◽  
The Kuroshio ◽  
Kuroshio Axis

scholarly journals Short-period Fluctuations of Surface Circulation in Sagami Bay Induced by the Kuroshio Warm Water Intrusion through Ooshima West Channel.

2003 ◽  
Vol 12 (2) ◽  
pp. 167-184 ◽  
Author(s):  
Hirofumi Hinata ◽  
Masashi Miyano ◽  
Tetsuo Yanagi ◽  
Takashi Ishimaru ◽  
Tomoyuki Kasuya ◽  
...  
Keyword(s):  
Warm Water ◽  
Sagami Bay ◽  
Water Intrusion ◽  
Surface Circulation ◽  
Short Period ◽  
The Kuroshio

Short-term flow and water temperature fluctuations in Sagami Bay, Japan, associated with variations of the Kuroshio during the non-large-meander path

2012 ◽  
Vol 105 ◽  
pp. 47-60 ◽  
Author(s):  
Daisuke Takahashi ◽  
Akihiko Morimoto ◽  
Tetsuya Nakamura ◽  
Takuji Hosaka ◽  
Yoshihisa Mino ◽  
...  
Keyword(s):  
Water Temperature ◽  
Temperature Fluctuations ◽  
Large Meander ◽  
Short Term ◽  
Sagami Bay ◽  
The Kuroshio

Statistical Analysis of Surface Circulation in Sagami Bay Using High-Frequency (HF) Radar

2020 ◽  
pp. 51-65
Author(s):  
Haruka Nakano ◽  
Mai Matsusaka ◽  
Issei Nishimura ◽  
Hiroyuki Yoritaka ◽  
Masao Nemoto ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
High Frequency ◽  
Hf Radar ◽  
Sagami Bay ◽  
Surface Circulation

Shifts of the Kuroshio axis over the last 20 000 years

1998 ◽  
Vol 43 (12) ◽  
pp. 1053-1056 ◽  
Author(s):  
Jian Zhimin ◽  
Y. Saito ◽  
Wang Pinxian ◽  
Li Baohua ◽  
Chen Ronghua
Keyword(s):  
The Kuroshio ◽  
Kuroshio Axis

scholarly journals Variability of Kuroshio Surface Axis Northeast of Taiwan Island Derived from Satellite Altimeter Data

2020 ◽  
Vol 12 (7) ◽  
pp. 1059
Author(s):  
Zhanpeng Zhuang ◽  
Quanan Zheng ◽  
Xi Zhang ◽  
Guangbing Yang ◽  
Xinhua Zhao ◽  
...  
Keyword(s):  
Altimeter Data ◽  
Spatial And Temporal Variability ◽  
Satellite Altimeter ◽  
Straight Path ◽  
Typical Period ◽  
Taiwan Island ◽  
The Impact ◽  
The Kuroshio ◽  
Satellite Altimeter Data ◽  
Kuroshio Axis

The spatial and temporal variability of the Kuroshio surface axis northeast of Taiwan Island is investigated using 24 years of surface geostrophic currents derived from satellite altimeter data from 1993 to 2016. The Kuroshio surface axis is derived by an extraction method with three selected parameters, including the length of the subsidiary line, the intervals between two adjacent points, and the distance between the two adjacent subsidiary lines. The empirical mode decomposition analysis on the 24-year Kuroshio axes reveals that the mean periods of intra-seasonal and inter-annual variability, which are the two dominant components, are about 3.2 months and 1.3 years, respectively. The self-organizing map analysis reveals that the variation of Kuroshio axis northeast of Taiwan Island has four best matching unit (BMU) patterns: straight-path (BMUS), meandering-path (BMUM) and two transition stages (BMUT1 and BMUT2). The straight-path pattern shows strong seasonality: more likely occurring in summer. The meandering-path pattern is less frequent than straight-path pattern. During a typical period from November 26, 2012 to January 27, 2013, which is chosen as an independent example, the analysis on the satellite altimeter and sea surface temperature data shows that the patterns of the Kuroshio axis change successively in order of BMUT1→BMUM→BMUT2→BMUS, i.e., the Kuroshio axis migrates from the meandering-path to the straight-path pattern. During the typical period the warm water intrusion and a mesoscale eddy occur at the second stage corresponding to BMUM and migrate northwestward gradually at the last two stages corresponding to BMUT2 and BMUS. The transient order appears only during this typical period but it is not common for the whole study period. The monthly mean relatively vorticity is calculated and analyzed to evaluate the impact of the eddies on the Kuroshio surface axis variability, the results show that the anticyclonic (cyclonic) eddies can promote the Kuroshio surface axis to present the meandering-path (straight-path) pattern because of the potential vorticity conservation. The impacts of the anticyclonic eddies and the cyclonic eddies on the variability of the Kuroshio surface axis are opposite. The long-term day-to-day detection contributes to improving understanding the variability of Kuroshio surface axis northeast of Taiwan Island.

Distribution of viable marine bacteria in neritic seawater around Japan

1980 ◽  
Vol 26 (3) ◽  
pp. 318-323 ◽  
Author(s):  
Kazuhiro Kogure ◽  
Ushio Simidu ◽  
Nobuo Taga
Keyword(s):  
Organic Matter ◽  
Viable Count ◽  
Tokyo Bay ◽  
Natural Seawater ◽  
Sagami Bay ◽  
Direct Count ◽  
Free Living ◽  
The Kuroshio ◽  
Kuroshio Region ◽  
Living Bacteria

The direct viable count (DVC) method of determining the number of living bacteria in natural seawater was applied to samples collected from areas around Japan ranging from polluted to oligotrophic. In summer, the DVC comprised 1.5–39.8% (mean, 11.2%) of the total direct count (TDC) in Tokyo Bay, which was highly eutrophic. In offshore areas (Sagami Bay and the Kuroshio region), the percentages ranged from 0.7 to 7.9 (mean, 2.8%). In winter, slightly higher percentages were observed in Sagami Bay. The majority of DVC cells were free-living. The distribution of bacteria correlated closely with particulate or dissolved organic matter.

scholarly journals Flow variability with periods of 50-70 days in Sagami Bay, Japan during the offshore non-large-meander path of the Kuroshio

2011 ◽  
Vol 20 (3-4) ◽  
pp. 59-83
Author(s):  
Daisuke Takahashi ◽  
Akihiko Morimoto ◽  
Tetsuya Nakamura ◽  
Takuji Hosaka ◽  
Yoshihisa Mino ◽  
...  
Keyword(s):  
Large Meander ◽  
Sagami Bay ◽  
Flow Variability ◽  
The Kuroshio
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