North Pacific Intermediate Water in the Kuroshio/Oyashio Mixed Water Region

1995 ◽  
Vol 25 (4) ◽  
pp. 475-501 ◽  
Author(s):  
Lynne D. Talley ◽  
Yukata Nagata ◽  
Masahiko Fujimura ◽  
Takanori Iwao ◽  
Tokihiro Kono ◽  
...  
Keyword(s):  
North Pacific ◽  
Intermediate Water ◽  
North Pacific Intermediate Water ◽  
Mixed Water Region ◽  
Water Region ◽  
The Kuroshio ◽  
Mixed Water

scholarly journals Effect of Decadal Kuroshio Extension Jet and Eddy Variability on the Modification of North Pacific Intermediate Water

2011 ◽  
Vol 41 (3) ◽  
pp. 503-515 ◽  
Author(s):  
Bo Qiu ◽  
Shuiming Chen
Keyword(s):  
North Pacific ◽  
North Pacific Ocean ◽  
Kuroshio Extension ◽  
Mesoscale Eddy ◽  
Dynamic State ◽  
Intermediate Water ◽  
North Pacific Intermediate Water ◽  
Mixed Water Region ◽  
Water Region ◽  
Mixed Water

Abstract Salinity modifications in the North Pacific Intermediate Water (NPIW) core layer of 26.7–26.8 σθ in the western North Pacific Ocean are investigated using temperature–salinity data from available profiling float and hydrographic measurements in 2002–09. During 2002–05, when the Kuroshio Extension (KE) jet was intense and zonally elongated, coherent positive salinity anomalies appeared along the inflow KE jet southeast of Japan and in the downstream Mixed Water region east of 152°E. Broad-scale negative salinity anomalies were detected south of the KE jet and in the upstream Mixed Water region west of 152°E. The signs of these observed salinity anomalies were reversed in 2006–09, when the KE jet transitioned to a weakened and zonally contracted dynamic state. By adopting an isopycnal advection–diffusion model and conducting model runs with the time-dependent advective field inferred from the eddy-resolving satellite altimeter sea surface height data, it is found that the observed salinity anomalies are oscillatory in nature and are determined not only by the decadally varying KE jet itself but also by mesoscale eddy signals that modulate temporally and longitudinally along the path of the KE jet.

scholarly journals Evolution and Structure of the Kuroshio Extension Front in Spring 2019

2020 ◽  
Vol 8 (7) ◽  
pp. 502
Author(s):  
Jiahao Wang ◽  
Kefeng Mao ◽  
Xi Chen ◽  
Kelan Zhu
Keyword(s):  
Saline Water ◽  
Kuroshio Extension ◽  
Intermediate Water ◽  
North Pacific Intermediate Water ◽  
Water Region ◽  
Diffusive Convection ◽  
Thermohaline Intrusions ◽  
Salt Fingering ◽  
The Kuroshio ◽  
Kuroshio Extension Front

Satellite data products and high-resolution in situ observations were combined to investigate the evolution and structure of the Kuroshio Extension Front in Spring 2019. The former reveals the variation of the front is influenced by the northward movement of the Kuroshio Extension through transporting warm and saline water to a cold and brackish water region. The latter indicates steep upward slopes of the isopycnals, tilting northward in the frontal zone, as well as several ~300 m thick blobs of North Pacific Intermediate Water between 26.25 and 26.75 kg/m3, where conspicuous thermohaline intrusions occur. Further analysis indicates these thermohaline intrusions prefer to alternate salt fingering and diffusive convection interfaces, and are affected by strong shears.

scholarly journals Meridional transport of the North Pacific Intermediate Water in the Kuroshio-Oyashio Interfrontal Zone

2001 ◽  
Vol 28 (18) ◽  
pp. 3445-3448 ◽  
Author(s):  
Hiroshi Yoshinari ◽  
Ichiro Yasuda ◽  
Shin-ichi Ito ◽  
Eric Firing ◽  
Yutaka Matsuo ◽  
...  
Keyword(s):  
North Pacific ◽  
Intermediate Water ◽  
Meridional Transport ◽  
North Pacific Intermediate Water ◽  
The North ◽  
The Kuroshio ◽  
The North Pacific

scholarly journals Radiocarbon in the Water Column of the Southwestern North Pacific Ocean—24 Years After Geosecs

Radiocarbon ◽  
2004 ◽  
Vol 46 (2) ◽  
pp. 583-594 ◽  
Author(s):  
Pavel P Povinec ◽  
Takafumi Aramaki ◽  
George S Burr ◽  
A J Timothy Jull ◽  
Laval Liong Wee Kwong ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Kuroshio Extension ◽  
Kuroshio Current ◽  
Intermediate Water ◽  
North Pacific Intermediate Water ◽  
Deep Waters ◽  
Marine Radioactivity ◽  
The Kuroshio

In the framework of the Worldwide Marine Radioactivity Studies (WOMARS) project, water profile samples for radiocarbon measurements were taken during the IAEA'97 cruise at 10 stations in the southwestern North Pacific Ocean. While 14C concentrations were rapidly decreasing from the surface (Δ14C about 100‰) down to about 800 m at all visited stations (Δ14C about −200‰), the concentrations below 1000 m were almost constant. Some stations were in proximity to the GEOSECS stations sampled in 1973; thus, 14C profiles could be compared after a 24-yr interval. Generally, 14C concentrations had decreased in surface waters (by 50–80‰) and increased (by about the same amount) in intermediate waters when compared with GEOSECS data. In deep waters (below 1000 m), the observed 14C concentrations were similar to GEOSECS values. The bomb-produced 14C inventory had increased by more than 20% over the 24 yr from 1973 to 1997 and was estimated to be about (32 ± 5) 1012 atom m-2, with an annual 14C flux of (1.3 ± 0.3) 1012 atom m-2 yr-1. The results suggest that bomb-produced 14C has been advected northwards by the Kuroshio Current and the Kuroshio Extension and stored in the intermediate layer as North Pacific Intermediate Water.

Sign in / Sign up

Export Citation Format

Share Document