Orbital- and millennial-scale paleoceanographic changes in the north-eastern Japan Basin, East Sea/Japan Sea during the late Quaternary

2011 ◽  
Vol 27 (3) ◽  
pp. 328-335 ◽  
Author(s):  
Boo-Keun Khim ◽  
Ken Ikehara ◽  
Tomohisa Irino
Keyword(s):  
Late Quaternary ◽  
Japan Sea ◽  
East Sea ◽  
Japan Basin ◽  
The North ◽  
North Eastern ◽  
Eastern Japan ◽  
Millennial Scale

scholarly journals Late Quaternary climate change in the north-eastern highlands of Ethiopia: A high resolution 15,600 year diatom and pigment record from Lake Hayk

2018 ◽  
Vol 202 ◽  
pp. 166-181 ◽  
Author(s):  
Katie L. Loakes ◽  
David B. Ryves ◽  
Henry F. Lamb ◽  
Frank Schäbitz ◽  
Michael Dee ◽  
...  
Keyword(s):  
Climate Change ◽  
High Resolution ◽  
Late Quaternary ◽  
The North ◽  
Quaternary Climate ◽  
North Eastern ◽  
Eastern Highlands

scholarly journals High-salinity intermediate water of the Japan Sea in the eastern Japan Basin

2001 ◽  
Vol 106 (C6) ◽  
pp. 11437-11450 ◽  
Author(s):  
Tatsuro Watanabe ◽  
Mitsuyuki Hirai ◽  
Haruya Yamada
Keyword(s):  
High Salinity ◽  
Japan Sea ◽  
Intermediate Water ◽  
Japan Basin ◽  
The Japan Sea ◽  
Eastern Japan

Improving Resource Assessment of Wave Power Based on Spectral Wave Model

2014 ◽  
Author(s):  
Takuji Waseda ◽  
Sho Asaumi ◽  
Keiji Kiyomatsu
Keyword(s):  
Wave Model ◽  
Resource Assessment ◽  
Wave Period ◽  
Wave Power ◽  
Model Errors ◽  
Significant Wave ◽  
The North ◽  
Spectral Wave Model ◽  
North Eastern ◽  
Eastern Japan

Epistemic uncertainties of wave power estimation based on spectral wave model were assessed utilizing the community wave model WW3 of NOAA. A four tiered nested model was constructed covering the Pacific Ocean, the sea around Japan, the North-Eastern Japan and Kamaishi regional model at 100km, 10km, 1km and 100m resolutions respectively. The sensitivity of the model output to four wind products (NCEP-GFS, NCEP-CFSR, GSM/JMA, ERA-interim/ECWMF) was tested; the wave model outputs as well as wind products were validated against observations of NDBC buoys, JKEO/JAMSTEC buoy, TAO array and NOWPHAS buoy along the north-eastern Japan. The differences of the estimations using four wind products were relatively small whereas model errors were spatially inhomogeneous. The dependence on grid-resolution was relatively small at depth 100m or so. On the other hand, the modeled significant wave period had a large bias from the observation because of the inconsistency in the spectral moment used to estimate the significant wave period. The energy period (T-1,0) was 5% larger than the period from WW3 (T-0.5,0) and 20% larger than the period from NDBC (T0,2). The difference of wave period, dependent on the spectral shape and location, are often overlooked despite their significant impact on the resource estimate.

scholarly journals Tracing the Atmospheric Input of Seawater-Dissolvable Pb Based on the Budget of 210Pb in the East Sea (Japan Sea)

2021 ◽  
Vol 8 ◽  
Author(s):  
Hojong Seo ◽  
Guebuem Kim ◽  
Young-Il Kim ◽  
Intae Kim
Keyword(s):  
Residence Time ◽  
North Atlantic ◽  
Japan Sea ◽  
East Sea ◽  
Balance Model ◽  
Atmospheric Input ◽  
Asian Continent ◽  
The North ◽  
Naturally Occurring ◽  
The North Pacific

In order to determine the atmospheric input of 210Pb and seawater-dissolvable Pb in the East Sea (Japan Sea), we measured the concentrations of total 210Pb and dissolved Pb (<0.2 μm) in seawater and 210Pb and 226Ra in sinking particles. The East Sea is deep (∼3700 m) and enclosed by surrounding continents except for the shallow sills (<150 m). Since the East Sea is located off the East Asian continent under the westerlies, the concentrations of 210Pb and dissolved Pb in this sea are significantly affected by terrestrial sources through the atmosphere. The vertical profiles of total 210Pb and dissolved Pb generally showed a surface maximum and then decreased with depth. The concentrations of dissolved Pb in the surface water were 2 and 3 times higher than those in the North Pacific and North Atlantic Oceans, respectively. Using an independent box model (upper 1000 m or 2000 m), we estimate the atmospheric input of 210Pb to be 1.46 ± 0.25 dpm cm−2 y −1, which is within the range of published results from the land-based sites (0.44–4.40 dpm cm−2 y −1) in South Korea, China, and Japan. Based on this flux, the residence time of total 210Pb in the East Sea is calculated to be approximately 7.1 ± 1.6 years, which is twice lower than the previous estimation. Combining the residence time of 210Pb and the inventory of dissolved Pb, the atmospheric input of seawater-dissolvable Pb is estimated to be 0.98 ± 0.28 nmol cm−2 y −1. This flux is approximately 25% of the Pb flux through the wet deposition (acid-leachable fraction). Thus, our results suggest that the flux and fate of atmospheric Pb in the ocean can be successfully determined using an accurate mass balance model of naturally occurring 210Pb.

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