Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Takafumi Aramaki"'
Publikováno v:
Water, Vol 12, Iss 8, p 2184 (2020)
To better understand the behavior of water mass beneath the Tsushima Warm Current (TWC), we use the vertical cross-sections of potential temperature, salinity and dissolved oxygen in the Japan Sea obtained by the T/V Oshoro Maru of the Hokkaido Unive
Externí odkaz:
https://doaj.org/article/0c962a3062b34a239f113787215ccd68
Autor:
Masayo Minami, Yuichiro Kumamoto, Takafumi Aramaki, Yoko Saito-Kokubu, Hiroko Handa, Hiroshi A. Takahashi, S Itoh
Publikováno v:
Radiocarbon. 61:1879-1887
We studied a suitable procedure for preparing of water samples used in radiocarbon intercomparisons involving dissolved inorganic carbon (DIC). The water samples must have inter-batch consistency and stable 14C concentrations and no sterilizing agent
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 455:195-200
The preservation of unpoisoned water samples was investigated by radiocarbon analysis with five kinds of natural waters. Although refrigerated and shielded from light, the unpoisoned samples underwent carbon isotopic changes, even after short periods
Autor:
Seiko Kushibashi, Hitoshi Mukai, Y Tohjima, T Kobayashi, S Nakaoka, Yukio Terao, Takafumi Aramaki, Yumi Osonoi
Publikováno v:
Radiocarbon. 61:1367-1375
Surface radiocarbon (Δ14C) in the North Pacific has been monitored using a commercial volunteer observation ship since the early 2000s. Here we report the temporal and spatial variations in Δ14C in the summer surface water when the surface ocean is
Publikováno v:
Water
Volume 12
Issue 8
Water, Vol 12, Iss 2184, p 2184 (2020)
Volume 12
Issue 8
Water, Vol 12, Iss 2184, p 2184 (2020)
To better understand the behavior of water mass beneath the Tsushima Warm Current (TWC), we use the vertical cross-sections of potential temperature, salinity and dissolved oxygen in the Japan Sea obtained by the T/V Oshoro Maru of the Hokkaido Unive
Publikováno v:
Marine Environmental Research. 137:206-224
In bottom-sediment samples collected in 2012 from a coastal strip (∼30 km × 120 km) off the Fukushima Daiichi Nuclear Power Plant (FDNPP), radiocesium activity concentrations were generally higher south of the FDNPP, with high activity concentrati
Publikováno v:
Journal of Environmental Radioactivity. 182:151-156
We examined the spatial distributions of 226Ra, 228Ra, 134Cs, and 137Cs concentrations (activities) in seawater off the western and southern Korean Peninsula in July 2014. Radium-228 (and 226Ra) concentrations in water samples varied widely from 5 to
Autor:
Takafumi Aramaki, Tomoharu Senjyu
Publikováno v:
Journal of Oceanography. 73:235-247
The transport of Japan Basin Bottom Water (JBBW) into the Yamato Basin in the Japan Sea is an important boundary condition for the modification of the abyssal water mass in the Yamato Basin. To estimate the volume transport of JBBW, two year-long obs
Publikováno v:
Marine environmental research. 140
We conducted fisheries-independent bottom-trawl surveys along the coast of Fukushima, Japan, from 2013 to 2017 to study the megabenthic community structure after the 2011 earthquake, tsunami, and nuclear disaster. Although we observed no substantial
Autor:
Yuichiroh Morita, Tohru Hirawake, Takafumi Aramaki, Jun Nishioka, Nanako Hioki, Naoto Ebuchi, Kenshi Kuma, Ryohei Sasayama, Yutaka Isoda, Tomohiro Nakamura, Keiri Imai
Publikováno v:
Journal of Oceanography. 70:377-387
In the southwestern Okhotsk Sea, the cold water belt (CWB) is frequently observed on satellite images offshore of the Soya Warm Current flowing along the northeastern coast of Hokkaido, Japan, during summertime. It has been speculated that the CWB is