Výsledky vyhledávání - "Masaaki Wakatsuchi"

Iron and nutrient dynamics along the East Kamchatka Current, western Bering Sea Basin and Gulf of Anadyr

Autor: Alexey Shcherbinin, Humio Mitsudera, Masaaki Wakatsuchi, Toru Hirawake, Jun Nishioka, Yuri N. Volkov, Daiki Nomura, Kazuya Ono, Aiko Murayama, Youhei Yamashita, Ichiro Yasuda, Naoto Ebuchi

Publikováno v: Progress in Oceanography. 198:102662

Analysis of observed iron (Fe) and nutrient data from the East Kamchatka Current (EKC) in the western Bering Sea, including the Kamchatka Basin, northeastern shelf slope, and Gulf of Anadyr, in the summers of 2014 and 2018 was conducted. The results

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::64d0371f1f37391ae011bf5c2be44382
https://doi.org/10.1016/j.pocean.2021.102662

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Hydrographic observations by instrumented marine mammals in the Sea of Okhotsk

Autor: Vigan Mensah, Takuya Nakanowatari, Kaoru Hattori, Humio Mitsudera, Yoko Mitani, Masaaki Wakatsuchi, Fabien Roquet, Mari Kobayashi, Kay I. Ohshima, Yasunori Sakurai

Publikováno v: Polar Science. 13:56-65

The Sea of Okhotsk is a challenging environment for obtaining in situ data and satellite observation in winter due to sea ice cover. In this study, we evaluated the validity of hydrographic observations by marine mammals (e.g., seals and sea lions) e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c214cde3efdd74ab94dd0d67f50866de
https://doi.org/10.1016/j.polar.2017.06.001

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Importance of E kman transport and gyre circulation change on seasonal variation of surface dissolved iron in the western subarctic N orth P acific

Autor: Tomohiro Nakamura, Takuya Nakanowatari, Humio Mitsudera, Keisuke Uchimoto, Masaaki Wakatsuchi, Jun Nishioka

Publikováno v: Journal of Geophysical Research: Oceans. 122:4364-4391

Iron (Fe) is an essential nutrient for marine phytoplankton and it constitutes an important element in the marine carbon cycle in the ocean. This study examined the mechanisms controlling seasonal variation of dissolved Fe (dFe) in the western subarc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::234a85b1ce6ae247a7350298ebe22b43
https://doi.org/10.1002/2016jc012354

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Multidecadal-Scale Freshening at the Salinity Minimum in the Western Part of North Pacific : Importance of Wind-Driven Cross-Gyre Transport of Subarctic Water to the Subtropical Gyre

Autor: Kay I. Ohshima, Humio Mitsudera, Tatsuo Motoi, Masaaki Wakatsuchi, Ichiro Ishikawa, Takuya Nakanowatari

Publikováno v: Journal of Physical Oceanography. 45(4):988-1008

Using oceanographic observations and an eddy-resolving ice–ocean coupled model simulation from 1955 to 2004, the effects of the wind-driven ocean circulation change that occurred in the late 1970s during multidecadal-scale freshening of the North P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39e9b9b75c0bae8bb5e0103d4de2355c
http://hdl.handle.net/2115/60076

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Overturning circulation that ventilates the intermediate layer of the Sea of Okhotsk and the North Pacific: The role of salinity advection

Autor: Tomohiro Nakamura, Junji Matsuda, Yuichiro Sasajima, Hiroyasu Hasumi, Humio Mitsudera, Masaaki Wakatsuchi

Publikováno v: Journal of Geophysical Research: Oceans. 120(3):1462-1489

Dense Shelf Water (DSW) formation in the northwestern continental shelf of the Sea of Okhotsk is the beginning of the lower limb of the overturning circulation that ventilates the intermediate layer of the North Pacific Ocean. The upper limb consisti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7ccb3b59470dd2a04b9425a247c2cec
http://hdl.handle.net/2115/80686

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Causes of the Multidecadal-Scale Warming of the Intermediate Water in the Okhotsk Sea and Western Subarctic North Pacific

Autor: Hiroyasu Hasumi, Masaaki Wakatsuchi, Takuya Nakanowatari, Kay I. Ohshima, Hiroki Uehara, Humio Mitsudera, Tomohiro Nakamura, Keisuke Uchimoto

Publikováno v: Journal of Climate. 28:714-736

Causes of the multidecadal-scale warming of the intermediate water in the Okhotsk Sea and the western subarctic North Pacific during 1980–2008 are investigated using an ice–ocean coupled model with interannually varying atmospheric forcing. A hin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b297c92048c88fd4a1684f3d34e78a29
https://doi.org/10.1175/jcli-d-14-00172.1

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Simulation of high concentration of iron in dense shelf water in the Okhotsk Sea

Autor: Jun Nishioka, Keisuke Uchimoto, Kazuhiro Misumi, Tomohiro Nakamura, Humio Mitsudera, Masaaki Wakatsuchi, Daisuke Tsumune

Publikováno v: Progress in Oceanography. 126:194-210

An ocean general circulation model coupled with a simple biogeochemical model was developed to simulate iron circulation in and around the Sea of Okhotsk. The model has two external sources of iron: dust iron at the sea surface and sedimentary iron a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b43054eb0dfdc5dffccdc26bd84b0589
http://hdl.handle.net/2115/56621

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How does the Amur River discharge flow over the northwestern continental shelf in the Sea of Okhotsk?

Autor: Ayumi Fujisaki, Masaaki Wakatsuchi, Jia Wang, Humio Mitsudera

Publikováno v: Progress in Oceanography. 126:8-20

The paths of the Amur River discharge on the continental shelf in the Sea of Okhotsk are still unknown despite their significance in transporting dissolved and particulate iron. In this study, we conduct a coupled ice-ocean simulation for the norther

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76605e88317336a6fc0f766953720c49
https://doi.org/10.1016/j.pocean.2014.04.028

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Remotely propagating salinity anomaly varies the source of North Pacific ventilation

Autor: Hiroki Uehara, Masaaki Wakatsuchi, Andrey A. Kruts, Yuri N. Volkov, Tomohiro Nakamura, Humio Mitsudera

Publikováno v: Progress in Oceanography. 126:80-97

The dense shelf water (DSW) produced in the Sea of Okhotsk causes the deepest ventilation in the North Pacific and plays a key role in overturning to the depth of intermediate layers. Salinity determines the density of DSW in cold seas such as this.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db5291d9789775f72ef02bfa260b229f
https://doi.org/10.1016/j.pocean.2014.04.016

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Effects of temporal variation in tide-induced vertical mixing in the Kuril Straits on the thermohaline circulation originating in the Okhotsk Sea

Autor: Humio Mitsudera, Tomohiro Nakamura, Keisuke Uchimoto, Masaaki Wakatsuchi, Yuuki Takeuchi

Publikováno v: Progress in Oceanography. 126:135-145

Tidally induced vertical mixing is important for thermohaline circulation. Previous estimations of tidal mixing have aimed to obtain time-averaged values, and ocean general circulation models (OGCMs) typically parameterize such mixing using a tempora

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72dcf736add3dec4980a11c8d509a898
https://doi.org/10.1016/j.pocean.2014.05.007

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