Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

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Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Variations in the Central Mode Water in the North Pacific as a manifestation of the Pacific Decadal Oscillation

  Iwasaka, Naoto, F. Kobashi, and Y. Kawai , 2024.07

  Journal of Oceanography

  DOI

• Influence of North Pacific subtropical mode water variability on the surface mixed layer through the heaving of the upper thermocline on decadal timescales

  Fumiaki Kobashi, Norihisa Usui, Nanami Akimoto, Naoto Iwasaka, Toshio Suga, Eitarou Oka , 2023.01

  Journal of Oceanography

  DOI

• Argo Data 1999–2019: Two Million Temperature-Salinity Profiles and Subsurface Velocity Observations From a Global Array of Profiling Floats

  Wong APS, Wijffels SE, Riser SC, Pouliquen S, Hosoda S, Roemmich D, Gilson J, Johnson GC, Martini K, Murphy DJ, Scanderbeg M, Bhaskar TVSU, Buck JJH, Merceur F, Carval T, Maze G, Cabanes C, André X, Poffa N, Yashayaev I, Barker PM, Guinehut S, Belbéoch M, Ignaszewski M, Baringer MO, Schmid C, Lyman JM, McTaggart KE, Purkey SG, Zilberman N, Alkire MB, Swift D, Owens WB, Jayne SR, Hersh C, Robbins P, West-Mack D, Bahr F, Yoshida S, Sutton PJH, Cancouët R, Coatanoan C, Dobbler D, Juan AG, Gourrion J, Kolodziejczyk N, Bernard V, Bourlès B, Claustre H, D'Ortenzio F, Le Reste S, Le Traon P-Y, Rannou J-P, Saout-Grit C, Speich S, Thierry V, Verbrugge N, Angel-Benavides IM, Klein B, Notarstefano G, Poulain P-M, Vélez-Belchí P, Suga T, Ando K, Iwasaska N, Kobayashi T, Masuda S, Oka E, Sato K, Nakamura T, Sato K, Takatsuki Y, Yoshida T, Cowley R, Lovell JL, Oke PR, van Wijk EM, Carse F, Donnelly M, Gould WJ, Gowers K, King BA, Loch SG, Mowat M, Turton J, Rama Rao EP, Ravichandran M, Freeland HJ, Gaboury I, Gilbert D, Greenan BJW, Ouellet M, Ross T, Tran A, Dong M, Liu Z, Xu J, Kang K, Jo H, Kim S-D and Park H-M , 2020.09

  Frontiers in Marine Science

  DOI

• Decadal-scale variability of the North Pacific subtropical mode water and its influence on the pycnocline observed along 137°E

  Kobashi, F., T. Nakano, N. Iwasaka, and T. Ogata , 2020

  Journal of Oceanography

  OACIS Paper URL

• Small meanders of the Kuroshio Extension and associated northward spreading of warm water: Three-vessel simultaneous observations and an eddy-resolving ocean model simulation.

  Fumiaki Kobashi, Yukino Onikata, Naoto Iwasaka, Yoshimi Kawai, Eitarou Oka, Kazuyuki Uehara, Shin-Ichi Ito, Minoru Odamaki, and Hideharu Sasaki , 2016.10

  J. Geophys. Res. – Oceans

  OACIS Paper URL

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Books 【 display / non-display 】

Books 【 display / non-display 】

• 最新　水産ハンドブック

  岩坂直人 , 2012.10

  講談社サイエンティフィク , 第1章第3節第2項B生息環境a水温・塩分・流動 , 53-57

• 2005/06年 日本の寒冬・豪雪

  大野祐子・岩坂直人 , 2007.08

  日本気象学会 , 第17章　2005/2006年冬期における北太平洋中緯度域の海洋混合層変動について , 175-184

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Study on the subduction in the Central Mode Water formation region in the North Pacific

  Project Period (FY)： 2023/04  -  2026/03  Investigator(s): 岩坂直人

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  23K03490 

• A study on possible roles of the Central Mode Water on the decadal oscillations in the North Pacific

  Project Period (FY)： 2020/04  -  2023/03  Investigator(s): 岩坂 直人

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  20K04060 

• Inter-annual variations of the ocean mixed layer in the region south of the Kuroshio Extension

  Project Period (FY)： 2016/04  -  2019/03  Investigator(s): Iwasaka Naoto

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  16K05553 

  We investigated inter-annual variations of the oceanic winter mixed layer in the region south of the Kuroshio Extension using FORA-WNP30, which is a reanalysis product of a eddy resolving ocean model. After quality evaluations of the reanalysis product, we revealed inter-annual variations of the depth, temperature and salinity of the mixed layer in the region.　We confirmed the facts that the surface heat flux anomaly was a major controlling factor of the mixed layer variations in the region in winter before 1995, which had been pointed out by Iwamaru et al. (2010), which was conducted using hydrography data only. Our study indicated that strength of the stratification of the surface layer in the previous autumn had dominated the winter mixed layer depth After 1995 winter while the contribution of surface heat flux had become smaller.

• 黒潮続流南方海域混合層長期変動の研究

  Project Period (FY)： 2011/06  -  2013/03 

  Grant-in-Aid for Scientific Research on Innovative Areas  Principal Investigator  23106502 

• 北太平洋亜熱帯域のサブダクション過程およびその経年変動のメカニズム解明

  Project Period (FY)： 2009/04  -  2012/03 

  Grant-in-Aid for Scientific Research(B)  Co-Investigator  21340133 

Lesson Subject 【 display / non-display 】

Lesson Subject 【 display / non-display 】