Behavior of Kuroshio warm-core rings and their role in material transport

2010 Fiscal Year Final Research Report

• Project/Area Number: 21740340
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: The University of Tokyo
• Principal Investigator: ITOH Sachihiko The University of Tokyo, 大気海洋研究所, 准教授 (80345058)
• Project Period (FY): 2009 – 2010
• Keywords: 暖水塊 / 中規模渦 / 物質輸送

Research Abstract

Analyses on various archived data and in situ observations were conducted to clarify behavior of Kuroshio warm-core rings and their role in material transport. Based on satellite sea surface height data, we quantified the distribution and characteristics of various mesoscale eddies in the Kuroshio-Oyashio extension region. Invistigation on vertical profiles near the center of the rings revealed the occurrence of cold and fresh water anomalies in the intermediate layer below the warm water of the rings.

Research Products

• [Journal Article] Evolution and Decay of a Warm-Core Ring within the Western Subarctic Gyre of the North Pacific, as Observed by Profiling Floats (2011)
  • Author(s): S.Itoh Y.Shimizu, S-i.Ito, I.Yasuda
  • Journal Title: J.Oceanogr. 67 Pages: DOI10.1007/s10872-011-0027-2
  • Peer Reviewed
• [Journal Article] Environmental variability and growth histories of larval Japanese sardine (Sardinops melanostictus) and Japanese anchovy (Engraulis japonicus) near the frontal area of the Kuroshio (2011)
  • Author(s): Itoh, S., T.Saruwatari, H.Nishikawa, I.Yasuda, K.Komatsu, A.Tsuda, T.Scion, M.Shimizu
  • Journal Title: Fish.Oceanogr. 20 Pages: 114-124
  • Peer Reviewed
• [Journal Article] Water mass structure of warm and cold anticyclonic eddies in the western boundary region of the subarctic North Pacific (2010)
  • Author(s): Itoh, S., I.Yasuda
  • Journal Title: J.Phys.Oceanogr. 40 Pages: 2624-2642
  • Peer Reviewed
• [Journal Article] Fine- and microstructure observations in the Urup Strait, Kuril Islands, during August of 2006 (2010)
  • Author(s): Itoh, S., I.Yasuda, T.Nakatsuka J.Nishioka, Y.N.Volkov
  • Journal Title: J.Geophys.Res 115 Pages: C08004,doi:10.1029/2009JC005629
  • Peer Reviewed
• [Journal Article] Characteristics of mesoscale eddies in the Kuroshio-Oyashio Extension regions detected from the distribution of the sea surface height anomaly. (2010)
  • Author(s): Itoh, S., I.Yasuda
  • Journal Title: J.Phys.Oceanogr. 40 Pages: 1018-1034
  • Peer Reviewed
• [Presentation] 北海道沖を北上する高気圧渦の構造・水塊特性変動 (2011)
  • Author(s): 伊藤幸彦
  • Organizer: 2010年度日本海洋学会秋季大会
  • Place of Presentation: 東京農業大学オホーツクキャンパス
  • Year and Date: 2011-09-07
• [Presentation] Warm and cold-core anticyclonic eddies in the western subarctic North Pacific (2010)
  • Author(s): S.Itoh
  • Organizer: North Pacific Marine Science Organization
  • Place of Presentation: Oregon Convention Center
  • Year and Date: 2010-10-29
• [Presentation] Characteristics of mesoscale eddies in the Kuroshio-Oyashio Extension Region detected from the distribution of the sea surface height anomaly (2009)
  • Author(s): S.Itoh
  • Organizer: North Pacific Marine Science Organization
  • Place of Presentation: Jeju International Convention Center
  • Year and Date: 2009-10-23