Kuroshio-induced cold eddy streets in the lee of isolated islands

Osamu Isoguchi, Masanobu Shimada, Futoki Sakaida, Hiroshi Kawamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Cold eddy streets formed in the lee of isolated islands were investigated in relation to the Kuroshio current. Multitemporal SAR images acquired over a one-month period revealed island wake patterns, such as meandering disturbances and eddy streets. These patterns corresponded to the Kuroshio path, indicating a Kuroshio-island interaction. We constructed highspatial-resolution sea-surface temperature (SST) images for the time when the Kuroshio impinged on the islands by regressing the LANDSAT infrared images on the AVHRR-derived SST. The images revealed low-SST island wakes, some of which included cold eddy streets. A numerical simulation was performed to investigate their formation mechanism. The simulation qualitatively reproduced the cold eddy pattern, with eddy-driven mixing developing a mixed layer down to 100m, causing the lowSST island wakes. The shedding frequency and distance of the model-produced eddies were close to those of the Karman vortex theory, suggesting that Karman-like cold eddy streets developed behind the islands when the Kuroshio passed.

Original languageEnglish
Title of host publication2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
Pages858-861
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007 - Barcelona, Spain
Duration: 2007 Jun 232007 Jun 28

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)

Other

Other2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
CountrySpain
CityBarcelona
Period07/6/2307/6/28

Keywords

  • Flow-topography interaction
  • Island wakes
  • Kuroshio

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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