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Indian Ocean Subtropical Mode Water: Its Water Characteristics and Spatial Distribution : Volume 6, Issue 1 (22/01/2010)

By Tsubouchi, T.

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Book Id: WPLBN0004020448
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Indian Ocean Subtropical Mode Water: Its Water Characteristics and Spatial Distribution : Volume 6, Issue 1 (22/01/2010)  
Author: Tsubouchi, T.
Volume: Vol. 6, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Suga, T., Hanawa, K., & Tsubouchi, T. (2010). Indian Ocean Subtropical Mode Water: Its Water Characteristics and Spatial Distribution : Volume 6, Issue 1 (22/01/2010). Retrieved from

Description: Department of Geophysics, Tohoku University, Sendai, Japan. We have improved a basic description (water characteristics and spatial distribution) of the Indian Ocean Subtropical Mode Water (IOSTMW) using an isopycnally averaged three-dimensional hydrographic dataset. Two mode waters and corresponding wintertime mixed layer depth maxima were observed north of the subtropical front (STF) in the South Indian Ocean: IOSTMW (within 25.8–26.2 ΣΘ) in the region of 28–45° E and another subtropical mode water in the subtropical gyre (within 26.4–26.7 ΣΘ) in the 60–80° E longitudinal band. Through careful examination of the spatial distribution and water characteristics of a core in the layer of minimum vertical temperature gradient (LMVTG), we identified that a mass of LMVTG corresponds to IOSTMW. The average water characteristics of the IOSTMW during approximately 1960–2004 were 16.54 ± 0.49 °C, 35.51 ± 0.04 psu and 26.0 ± 0.1 ΣΘ. The IOSTMW distribution area was estimated to be 25–50° E, 27–38° S. The formation region and approximate water characteristics of the second subtropical mode water were also estimated. Its probable formation region was 37–42° S, 60–80° E and north of the STF, with approximate water characteristics of 12.84 ± 0.57 °C, 35.17 ± 0.11 psu and 26.57 ± 0.04 ΣΘ.

Indian Ocean Subtropical Mode Water: its water characteristics and spatial distribution

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