JpGU-AGU Joint Meeting 2017

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[EE] Poster

A (Atmospheric and Hydrospheric Sciences) » A-GE Geological & Soil Environment

[A-GE39] [EE] Subsurface Mass Transport and Environmental Assessment

Tue. May 23, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Shoichiro Hamamoto(Department of Biological and Environmental Engineering, The University of Tokyo), Yuki Kojima(Gifu University), Hirotaka Saito(Department of Ecoregion Science, Tokyo University of Agriculture and Technology), Yasushi Mori(Graduate School of Environmental and Life Science, Okayama University)

[AGE39-P22] Spreading of Antarctic Intermediate Water in the Philippine Sea

*Nan Zang1 (1.Chinese Academy of Science Institute of Oceanography)

Keywords:the Antarctic Intermediate Water, the Mindanao Undercurrent

The Antarctic Intermediate Water (AAIW) is carried by the New Guinea Coastal Undercurrent (NGCUC) to the Philippine Sea (PS), then carried by the Mindanao Undercurrent (MUC) northward. In this study, the AAIW presents two divided parts using a stricter definition. The outshore part of AAIW locates between 400-650db, and reaches 10°N northmost. The inshore part locates below 800db, and it extends about 15°N. The two parts are connected by an anticyclonic gyre at about 1.5-3°N, 127.2-128.6°E. The wavelet spectrum of the AAIW volume indicate that the significant periods of outshore part and inshore part are 2.3 years and 3.9 years, respectively. We speculate the relationship between ENSO and the two parts of AAIW, but need deeper research about the dynamics in the future.