讲座报告 Seminar
Luncheon Seminar #158: Unexpected iron cycling at the Peru Margin  

【时间 Time】:2019-9-16 (星期一) 1:00pm-2:30pm    【浏览次数 Count】:209   【发布时间 Updated】:2019-9-10
【地点 Venue】:周隆泉楼A3-206   A3-206 Zhou Long Quan Building
【主讲人 Speaker】:Phoebe Lam,Associate Professor   
【来访单位 Institution】:University of California, Santa Cruz,USA     
【邀请人 Host】:蔡平河  Pinghe Cai      【联络人 Contact】:黄迎   Ying Huang 2181571

Abstract:

The GP16 Eastern Pacific Zonal Transect cruise from Peru to Tahiti in 2013 along 12-15°S crossed the large eastern tropical South Pacific oxygen deficient zone (ODZ) in the eastern half of the transect, which was expected to be an important source of dissolved iron into the ocean interior.  Contrary to expectations, there was no significant iron plume in the heart of the ODZ around 250 m that extended beyond the coastal margin, despite the ODZ penetrating several thousand of kilometers into the interior.  Surprisingly, a deep coastal iron plume in oxygenated waters centered around 2000 m was observed to penetrate >1000 km into the interior. In this talk, I examine the possible reasons behind the unexpected high Fe from the oxygenated deep slope relative to the more reducing ODZ above. 

 

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