کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4537385 | 1626493 | 2008 | 16 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An examination of the physical variability around the Pribilof Islands in 2004 An examination of the physical variability around the Pribilof Islands in 2004](/preview/png/4537385.png)
The Pribilof Islands form a unique ecosystem. An anti-cyclonic oceanic flow exists around the islands. Nutrients are introduced into this circulation from two sources: (1) the flow along the 100-m isobath with intrusions of nutrient-rich water in Pribilof Canyon, and (2) the westward transport and vertical mixing of middle-shelf water, which contains nutrient-rich bottom water. Enhanced tidal mixing around the Pribilofs introduces this deeper, nutrient-rich water into the euphotic zone and thus supports prolonged production around the islands. Further, the middle-shelf water that is advected into the region causes the upper 50 m of the water column around the islands to freshen throughout the summer. This enhances the frontal structure and strengthens the baroclinic flow along the 100-m isobath. The strengthening of the frontal structure can moderate ecosystem productivity by limiting the intrusion of slope water rich in nutrients and oceanic copepods.
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 55, Issues 16–17, August 2008, Pages 1701–1716