کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4537063 | 1626483 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-resolution velocity and hydrographic observations of the Drygalski Trough gravity plume
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-resolution velocity and hydrographic observations of the Drygalski Trough gravity plume High-resolution velocity and hydrographic observations of the Drygalski Trough gravity plume](/preview/png/4537063.png)
چکیده انگلیسی
During the second cruise of the AnSlope project, the hydrography and velocity fields within a descending gravity plume in the northwestern Ross Sea Shelf area were sampled at high resolution. The observations give insights into small-scale fluctuations of the three-dimensional velocity field in and around the core of a strong gravity current, associated with peak velocities close to 2 m/s. There are two distinct layers of high acoustic backscatter (at 300 kHz) near the seabed associated with increased velocity variance and Richardson numbers near 0.25, suggesting that the high backscatter is caused by increased levels of turbulence resulting in increased acoustic Bragg scattering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 56, Issues 13–14, June 2009, Pages 835–842
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 56, Issues 13–14, June 2009, Pages 835–842
نویسندگان
Martin Visbeck, Andreas M. Thurnherr,