کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6384304 | 1326316 | 2013 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A multi-scale investigation into seafloor topography of the northern Mid-Atlantic Ridge based on geographic information system analysis
ترجمه فارسی عنوان
یک تحقیق چند بعدی در مورد توپوگرافی دریایی دریای شمال حاشیه اقیانوس اطلس بر اساس تجزیه و تحلیل سیستم اطلاعات جغرافیایی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
The Mid Atlantic Ridge (MAR) has been identified as an important component of the lower bathyal (800â3500 m depth) benthic biogeographic province in the North Atlantic Ocean. We performed a multi-scale characterization of seafloor topography of the MAR. In the basin-scale analysis, we have used the 30â³ General Bathymetric Chart of the Oceans (GEBCO) grid to estimate the area of different components of lower bathyal habitat in the main North Atlantic basin and to produce a corresponding depth-area relationship. The regional-scale investigation is based on swath bathymetry surveys which show the flanks to MAR to comprise a series of sediment-draped flat plains (37.65% of area) with intervening gentle slopes ranging from 5° to 30° (56.70% of area) and slopes steeper than 30° (5.65% of area). The steep slopes have significant areas of hard substrate (70%) comprising bare cliff faces and rock outcrops. Within the local-scale approach, detailed surveys of such steep areas were done by multi-beam sonar and cameras mounted on a Remotely Operated Vehicle (ROV). In several locations, the terrace-like seafloor topography has also been identified. Overall, it has been shown that the MAR lower bathyal is 95% covered with soft sediment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 98, Part B, 15 December 2013, Pages 231-243
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 98, Part B, 15 December 2013, Pages 231-243
نویسندگان
Tomasz Niedzielski, Ã
ge Høines, Mark A. Shields, Thomas D. Linley, Imants G. Priede,