Gravity Anomalies, Regional Elevation, and the Deep Structure of the North Atlantic ...
The pattern of depth and gravity anomalies in the North Atlantic Ocean was examined by using 1° × 1° and 5° × 5° averages. The gravity field is dominated by two features: a broad high in the northern and central portion of the ocean and a large area of very negative anomalies in the western basin. T...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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Columbia University
1978
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.7916/d8ng4pdx https://academiccommons.columbia.edu/doi/10.7916/D8NG4PDX |
| Summary: | The pattern of depth and gravity anomalies in the North Atlantic Ocean was examined by using 1° × 1° and 5° × 5° averages. The gravity field is dominated by two features: a broad high in the northern and central portion of the ocean and a large area of very negative anomalies in the western basin. The negative anomaly in the western North Atlantic has no expression in residual depth anomalies and does not appear to be related to surface features. The North Atlantic Gravity High is bounded on the south by an important and distinct boundary near 30°N which is present in both depth and gravity anomalies. North of this latitude, residual gravity anomalies (corrected for the ‘ridge anomaly’) take the form of a very broad high of about 20 mGal with the values along isochrons nearly constant from 30°N to at least as far north as 75°N. The depths within this region are consistently shallow with 5° × 5° average residual depth anomalies which vary greatly from a few hundred meters near the Charlie Gibbs fracture zone ... |
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