Seafloor spreading, sea level, and ocean chemistry changes
نویسندگان
چکیده
منابع مشابه
Sea level changes forced by Southern Ocean winds
[1] On regional scales, changes in sea level are significantly affected by local dynamical changes. Westerly winds over the Southern Ocean have been strengthening and shifting southward in recent decades, and this change is projected to continue in the future. This study applies wind forcing anomalies to an eddy-permitting ocean model to study the dynamical response to a Southern Hemisphere wes...
متن کاملNonvolcanic seafloor spreading and corner-flow rotation
[1] Drilling during ODP Leg 209, dredging, and submersible dives have delineated an anomalous stretch of the Mid-Atlantic Ridge north and south of the 15 200N Fracture Zone. The seafloor here consists dominantly of mantle peridotite with gabbroic intrusions that in places is covered by a thin, discontinuous extrusive volcanic layer. Thick lithosphere (10–20 km) in this region inhibits magma fro...
متن کاملSea level rise in the Arctic Ocean
About 60 tide-gauge stations in the Kara, Laptev, East-Siberian and Chukchi Seas have recorded the sea level change from the 1950s through 1990s. Over this 40-year period, most of these stations show a significant sea level rise (SLR). In light of global change, this SLR could be a manifestation of warming in the Arctic coupled with a decrease of sea ice extent, warming of Atlantic waters, chan...
متن کاملOcean freshening, sea level rising, sea ice melting
[1] Estimates of 20th Century sea level rise are typically 1.5 to 2 mm/y, with a steric contribution of (0.5 ± 0.2) mm/y. Estimates of the eustatic contribution vary widely between 1.1 and +1.3 mm/y. We attempt an independent estimate of eustatic sea level rise based on the measured freshening of the global ocean, and with attention to the contribution from melting of sea ice (which affects fre...
متن کاملMass extinctions and sea-level changes
Review of sea-level changes during the big five mass extinctions and several lesser extinction events reveals that the majority coincide with large eustatic inflexions. The degree of certainty with which these eustatic oscillations are known varies considerably. Thus, the late Ordovician and end Cretaceous extinctions are associated with unequivocal, major regressions demonstrated from numerous...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2005
ISSN: 0096-3941
DOI: 10.1029/2005eo370004