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bottom water |
Also found in: Wikipedia | 0.03 sec. |
bottom waterLowermost layer of ocean water that can be distinguished by its characteristic low temperature, high density, and low oxygen content compared with surface waters. Most bottom waters are formed near Antarctica during the southern winter. The partial freezing of seawater over the Antarctic continental shelf produces salt-free ice and residual brine with a high density, which causes it to sink; it then flows northward along the seafloor. The Arctic Ocean is less important as a source of bottom water because it is isolated by barriers such as the Bering Sill and submarine ridges and banks between Greenland and the British Isles. |
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? Mentioned in | ? References in periodicals archive | |
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A hypoxic bottom water region of 7 sites extending seaward to ~20 m water depth near FH-2 and extending along the 10 m isobath from Ship Island to Petit Bois Pass was detected. Yokoyama (2002) suggested that the difference in the level of organic input between the two sites results in the differences in the dissolved oxygen content of the bottom water, sulfide content of the sediments and, subsequently, the macrobenthic assemblages. or the British Isles--which would otherwise be far colder--and replacing it with upwellings of cold bottom water conveyed from the poles. |
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