物理海洋学名词-B 48

Glossary of Physical Oceanography and Related Disciplines

Steven K. Baum Department of Oceanography Texas A&M University

May 26, 2004

 

Balearic Channels   The collective name give to the Ibiza Channel, the Mallorca Channel and the deep trough in the Gulf of Valencia, all features found within the Balearic Sea. According to Pinot et al. [2002]: The Balearic Channels are important passages for the meridional exchange between the cooler, more saline waters of the northern basin and the warmer, fresher waters of the southern (Algerian) basin of the western Mediterranean.

The Northern Current carries northern waters from the Gulf of Lions southward along the continental slope in the Balearic Sea. This current bifurcates as it reaches the northern end of the Ibiza Channel. The main branch proceeds southward and crosses the sill carrying cool and salty water into the Algerian Basin, while the minor one is retroflected cyclonically and returns to the north-east forming the Balearic Current that crosses the continental slope of the islands. This latter current is also fed by warmer, fresher southern waters from the Algerian Basin, which flow northward through both channels. This smooth pattern obtained from a climatological analysis was later found to be the average picture of a highly fluctuating circulation..

See Pinot et al. [2002].


Balearic Sea   One of the seas that comprise the western basin of the Mediterranean Sea which is sometimes called the Catalan Sea. It lies between the Iberian coast and the Balearic Islands (Ibiza, Mallorca,Menorca) in the northwestern Mediterranean. It is separated from the Tyrrhenian Sea to the east by Sardinia and Corsica and abuts the Alboran Sea to the west. The bathymetry is dominated by the Balearic Abyssal Plain, which covers over 30,000 square miles, covering the majority of the basin floor at depths ranging from 2700-2800 m. This is bordered to the northwest by the Rhone Fan, a large sedimentary cone.The circulation can be seen to first order to be a single oblong cyclonic cell with a divergence zone aligned with the shape of the basin. More detailed studies have shown the surface circulation to be
strong year–round and characterizied by two permanent density fronts. These are the Catalan Front on the continental shelf slope and the Balearic Front on the Balearic Islands shelf slope, with the former the more active. The northern area a plume of cold water frequently seen moving southward along the
continental slope and shedding dipole eddies along its leading edge. Energetic filaments continuously spawned by the Catalan Front seem to be associated with this plume. See Fairbridge [1966], La Violette et al. [1990], Pinot and Ganachaud [1999] and Pinot et al. [2002].


Bali Sea   A regional sea which is part of the Australasian Mediterranean Sea in the southwest Pacific Ocean.It is classified as a distinct sea for navigational purposes but is usually grouped with the Flores Sea for oceanographic purposes. It is centered at around 116◦ E and 8.5◦ S and is bordered by Bali and Sumbawa to the south and Madura to the west, and abuts the Java Sea to the north and the Flores Sea to the east. The Bali Sea covers an area of about 45,000 km2 and has a greatest depth of 1590 m. It is mostly underlain by a small trough extending to the west of the Flores Trough and is bound by sills to the south (the 200 m Bali Strait and the 220 m Lombok Strait) and by a narrow, 600 m deep passage connecting it to the Makassar Stait to the north. The circulation and water mass properties are continuous with the contiguous Flores and Java Seas to
the east and north, repectively. Most of the oceanographic interest in the Bali Sea is concerned with its role in the Indonesian throughflow of Pacific Ocean waters into the Indian Ocean, with most if not all of this flow passing through the aforementioned Bali and Lombok Straits. See Fairbridge [1966]  

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