977 resultados para 305.235


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Sedimentary processes in the southeastern Weddell Sea are influenced by glacial-interglacial ice-shelf dynamics and the cyclonic circulation of the Weddell Gyre, which affects all water masses down to the sea floor. Significantly increased sedimentation rates occur during glacial stages, when ice sheets advance to the shelf edge and trigger gravitational sediment transport to the deep sea. Downslope transport on the Crary Fan and off Dronning Maud and Coats Land is channelized into three huge channel systems, which originate on the eastern-, the central and the western Crary Fan. They gradually turn from a northerly direction eastward until they follow a course parallel to the continental slope. All channels show strongly asymmetric cross sections with well-developed levees on their northwestern sides, forming wedge-shaped sediment bodies. They level off very gently. Levees on the southeastern sides are small, if present at all. This characteristic morphology likely results from the process of combined turbidite-contourite deposition. Strong thermohaline currents of the Weddell Gyre entrain particles from turbidity-current suspensions, which flow down the channels, and carry them westward out of the channel where they settle on a surface gently dipping away from the channel. These sediments are intercalated with overbank deposits of high-energy and high-volume turbidity currents, which preferentially flood the left of the channels (looking downchannel) as a result of Coriolis force. In the distal setting of the easternmost channel-levee complex, where thermohaline currents are directed northeastward as a result of a recirculation of water masses from the Enderby Basin, the setting and the internal structures of a wedge-shaped sediment body indicate a contourite drift rather than a channel levee. Dating of the sediments reveals that the levees in their present form started to develop with a late Miocene cooling event, which caused an expansion of the East Antarctic Ice Sheet and an invigoration of thermohaline current activity.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

"April 15, 1964."

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Contiene: Tomo I (XXIII, [4], LVI, 331 p., 5 h. de lám. pleg.). - Tomo II ([4], 422 p., 4 h. de lám. pleg.). - Tomo III ([4], 378, 4 h. de lám. pleg.). - Tomo IV ([2], 305, [3] p., 5 h. de lám. pleg.). - Tomo V ([6], 379 p., 5 h. de lám. pleg.). - Tomo VI ([6], 472 p., [5] h. de lám. pleg.). - Tomo VII ([8], 454 p.). - Tomo VIII ([6], 235 p.)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

"Materials Laboratory. Contract no. AF(616)-2803, Project no. 7360."

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The Supplemental Low Income Energy Assistance Fund is the depository for energy assistance charges collected by utilities and participating municipal utilities and electric cooperatives authorized by the Electric Customer Choice and Rate Relief Act of 1997 (220 ILCS 5). The energy assistance charges provided a nonfederal funding stream to the Department for use in providing energy related assistance to low-income households under the Illinois Low Income Home Energy Assistance and Illinois Home Weatherization (LIHEAP) Programs. Since the changes were imposed in January of 1998, $406,683,769 has been deposited into the Fund through December 2003. Of this amount, the Department has spent $326,137,510 to provide energy assistance to 802,091 households; $33,845,784 to weatherize 6,584 homes; and $32,570,739 to cover administrative expenses.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

According to Section 305(b) of the Clean Water Act (i.e. a generic name that refers to the Federal Water Pollution Control Act of 1972, the Clean Water Act of 1977, and subsequent amendments) and guidance provided by the United States Environmental Protection Agency (USEPA), each state must prepare and submit annually to the U.S. Congress and the USEPA report that describes the resource quality of the surface waters of the state. Every other year, this report, commonly referred to as the "305(b) report," must be provided in written form, whereas in alternate years each state may submit an electronic database to meet the reporting requirement. In the 305(b) report, states must also explain how they determined the resource quality of the waters of the state in terms of the degree to which predefined beneficial uses of those waters are supported. Also, in the 305(b) report when any designated use for any water body is not fully supported, the state must report potential reasons for the impairment. Herein, is explained how the Illinois Environmental Protection Agency determines the resource quality of Illinois streams, inland lakes, and Lake Michigan.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

"September 2007"--Colophon.