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Posts tagged Pilbara

White Sands of Eighty Mile Beach and Red Sediments from De Grey River, Australia

20.3S 119.2E

November 23rd, 2010 Category: Rivers

Australia - November 9th, 2010

The whitish area along the coast of Western Australia is a sandy beach called the Eighty Mile Beach, so named for its length of approximately eighty miles.

To the west of the end of the beach is a reddish headland. Here, the De Grey River releases orange-red sediments into the ocean. The headland is part of Western Australia’s Pilbara (pronounced “Pillbra”) region, a large, dry, thinly populated region in the north of the state known for its vast mineral deposits, in particular iron ore.

Tropical Cyclone Laurence (06S) Makes Landfall in Australia

14.2S 128.8E

December 15th, 2009 Category: Tropical Storms

Tropical Cyclone Laurence (06S) - December 13th, 2009

Tropical Cyclone Laurence (06S) - December 13th, 2009

Track of TC 06S - December 14th, 2009 © Univ. of Wisconsin

Track of TC 06S

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Tropical Cyclone Laurence (06S) tracked through Darwin Australia this weekend before sliding back into the Timor Sea and is now forecast to make a second landfall in Australia. The storm is forecast to make landfall north of Wyndham in the Kimberley region, then parallel the coastline while moving over land for the next couple of days, heading southwest through the northern area of the Great Sandy Desert and into the Pilbara region.

Laurence is currently located approximately 250 nautical miles west-southwest of Darwin, Australia, and has tracked westward along the northwestern periphery of the mid-level subtropical steering ridge at 6 knots over the past six hours. Maximum significant wave height is 14 feet.

Upper-level analysis indicates the system is near the subtropical ridge axis and animated water vapor imagery shows good poleward and equatorward outflow. Accordingly, the system has intensified over the last 6 to 12 hours and an AMSR-E microwave image shows tightly wrapped banding and a microwave eye. Wyndham radar imagery also shows the wrapping convection and apparent low level circulation center, confirming the position.

TC 06S is expected to continue tracking generally west-southwestward along the northwestern coast of Australia throughout the forecast period. In the near term, an approaching mid-latitude trough will pass to the south but enable the steering ridge to remain oriented north-south, allowing the system to begin tracking south-southwestward over the next 24 hours.

By TAU 48, however, the system should weaken slightly as it interacts over land and it will turn more westward as a lobe of the steering ridge builds more southwestward. After TAU 96, the system should track back over very warm water and begin to re-intensify under favorable environmental conditions.

Fortescue and Robe Rivers Discharge Rust-Red Sediments

February 22nd, 2009 Category: Fires, Rivers

Red sediments, Australia - February 19th, 2009

Red sediments, Australia - February 19th, 2009

Rusty red colored sediments from the Fortescue River (below) and the Robe River (above) spill into the Indian Ocean.

The Fortescue is a river in the Pilbara region of Western Australia. It rises near Deadman Hill in the Ophthalmia Range and discharges into the Indian Ocean at Mardie Station.

The large island, about 50 kilometres (31 mi) northwest off the coast, is called Barrow Island. It has an area of 202 square kilometers (78 sq mi).

Barrow Island is noted for its flat spinifex grasslands spotted with termite mounds. It also has many limestone caves, which support subterranean ecological communities.

Between Barrow Island and the coast is an archipelago known as the Mary Anne Group.

Together with the Mangrove Islands and Passage Islands, it is part of a long chain of near-shore islands stretching from the vicinity of Onslow to the mouth of the Fortescue River.