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Posts tagged Arnhem Land

Sediments in Blue Mud Bay, Australia

13.4S 136.1E

March 9th, 2012 Category: Sediments

Australia - December 30th, 2011

Sediments frame the coast of the Gulf of Carpentaria, in Australia, giving it a golden hue that progressively fades to green and then turquoise as they diffuse into the gulf. Visible in the upper left quadrant, west of the island of Groote Eylandt, is Blue Mud Bay.

The bay, greenish-blue from sediments, as its name suggests, is a large, shallow, partly enclosed bay on the eastern coast of Arnhem Land, in the Northern Territory of Australia, facing Groote Eylandt on the western side of the Gulf of Carpentaria. The bay is about 90 km in length and up to 35 km in width. Its 45 km wide mouth stretches from Cape Shield in the north-east to Cape Barrow in the south-west, with Woodah Island in between. It has a diverse inner coastline of many small bays, inlets, headlands and islands, bordered by intertidal mudflats and mangroves merging into freshwater floodplains.

Good Vegetation Index in Arnhem Land, Australia, by Gulf of Carpentaria

16.2S 136.9E

February 2nd, 2012 Category: Vegetation Index

Australia - December 30th, 2011

This FAPAR image shows the vegetation index of the land bordering the Gulf of Carpentaria, Australia. This land is generally flat and low-lying. The climate is in the area is hot and humid with two seasons (dry and wet) per year. This image was captured during the wet season, which lasts from December to March.

To the west is Arnhem Land, the Top End of the Northern Territory, and Groote Eylandt, the largest island in the Gulf. The vegetation index in this area is mostly good (green). To the east is the Cape York Peninsula. The area to the south (like the Cape York Peninsula, part of Queensland) is known as the Gulf Country or simply “the Gulf.” The terrain in these areas shows a lower index (yellow), also some good photosynthetic activity can be observed along the rivers on the eastern side.

Sunglint in Gulf of Carpentaria by Groote Eylandt, Australia

13.9S 136.5E

January 12th, 2012 Category: Snapshots

Australia - January 12th, 2012

The water along the Gulf of Carpentaria off the coast of Australia’s Northern Territory appears silvery in color due to sun glint. The glint highlights the contours of the coast, including several large bays and the outline of Groote Eylandt, the largest island in the Gulf of Carpentaria.

Groote Eylandt lies about 50 km from the Northern Territory mainland and eastern coast of Arnhem Land (about 630 km from Darwin), opposite Blue Mud Bay. The island measures about 50 km from east to west and 60 km north—south, a total area of 2,326.1 km². It is generally quite low-lying, with an average height above sea level of 15 m, although Central Hill reaches an elevation of 219 metres.

Vegetation Index of Arnhem Land, Australia

13.9S 136.5E

June 30th, 2011 Category: Vegetation Index

Australia - June 22nd, 2011

This FAPAR image shows the vegetation index of the Arnhem Land Region, one of the five regions of the Northern Territory of Australia. It is located in the north-eastern corner of the territory and has an area of 97,000 km.

The land near the coast and on  Groote Eylandt (the large island in the Gulf of Carpentaria) shows a good vegetation index (green), while the land further inland has a low index (yellow) of photosynthetic activity.

Islands in the Gulf of Carpentaria, Australia – November 12th, 2008

November 12th, 2008 Category: Image of the day

Islands in Gulf of Carpentaria, Australia - October 30th, 2008

Islands in Gulf of Carpentaria, Australia - October 30th, 2008

Close-up of Groote Eylandt

Close-up of Groote Eylandt

In our main image we can see various clusters of islands and an algal bloom near the western coast of Australia’s Gulf of Carpentaria.

The largest island, featured in the first close-up, is called Groote Eylandt. It is the biggest island in the Gulf of Carpentaria.

Groote Eylandt lies approximately 50 km from the Northern Territory mainland and eastern coast of Arnhem Land (approximately 630 km from Darwin). The island measures approximately 50 km from east to west and 60 km north—south, a total area of some 2,260 km². It is generally quite low-lying, with an average height above sea level of 15 m.

This island is the homeland of, and is owned by, the Anindilyakwa people (who still speak the isolated Anindilyakwa language). It is part of the Arnhem Land Aboriginal Reserve. The island has until recently been open to the public only with permission. There is, however, a large manganese mine near the community of Angurugu, which produces more than 3.8 million tonnes annually (about 25 percent of the world’s total).

Close-up of algal bloom along the coast, Gulf of Carpentaria

Close-up of algal bloom along the coast, Gulf of Carpentaria

The island between Groote Eylandt and the Australian mainland is Bickerton Island. It is situated 13 km west of Groote Eylandt and 8 km east of mainland Australia, in the Northern Territory. A small aboriginal community of about 140 people lives on this island.

Other islands around Groote Eylandt and Bickerton Island include Winchelsea Island, Connexion Island, Hawknest Island, Nicol Island and North Point Island.

Moving southeast along the coastline, there is another cluster of islands, known as the Sir Edward Pellew Group. The largest of these is Vanderlin Island, with an area of 264 km². The others in the group are East Island, Centre Island and West Island.

In the second close-up, we can see an algal bloom off the southern coast of the Gulf of Carpentaria, near Maria Island, as well as sediments flowing into the gulf from the Roper River, which marks the southern limit of the rugged region known as Arnhem Land. The Roper River drains an area of 23,500 square miles (60,860 square km). Its flow increases greatly during the summer.

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