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Archive for November 14th, 2009

Santa Cruz Province, Argentine Patagonia – November 14th, 2009

47.7S 65.8W

November 14th, 2009 Category: Image of the day, Lakes, Rivers

Argentina - September 30th, 2009

Argentina - September 30th, 2009

Santa Cruz is a province of Argentina, located in the southern part of the country, in Patagonia. It borders Chubut province to the north, and Chile to the west and south. To the east is the Atlantic Ocean. It is the second largest province of the country, but the least densely populated of the Argentine mainland.

The average temperatures are 13°C in summer, and 3° in winter, when temperatures can fall to -25°. Strong winds blow all year round.

To the west, the Andes at these latitudes are lower than in the centre and north of Argentina, but still have year-round snow. An immense ice sheet feeds numerous glaciers. Even though precipitation in this western ice-sheet area is common, rain is scarce in other areas, with an average of 200 mm per year.

The lakes in western Santa Cruz province are mostly fed by glacieal melt-water; however, due to the cold climate their shores are not used for agriculture. The largest include Buenos Aires Lake (2,240 km², of which 881 km² is in Argentina), Cardiel Lake (460 km²), Viedma Lake (1082 km²), Argentino Lake (1560 km²), Pueyrredón Lake, Belgrano Lake and San Martín Lake (1.013 km²) are all in the west of the province.

The Atlantic coastline is a mixture of beaches and cliffs. From the centre to the Atlantic coast in the east, plateaux of descending height dominate the landscape. The cold, arid steppe is crossed by rivers that produce fertile valleys; Deseado River, Santa Cruz River, Gallegos River, Coyle River, Chico River and Pinturas River.

Here, the Deseado River can be seen crossing the upper half of the image horizontally and spilling greenish sediments into the Atlantic Ocean. Its source is the glacier-thaw of Buenos Aires Lake, visible as a large, dark blue body of water due west of the river along the mountainous border with Chile.

Further down the shoreline, the Santa Cruz and Chico Rivers create a large delta from which more sediments flow into the ocean. The source of the Santa Cruz Rivers begins at the shore of the Viedma and Argentino Lakes (both visible although partially covered by clouds west of the delta.

The Skagerrak Between Norway, Sweden and Denmark

58.2N 9.8E

November 14th, 2009 Category: Snapshots

Sweden and Denmark - September 29th, 2009

Sweden and Denmark - September 29th, 2009

The Skagerrak (left) is a strait running between Norway (left edge), the southwest coast of Sweden (above) and the Jutland peninsula of Denmark (below), connecting the North Sea and the Kattegat Sea area (below center), which leads to the Baltic Sea (right).

The Skagerrak is roughly triangular in shape, measuring 240 kilometers (149 mi) in length, and between 80 km (50 mi) and 140 km (87 mi) in width. It deepens toward the Norwegian coast, reaching over 700 metres at the Norwegian Trench.

The Skagerrak has a salinity of 30 practical salinity units. The volume available to biomass is about 3,600 square kilometers (1,390.0 sq mi), including a wide variety of habitats from the sandbanks to Sweden and Denmark to the deeps of the Norwegian trench.

Here, other than some sediments hugging the northwest coast of Denmark, the shores of the Skagerrak are mostly clear.

Jamuna River on Eastern Border of Bangladesh’s Rajshahi Division

24.3N 88.6E

November 14th, 2009 Category: Rivers

Bangladesh - September 6th, 2009

Bangladesh - September 6th, 2009

The Jamuna River flows past the cities and towns of Bangaldesh’s Rajshahi Division along the right edge of this radar image. Rajshahi is one of the six administrative divisions of Bangladesh. It has a population of almost 30 million and area of about 34,513 km².

The Rajshahi division is in the north western corner of Bangladesh. It is bordered by the Padma River to the south, while the Jamuna lies across the eastern border. In the North and West, Rajshahi division shares a border with India.

The Jamuna River is one of the three main rivers of Bangladesh. It is the main channel of the Brahmaputra River when it flows out of India into Bangladesh. The Jamuna flows south, merging first with the Padma and later the Meghna River. Its waters then flow into the Bay of Bengal as the Meghna River.