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Posts tagged Patagonia

Sediments and Phytoplankton by Coast of Argentine Patagonia

40.1S 58.6W

June 24th, 2013 Category: Phytoplankton MODISAqua

Argentina – June 22nd, 2013

Phytoplankton and sediments float in the waters of the Atlantic, parallel to the coast of Argentina. Sediments are particularly dense along the coast by Bahía Blanca (upper right quadrant), while two other mixed plumes can be viewed trailing off the Valdes Peninsula (center) and the southern end of the San Jorge Gulf.

Climate Change in Patagonia, Argentina

43.6S 69.2W

March 22nd, 2013 Category: Climate Change

Argentina – March 21st, 2013

Most focus on climate change in Argentina has been in the north, where impacts are more noticeable. However, new studies also show how changes in the south, particularly in the Patagonian province of Chubut, are also likely to be significant.

Increasing temperature and decreasing rainfall in northwest Chubut are shifting the patterns of agricultural viability. Predominant patterns of cattle and sheep farming are likely to face increasing shortages of dry season grazing. Natural forests and existing and planned plantations are also likely to face increasing aridity—exacerbating the risk of dieback, forest fires and pest and disease outbreaks.

Water shortage is likely to become an increasingly pressing concern—especially with the heavy reliance on hydropower, major development plans for irrigated agriculture and forestry, heavy technological demands from the petrochemical industry for water pressure to drive oil extraction, and the importance of aquatic environments for regional tourism (click here for more information).

Milky Blue of Argentine Glacial Lakes

49.5S 72.6W

February 27th, 2013 Category: Lakes

Argentina and Chile – January 25th, 2013

Visible in the lower left quadrant of this image are three bright blue glacial lakes in Argentine Patagonia: Argentino Lake, Lake Viedma and Lake San Martín (below to above).

A glacial lake is a lake with origins in a melted glacier. They are formed when a glacier erodes the land, and then melts, filling the hole or space that they have created. The scouring action of the glaciers pulverizes minerals in the rock over which the glacier passes. These pulverized minerals become sediment at the bottom of the lake, and some of the rock flour becomes suspended in the water column, giving the water a milky blue color.

Dust and Phytoplankton by Argentine Coast – December 11th, 2012

44S 64.6W

December 11th, 2012 Category: Dust Storms, Image of the day, Phytoplankton

Argentina – December 8th, 2012

A phytoplankton bloom that began off the coast of Argentine Patagonia in October can still be seen here, two months later (click here for previous images). The bloom is south of Peninsula Valdes (upper right quadrant). Some dust can also be seen blowing off the coast, just north of the bloom.

Lakes in Argentine and Chilean Patagonia

49.5S 72.6W

November 18th, 2012 Category: Lakes, Mountains

Chile and Argentina – November 16th, 2012

Several lakes can be seen by the Andes Mountains and Chile-Argentina border in this image of Patagonia. The northernmost is known as Lake General Carrera (Chilean side) or Lake Buenos Aires (Argentine side). It has a surface of 1,850 km² of which 970 km² are in Chile and 880 km² in Argentina, making it the biggest lake in Chile, and the fourth largest in Argentina. The lake is of glacial origin and drains to the Pacific Ocean on the west through the Baker River.

Visible to its south, also dark blue in color, is known as Cochrane Lake in Chile and Pueyrredón Lake in Argentina. The Argentine portion of the lake has a surface of 150 km2, while the portion in Chile covers 175 km2. It is a glacier fed lake.

Continuing southward, three light blue lakes can be seen: Lake O’Higgins/San Martín (the former name is used in Chile, the latter in Argentina), Viedma Lake and Argentino Lake. All three are glacial lakes, and their milky color is due to rock flour suspended in their waters.