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Posts tagged Gironde Estuary

Phytoplankton Bloom Off Coast of France – April 20th, 2013

45.5N 2W

April 20th, 2013 Category: Image of the day, Phytoplankton

France – April 20th, 2013

A phytoplankton bloom can be seen in the Bay of Biscay off the west coast of France, near the mouth of the Gironde Estuary. The sediments spilling out of the estuary appear yellowish green, while the phytoplankton bloom is more blue in color, with spiralled patterns due to ocean currents.

Sediments in Gironde Estuary and Around Île d’Olerón, France

44.5N 2.9W

November 23rd, 2012 Category: Sediments

France – November 22nd, 2012

Sediments pour from the Garonne and Dordogne Rivers, through the Gironde Estuary, and into the Bay of Biscay. They also frame the shores of western France, near the estuary, and surround the Île d’Oléron, an island due west of Rochefort, on the southern side of the Pertuis d’Antioche strait. With an area of about 174 km2, it is the second largest French island after Corsica.

Sediments in English Channel and Gironde Estuary – March 31st, 2012

48.1N 3.3W

March 31st, 2012 Category: Image of the day, Sediments

United Kingdom and France - March 28th, 2012

Sediments can be observed in the English Channel, separating the United Kingdom (above) from France (below, right), and along the western coast of France, particularly in the Gironde Estuary. The Gironde is formed from the meeting of the rivers Dordogne and Garonne just below the centre of Bordeaux. Covering around 635 km2 (245 sq mi), it is the largest estuary in western Europe.

Sediments in the Gironde Estuary, France – February 7th, 2012

44.8N 0.5W

February 7th, 2012 Category: Rivers, Sediments

France - January 4th, 2012

The Gironde Estuary, formed by the confluence of the Garonne and Dordogne rivers, is the largest estuary in Europe at almost 50 miles (80 km) long and up to 7 miles (11 km) wide. The estuary’s average discharge rate into the Atlantic is 265,000 gallons (1 million liters) per second.

It has a large tidal range, of up to 16 ft (5 m) during periods of spring tide, and the strong tidal currents in the estuary, as well as numerous sand banks, tend to hamper navigation. One of the Gironde’s most impressive features is its tidal bore—a large, wall-like wave at the leading edge of the incoming tide—known locally as the Mascaret. Occurring with each flood tide at the time of spring tides (that is, twice daily for a few days every two weeks), the bore surges from the Gironde upstream into its narrower tributaries. On the Garonne, the Mascaret sometimes forms a barreling wave, which can reach a height of 5 ft (1.5 m) and tends to break and reform.

Bordeaux by Gironde Estuary, France

44.8N 0.5W

January 1st, 2012 Category: Rivers, Sediments

France - December 26th, 2011

Here, sediments from the Gironde Estuary create paisley patterns in the waters of the Bay of Biscay, off the west coast of France. The Gironde is a navigable estuary, formed from the meeting of the rivers Dordogne and Garonne just below the centre of Bordeaux (visible at the bottom edge).

The Gironde is approximately 65 km (40 mi) long and 3–11 km (2–7 miles) wide. Covering around 635 km2 (245 sq mi), it is the largest estuary in western Europe. The Gironde is subject to very strong tidal currents and great care is needed when navigating.

Bordeaux is located close to the European Atlantic coast, in the southwest of France and in the north of the Aquitaine region. The city is built on a bend of the river Garonne, and is divided into two parts: the right bank to the east and left bank in the west. The left bank of the Garonne is a low-lying, often marshy plain.