Earth Snapshot RSS Feed Twitter

Posts tagged Wadden Sea

The Jade Estuary and the Weser River, Germany

53.5N 8.1E

February 1st, 2010 Category: Rivers

Germany - December 31st, 2009

Germany - December 31st, 2009

The Jade Estuary, Jadebusen in German, is a bay on the North Sea coast of Germany. It was formerly known simply as Jade or Jahde. The Jade is a part of the German Wadden Sea National Parks. The port of Wilhelmshaven is on the western shore of the bay.

About 180 km² (70 mi²) in area, the Jade was largely created by storm floods during the twelfth and sixteenth centuries. During this period it was connected in the East to the river Weser (running from the bottom right corner towards the image center). This connection was closed between 1721 and 1725 by dikes reconnecting Butjadingen to the mainland as a peninsula.

In the West the Jade extended far into the Frisian peninsula. From the early sixteenth century a number of dikes were built against the storm floods and to arable land. The main dike, Ellenser Damm, was built between 1596 and 1615 based on an agreement between the principalities of East Frisia and Oldenburg.

Island of Sylt by Jutland Peninsula, Denmark and Germany

January 26th, 2010 Category: Snapshots

Denmark - December 31st, 2009

Denmark - December 31st, 2009

The west coast of the Jutland Peninsula, along the Wadden Sea, is marked by many inlets and nearby islands. Of particular interest is the T-shaped island of Sylt, below center. An imaginary line running from the island eastward across the peninsula would delineate the border between the countries of Denmark (above) and Germany (below).

Sylt, belonging to Germany’s North Frisian Islands, is well known for the distinctive shape of its shoreline. With 99.14 km², Sylt is the fourth-largest German island and the largest North Sea island. Sylt is situated at 9 to 16 km off the mainland.

The island’s shape has constantly shifted over time, a process which is still ongoing today. It is frequently covered by the media in connection with its exposed situation in the North Sea and its ongoing loss of land during storm tides.

Today, Sylt extends for 38 km in a north-south direction and on its northern peak at Königshafen is only 320 m wide. Its widest distance, from the town of Westerland in the west to the eastern Nössespitze near Morsum, measures 12.6 km. On the western and northwestern shore a 40 km sand beach is located. Much of the Wadden Sea east of Sylt belongs to the Schleswig-Holstein Wadden Sea National Park and mostly falls dry during low tide.

Frisian Islands Chain and Dikes in the Netherlands

May 13th, 2009 Category: Snapshots

The Netherlands - May 12th, 2009

The Netherlands - May 12th, 2009

The West Frisian Islands, in a chain off the coast of the Netherlands, separate the North Sea from the Wadden Sea, an intertidal zone between the continental coast and the islands.

While the North Sea is deeper and appears dark navy blue here, the Wadden Sea has a greenish brown color, as it is a shallow body of water with tidal flats and wetlands rich in biological diversity.

The biggest and most populated of the Frisian Islands is called Texel. It is also the westernmost of this archipelago, and forms the largest natural barrier between the two seas. The dune landscape on Texel is a unique habitat for wildlife.

Below Texel and the Wadden Sea is a body of water formerly known as the  Zuiderzee. After being closed off from the North Sea by a dike, it was separated into two lakes: the IJsselmeer and the Markermeer, which are in turn separated by another dike called the Houtribdijk.

These dikes are visible in the full image as lines where the color of the water changes abruptly from dark brown (Wadden Sea), to dark green (IJsselmeer) to bright green (Markermeer).

The Coastline of Denmark – May 6th, 2009

May 6th, 2009 Category: Image of the day

Denmark - April 23rd, 2009

Denmark - April 23rd, 2009





The entire coastline of Denmark (center) is visible in this image, as well as parts of the shorelines of Germany (bottom),  Norway (top left) and Sweden (top right).

The main bodies of water visible include the North Sea (left) and the Baltic Sea(right), connected by the Skagerrak and Kattegat Straits (top center). Denmark has long controlled the approach to the Baltic Sea, and these waters are also known as the Danish Straits.

Denmark consists of a large peninsula, Jutland and many islands, most notably Zealand, as well as hundreds of minor islands often referred to as the Danish Archipelago. The peninsula and 443 named islands give the country a very long total coastline of 7,314 kilometres (4,544 mi).

The first close-up focuses on the western side of the Jutland Peninsula, near the border between Denmark and Germany. The islands here are called the Frisian Islands, in the Wadden Sea. The area is typified by extensive tidal mud flats and deeper tidal trenches.

The second close-up shows the top of the Jutland Peninsula and Denmark’s northernmost point, called Skagens Point. The country is flat with little elevation; having an average height above sea level of only 31 metres (102 ft).