Vättern
Encyclopedia
Lake
A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...
(by surface area) in Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....
, after Lake Vänern
Vänern
Vänern is the largest lake in Sweden, the largest lake in the EU and the third largest lake in Europe after Ladoga and Onega in Russia. It is located in the provinces of Västergötland, Dalsland, and Värmland in the southwest of the country.- History :...
and the sixth largest lake in Europe. It is a long, finger-shaped body of fresh water in south central Sweden to the southeast of Vänern pointing at the tip of Scandinavia
Scandinavia
Scandinavia is a cultural, historical and ethno-linguistic region in northern Europe that includes the three kingdoms of Denmark, Norway and Sweden, characterized by their common ethno-cultural heritage and language. Modern Norway and Sweden proper are situated on the Scandinavian Peninsula,...
.
Name
One of the etymologies for name Vättern is from "vatten", the Swedish word for water. This origin is, however, unclear and in dispute. It has also been suggested that the archaic term "vätter", meaning forest or lake spirits, is the origin of the lake's name.Geography
The lake's total surface area is about 1,912 km², with a drainage basin a little over double that, about 4,503 km². The deepest known point, located to the south of the island of VisingsöVisingsö
Visingsö is an island in the southern half of the lake Vättern in Sweden.Visingsö lies 30 km north of the city Jönköping and 6 km west of Gränna from which two car ferries connects the island...
, is 128 meters. The average depth is 40 meters. The lake has a perimeter of about 642 km. The volume is 74 km³. These numbers tend to be fixed, as the level of the lake is regulated.
Situated in Götaland
Götaland
Götaland , Gothia, Gothland, Gothenland, Gautland or Geatland is one of three lands of Sweden and comprises provinces...
, the lake is drained by Motala ström
Motala ström
Motala ström is the river system that drains lake Vättern, the second largest lake in Sweden, into the Baltic Sea in Norrköping. It is named from the city Motala where it begins. In the early 19th century, the Göta Canal was constructed in parallel with Motala ström....
, starting at Motala
Motala
Motala is a locality and the seat of Motala Municipality, Östergötland County, Sweden with 29,798 inhabitants in 2005. It is the third largest city of Östergötland, following Linköping and Norrköping...
, and flowing ultimately through a controlled canal into the Baltic Sea
Baltic Sea
The Baltic Sea is a brackish mediterranean sea located in Northern Europe, from 53°N to 66°N latitude and from 20°E to 26°E longitude. It is bounded by the Scandinavian Peninsula, the mainland of Europe, and the Danish islands. It drains into the Kattegat by way of the Øresund, the Great Belt and...
. The lake includes the scenic island of Visingsö
Visingsö
Visingsö is an island in the southern half of the lake Vättern in Sweden.Visingsö lies 30 km north of the city Jönköping and 6 km west of Gränna from which two car ferries connects the island...
, located outside Gränna
Gränna
Gränna is a locality situated in Jönköping Municipality, Jönköping County, Sweden with 2,578 inhabitants in 2005. It is situated in Småland on the eastern shores of the lake Vättern, about 35 km north of Jönköping....
. Other towns on the lake include Vadstena
Vadstena
Vadstena is a locality and the seat of Vadstena Municipality, Östergötland County, Sweden, with 5,612 inhabitants in 2005. From 1974 to 1979 Vadstena was administered as part of Motala Municipality....
, Jönköping
Jönköping
-Notable people:*Lillian Asplund, RMS Titanic survivor*John Bauer, illustrator, painter*Amy Diamond, singer*Agnetha Fältskog, ABBA*Carl Henrik Fredriksson, editor-in-chief and co-founder of Eurozine*Anders Gustafsson, kayaker, Olympian...
, Hjo
Hjo
Hjo is a locality and the seat of Hjo Municipality, Västra Götaland County, Sweden It had 6,075 inhabitants in 2005.Hjo comes from the word Hīun or Hīwun meaning family or household.-History:...
, Askersund
Askersund
Askersund is a locality and the seat of Askersund Municipality, Örebro County, Sweden with 3,937 inhabitants in 2005.- Geography :The city is located in the northern bay of Lake Vättern....
, Åmmeberg
Åmmeberg
Åmmeberg is a locality situated in Askersund Municipality, Örebro County, Sweden with 654 inhabitants in 2005. It is situated at an estuary by a fjord of lake Vättern. It existed as early as the 12th century and had a mill owned by the convent in Riseberga...
and Karlsborg
Karlsborg
Karlsborg is a locality and the seat of Karlsborg Municipality, Västra Götaland County, Sweden. It had 3,574 inhabitants in 2005. This garrison town lies at the shore of lake Vättern in Västergötland.-History:...
. It is bounded by the Provinces
Provinces of Sweden
The provinces of Sweden, landskap, are historical, geographical and cultural regions. Sweden has 25 provinces and they have no administrative function, but remain historical legacies and the means of cultural identification....
of Västergötland
Västergötland
', English exonym: West Gothland, is one of the 25 traditional non-administrative provinces of Sweden , situated in the southwest of Sweden. In older English literature one may also encounter the Latinized version Westrogothia....
, Närke
Närke
' is a Swedish traditional province, or landskap, situated in Svealand in south central Sweden. It is bordered by Västmanland to the north, Södermanland to the east, Östergötland to the southeast, Västergötland to the southwest, and Värmland to the northwest...
, Östergötland
Östergötland
Östergötland, English exonym: East Gothland, is one of the traditional provinces of Sweden in the south of Sweden. It borders Småland, Västergötland, Närke, Södermanland, and the Baltic Sea. In older English literature, one might also encounter the Latinized version, Ostrogothia...
and Småland
Småland
' is a historical province in southern Sweden.Småland borders Blekinge, Scania or Skåne, Halland, Västergötland, Östergötland and the island Öland in the Baltic Sea. The name Småland literally means Small Lands. . The latinized form Smolandia has been used in other languages...
.
In the north there is a scenic but not mountainous inland fjord
Fjord
Geologically, a fjord is a long, narrow inlet with steep sides or cliffs, created in a valley carved by glacial activity.-Formation:A fjord is formed when a glacier cuts a U-shaped valley by abrasion of the surrounding bedrock. Glacial melting is accompanied by rebound of Earth's crust as the ice...
, Alsen. About 62% of the drainage basin is still covered with spruce
Spruce
A spruce is a tree of the genus Picea , a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal regions of the earth. Spruces are large trees, from tall when mature, and can be distinguished by their whorled branches and conical...
, pine
Pine
Pines are trees in the genus Pinus ,in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species.-Etymology:...
and deciduous forest. About 26.7% is dedicated to agriculture.
Geology
The geology of the lake is closely bound to that of the Baltic SeaBaltic Sea
The Baltic Sea is a brackish mediterranean sea located in Northern Europe, from 53°N to 66°N latitude and from 20°E to 26°E longitude. It is bounded by the Scandinavian Peninsula, the mainland of Europe, and the Danish islands. It drains into the Kattegat by way of the Øresund, the Great Belt and...
, of which it was often part. The lake, with Vänern, was part of a connecting waterway system through central Sweden to the Skagerrak
Skagerrak
The Skagerrak is a strait running between Norway and the southwest coast of Sweden and the Jutland peninsula of Denmark, connecting the North Sea and the Kattegat sea area, which leads to the Baltic Sea.-Name:...
several times in the recent geological past.
Lake Vättern is located in a graben
Graben
In geology, a graben is a depressed block of land bordered by parallel faults. Graben is German for ditch. Graben is used for both the singular and plural....
that was formed by crustal movements in the east-west direction 40 to 50 Mya. During the most recent millions of years multiple glaciations have covered the lake and its surroundings, leaving glacial striations and drumlin
Drumlin
A drumlin, from the Irish word droimnín , first recorded in 1833, is an elongated whale-shaped hill formed by glacial ice acting on underlying unconsolidated till or ground moraine.-Drumlin formation:...
s as they receded.
The present-day lake began as an independent body of water left by the receding Scandinavian glacier after the last glacial period around 10,000 BP. It soon became a minor bay of the Baltic ice lake
Baltic ice lake
The Baltic ice lake is a name given by geologists to a freshwater lake that gradually formed in the Baltic Sea basin as glaciation retreated from that region at the end of the Pleistocene. The lake, dated to 12,600-10,300 BP, is roughly contemporaneous with the three Pleistocene Blytt-Sernander...
. Most of the lake's relict species
Relict
A relict is a surviving remnant of a natural phenomenon.* In biology a relict is an organism that at an earlier time was abundant in a large area but now occurs at only one or a few small areas....
(like the arctic char
Arctic char
Arctic char or Arctic charr is both a freshwater and saltwater fish in the Salmonidae family, native to Arctic, sub-Arctic and alpine lakes and coastal waters. No other freshwater fish is found as far north. It is the only species of fish in Lake Hazen, on Ellesmere Island in the Canadian Arctic...
) date from this time. Subsequently it was a bay of Yoldia Sea
Yoldia Sea
Yoldia Sea is a name given by geologists to a variable brackish-water stage in the Baltic Sea basin that prevailed after the Baltic ice lake was drained to sea level during the Weichsel glaciation...
and then became connected to Ancylus Lake
Ancylus Lake
Ancylus lake is a name given by geologists to the body of fresh water that replaced the Yoldia Sea after the latter had been severed from its saline intake across central Sweden by the isostatic rise of south Scandinavian landforms. The dates are approximately 9500-8000 BP calibrated, during the...
, discharging from the north end of its extent. At about 8000 BP an accident of the uneven Scandinavian isostatic land rise brought Vättern above Ancylus and the two became distinct.
The annual post-glacial rebound
Post-glacial rebound
Post-glacial rebound is the rise of land masses that were depressed by the huge weight of ice sheets during the last glacial period, through a process known as isostasy...
today is 3.5 mm in northeastern Motala and 2.6 mm in southern Jönköping. This means that lake Vättern is tilting to the south by one millimeter every year.
Biology
The lake contains both phytoplanktonPhytoplankton
Phytoplankton are the autotrophic component of the plankton community. The name comes from the Greek words φυτόν , meaning "plant", and πλαγκτός , meaning "wanderer" or "drifter". Most phytoplankton are too small to be individually seen with the unaided eye...
and zooplankton
Zooplankton
Zooplankton are heterotrophic plankton. Plankton are organisms drifting in oceans, seas, and bodies of fresh water. The word "zooplankton" is derived from the Greek zoon , meaning "animal", and , meaning "wanderer" or "drifter"...
, such as Copepoda and Cladocera
Cladocera
Cladocera is an order of small crustaceans commonly called water fleas. Around 620 species have been recognised so far, with many more undescribed. They are ubiquitous in inland aquatic habitats, but rare in the oceans. Most are long, with a down-turned head, and a carapace covering the apparently...
. The benthos
Benthos
Benthos is the community of organisms which live on, in, or near the seabed, also known as the benthic zone. This community lives in or near marine sedimentary environments, from tidal pools along the foreshore, out to the continental shelf, and then down to the abyssal depths.Many organisms...
species include Crustacea, Oligochaeta
Oligochaeta
Oligochaeta is a subclass of animals in the biological phylum Annelida, which is made up of many types of aquatic and terrestrial worms, and this includes all of the various earthworms...
, Diptera
Diptera
Diptera , or true flies, is the order of insects possessing only a single pair of wings on the mesothorax; the metathorax bears a pair of drumstick like structures called the halteres, the remnants of the hind wings. It is a large order, containing an estimated 240,000 species, although under half...
and Bivalvia
Bivalvia
Bivalvia is a taxonomic class of marine and freshwater molluscs. This class includes clams, oysters, mussels, scallops, and many other families of molluscs that have two hinged shells...
. In addition are several species of fish, including Salvelinus salvelinus, Coregonus lavaretus and Salmo salar. The lake is known for its Vättern char, as it is called, Salvelinus alpinus
Arctic char
Arctic char or Arctic charr is both a freshwater and saltwater fish in the Salmonidae family, native to Arctic, sub-Arctic and alpine lakes and coastal waters. No other freshwater fish is found as far north. It is the only species of fish in Lake Hazen, on Ellesmere Island in the Canadian Arctic...
.
It is said that there is a lake monster
Lake monster
A lake monster or loch monster is a purported form of fresh-water-dwelling megafauna appearing in mythology, rumor, or local folklore, but whose existence lacks scientific support. A well known example is the Loch Ness Monster. Lake monsters' depictions are often similar to some sea monsters...
inhabiting Vättern. It is however not nearly as famous as the one supposedly living in Storsjön
Storsjön
Storsjön is the fifth largest lake in Sweden, with an area of 464 km² and a greatest depth of 74 m. It is located in the province of Jämtland in modern Jämtland County. From Storsjön runs the river Indalsälven and the lake contains the major island Frösön...
.
The lake
Vättern is known for the annual recreational cycling race Vätternrundan
Vätternrundan
Vätternrundan is a bicycle recreational ride around Lake Vättern in Sweden which is held in mid-June every year. Covering a distance of approx. 300 km, it starts and finishes in the town of Motala...
, attracting some 20,000 participants to finish the 300 km trip around the shores of the lake.
Vättern is also noted for its fishing, serving people in the nearby districts. Tourist sport fishermen and vacationers are free to fish in the lake as long as they don't use nets. The lake is also used for commercial fishing.
The drainage basin
A number of industries provide employment in the drainage basin: mining, manufacturing, forestry and paper. Agriculturalists raise cattle, sheep, swine and poultry.Other notes
Ingmar BergmanIngmar Bergman
Ernst Ingmar Bergman was a Swedish director, writer and producer for film, stage and television. Described by Woody Allen as "probably the greatest film artist, all things considered, since the invention of the motion picture camera", he is recognized as one of the most accomplished and...
shot a scene in his classic film Wild Strawberries
Wild Strawberries (film)
Wild Strawberries is a 1957 Swedish film written and directed by Ingmar Bergman, about an old man recalling his past. The original Swedish title is Smultronstället, which literally means "the wild strawberry patch", but idiomatically means an underrated gem of a place...
on a restaurant terrace overlooking Lake Vättern.