Lake Suwa

Lake Suwa
suwa-ko (諏訪湖)
Lake Suwa
Location in Japan
Location Nagano prefecture
Coordinates 36°02′54″N 138°05′03″E / 36.04833°N 138.08417°E / 36.04833; 138.08417
Primary inflows 31 small rivers of the Kiso Mountains
Primary outflows Tenryū River
Basin countries Japan
Surface area 13.3 km2 (5.1 sq mi)
Average depth 4.7 m (15 ft)
Max. depth 7.2 m (24 ft)
Shore length1 15.9 km (9.9 mi)
Surface elevation 759 m (2,490 ft)
Settlements Okaya, Suwa, Shimosuwa
1 Shore length is not a well-defined measure.

Lake Suwa (諏訪湖 Suwa-ko) is a lake in the Kiso Mountains, in the central region of Nagano Prefecture, Japan.

Geography

The lake is the source of the Tenryū River. It ranks 24th in lake water surface area in Japan.

The cities of Suwa and Okaya, and town of Shimosuwa, are located on the shores of Lake Suwa.

Features

Lake Suwa is the site of an interesting natural phenomenon, The God's Crossing (御神渡り o-miwatari). The lake has a natural hot spring under its surface. When the lake's surface freezes in the winter, its lower waters are still circulating. This results in ice pressure ridges forming in the surface ice, reaching heights of 30 centimetres (0.98 ft) or more.

Local tradition holds that the ridges are formed by the gods crossing the lake, when travelling between the various buildings of the Shinto shrine Suwa Taisha. Folklore says it is the guardian god of Suwa, Takeminakata-no-kami, leaving his sanctuary to meet with his wife, the goddess Yasakatome, joining the opposite bank by walking on frozen water.

Natural history

Research on ice breakup on the lake and at the mouth of the Torne River in Finland suggested "global processes including climate change and variability are driving the long-term changes in ice seasonality."[1][2]

In fiction

References

  1. Sharma, Sapna; Magnuson, John J; Batt, Ryan D; Winslow, Luke A; Korhonen, Johanna; Aono, Yasuyuki (2016). "Direct observations of ice seasonality reveal changes in climate over the past 320–570 years". Scientific Reports. 6. doi:10.1038/srep25061. Article ID 25061. Retrieved 2016-05-07.
  2. Bell, Jillian (2016-04-27). "Industrial Revolution strongly tied to earlier thaws, later freezes: study". CBC News. Retrieved 2016-05-07.
  3. http://anime-culture.com/pilgrimage/your-name/953.html

See also

Wikimedia Commons has media related to Lake Suwa.
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