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Measurements and modelling of the water : ice heat flux in natural waters

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Title: Measurements and modelling of the water : ice heat flux in natural waters
Authors: Shirasawa, Kunio Browse this author →KAKEN DB
Leppäranta, Matti Browse this author
Kawamura, Toshiyuki Browse this author →KAKEN DB
Ishikawa, Masao Browse this author
Takatsuka, Toru Browse this author
Keywords: heat flux from water
floating ice
growth
melting
measurements
Issue Date: 2006
Publisher: IAHR
Journal Title: Proceedings of the 18th IAHR International Symposium on Ice
Volume: 1
Start Page: 85
End Page: 91
Abstract: Ice in natural waters grows and decays as forced by the fluxes through the upper and lower boundaries. In particular, the flux at the lower boundary -- i.e. the heat flux from the liquid water body into the bottom of the ice sheet -- is not very well known quantity. This question is approached by measurements and mathematical modelling. The data are from Saroma-ko lagoon, a saline lake on the northern coast of Hokkaido, and Lake Pääjärvi, a fresh water basin in southern Finland. Three-dimensional current velocity, temperature and salinity were measured at a fixed depth, and the resulting heat flux was normally 5-10 W/m2 in both basins, a bit more in Saroma. But even in Lake Pääjävi, which is a rather quiet water body in wintertime (total ice coverage with very weak currents) the heat flux from the water is important in the heat budget of the ice sheet. A three-layer (snow/snow-ice/congelation ice) model is used to examine the evolution of ice thickness and temperature.
Description: The 18th IAHR International Symposium on Ice. 28 August - 1 September 2006. Sapporo, Japan.
Conference Name: IAHR International Symposium on Ice
Conference Sequence: 18
Conference Place: Sapporo
Type: proceedings
URI: http://hdl.handle.net/2115/38935
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 白澤 邦男

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