@misc{10481/111022,
year = {2021},
url = {https://hdl.handle.net/10481/111022},
abstract = {In late winter, solar radiation is the main driver of water motion in ice-covered lakes. The resulting circulation and mixing determine the spatial distribution of heat within the lake and affect the heat budget of the ice cover. Although under-ice lake warming is often modeled as a one-dimensional (1D) vertical process, lake bathymetry induces a relative excess heating of shallow waters, creating horizontal density gradients. This study shows that the dynamic response to these gradients depends sensitively on lake size and latitude – Earth's rotation – and is controlled by the Rossby number. In the ageostrophic limit, horizontal density gradients drive cross-shore circulation that transports excess heat to the lake interior, accelerating the under-ice warming there. In the geostrophic regime, the circulation of the near- and off-shore waters decouples, and excess heat is retained in the shallows. The flow regime controls the fate of this excess heat and its contribution to water-induced ice melt.},
organization = {Swiss National Science Foundation (project Buoyancy driven nearshore transport in lakes, HYPOlimnetic THErmal SIphonS, HYPOTHESIS)},
organization = {U.S. National Science Foundation, Physical Oceanography},
publisher = {EGU},
title = {Bathymetry and latitude modify lake warming under ice},
doi = {https://doi.org/10.5194/hess-25-1813-2021},
author = {Ramón Casañas, Cintia Luz and Ulloa, Hugo N. and Doda, Tomy and Winters, Kraig B. and Bouffard, Damien},
}