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The fall overturn and winter cooling in Lake Superior
Author(s) -
NED P. SMITH
Publication year - 1973
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1973.18.3.0483
Subject(s) - isothermal process , water column , environmental science , atmospheric sciences , series (stratigraphy) , spectral analysis , climatology , oceanography , geology , physics , thermodynamics , paleontology , quantum mechanics , spectroscopy
Daily average temperatures and standard deviations are computed from two nearshore time series from Lake Superior during the fall overturn and the following period of cooling in winter 1966–1967. Temperatures from the 10‐m level decrease irregularly to near 0°C by mid‐February. Average temperatures from the 200‐m level decrease to 1.9°C by late January. The water column becomes isothermal at 4°C in early December. Energy density spectra computed from both time series show energy values dropping off exponentially with decreasing period and no significant spectral peaks.