Electronic Documents of Illinois
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Temporal behavior of the levels of middle and upper Great Lakes reveals major space and time climate differences during 1861-2001.
- Levels of Lakes Superior, Michigan-Huron, and Erie were assessed to identify key temporal fluctuations in their averages and extreme values during the 1861-2001 period. Behavior of levels of Lakes Michigan-Huron and Superior since 1861 has included vastly different long-term distributions, differences in amount of variability over time, and differences in occurrence times of their record-high and low levels. Record high or low 15-year periods were present on one or more lakes in 64 years, and record events based on 25-year periods were present in 96 of 141 years, both representative of records during a much longer period than if the record events had occurred simultaneously on all lakes. These lake-level differences reflect significant differences in climate conditions between basins, and principally precipitation over time. There were two eras when levels of all lakes exhibited exceptional variability and extreme high and low levels, 1923-1938 and 1973-2001, reflecting considerable climatic instability over the entire Great Lakes basin.
Originally Deposited as: 999999994414
Phone Number: Language(s): EN-English Volume or Year: 2003
Number or Issue: Date Created: 9 24 2004
Date Last Modified: 4 16 2004 Librarian Remarks:
Access This Publication1. Temporal behavior of the levels of middle and upper Great Lakes reveals major space and time climate differences during 1861-2001. (20061003184216_ISWSCR2003-09.pdf).
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