| | | | Title: | | | | | Volume/Number: | 2003 | | | | Issuing Agency: | | | | | Description: | 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. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2003-09 | | | | ISL ID: | 000000000875 Original UID: 999999994414 FIRST WORD: Temporal | |
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