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2016 ; 6
(ä): 37832
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Meteotsunamis in the Laurentian Great Lakes
#MMPMID27883066
Bechle AJ
; Wu CH
; Kristovich DA
; Anderson EJ
; Schwab DJ
; Rabinovich AB
Sci Rep
2016[Nov]; 6
(ä): 37832
PMID27883066
show ga
The generation mechanism of meteotsunamis, which are meteorologically induced
water waves with spatial/temporal characteristics and behavior similar to seismic
tsunamis, is poorly understood. We quantify meteotsunamis in terms of
seasonality, causes, and occurrence frequency through the analysis of long-term
water level records in the Laurentian Great Lakes. The majority of the observed
meteotsunamis happen from late-spring to mid-summer and are associated primarily
with convective storms. Meteotsunami events of potentially dangerous magnitude
(height > 0.3?m) occur an average of 106 times per year throughout the region.
These results reveal that meteotsunamis are much more frequent than follow from
historic anecdotal reports. Future climate scenarios over the United States show
a likely increase in the number of days favorable to severe convective storm
formation over the Great Lakes, particularly in the spring season. This would
suggest that the convectively associated meteotsunamis in these regions may
experience an increase in occurrence frequency or a temporal shift in occurrence
to earlier in the warm season. To date, meteotsunamis in the area of the Great
Lakes have been an overlooked hazard.