| Title | End-Member mixing analysis as a tool for the detection of major storms in lake sediment records |
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| Author | Patterson, R T; Nasser, N A; Gregory, B R B; Patterson, C W; Mazzella, V; Roe, H M; Galloway, J M ; Reinhardt, E |
| Source | Paleoceanography and Paleoclimatology vol. 37, issue 11, e2022PA004510, 2022 p. 1-20, https://doi.org/10.1029/2022PA004510  Open Access |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20210454 |
| Publisher | John Wiley and Sons Inc |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | New Brunswick |
| NTS | 21G11; 21G14 |
| Area | Harvey Lake |
| Lat/Long WENS | -67.0619 -67.0061 45.7722 45.7214 |
| Subjects | Science and Technology; sedimentology; Nature and Environment; storms |
| Illustrations | location maps; diagrams; tables; charts |
| Program | Environmental
Geoscience Mackenzie River |
| Released | 2022 10 22 |
| Abstract | Extreme Tropical Cyclone Events (ETCE) regularly cause extensive damage and loss of life in coastal regions of the western North Atlantic Basin. The short instrumental record leaves significant gaps in
the understanding of long-term trends in ETCE recurrence, intensity, and rate of change, creating considerable uncertainty about future storm impacts on thise region. A 520-year core record from Harvey Lake, located >80 km from the Atlantic coast in
southwestern New Brunswick, Canada, revealed extensive records of heavy rain events and ETCE using End Member Mixing Analysis (EMMA) of lake sediment grain size data, an approach that permits recognition of subtle sedimentological processes. Three
end members were recognized and correlated to heavy rainfall events (EM01), spring freshet (EM02), and ETCE (EM03). Based on a previous analysis of lake bottom sediments following passage of Post-Tropical Storm Arthur in 2014, EM03 provides an analog
for recognizing signatures of other well-documented ETCE on the lake (e.g. Saxby Gale in (1869 and), Gerda in (1969)). Numerous, major (EM01) rainfall events and four (EM03) ETCE events characterized the basal part of the core record during the early
Little Ice Age (LIAa) phase, terminating at AD 1650. A near cessation of heavy rainfall events and ETCE characterized the subsequent (1650-1840), colder LIAb phase. A resurgence of major rainfall events and seven ETCE occurred during the recovery
from the LIA starting in 1840. We conclude that EMMA provides a robust tool for recognition of ETCE and major rainfall events, and greatly expands the pool of potential research for studying paleo-storm activity and trends well inland from coastal
regions. |
| Summary | (Plain Language Summary, not published)
The grain size of lake sediments are used to reconstruct past storm events at a site in New Brunswick. |
| GEOSCAN ID | 329304 |
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