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General Session (Dendrogeosystems)

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11:00, Wednesday 29 Jun 2022 (1 hour 15 minutes)
Coeur des Sciences, Sherbrooke Building, UQAM - Salle polyvalente (SH-4800)   Virtual session
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Sub Sessions

11:00 - 11:15 | 15 minutes

Forty years ago Dr. Tom Yanosky, a research botanist with the US Geological Survey, reported that ash trees growing along the Potomac River contained rings with abnormal wood anatomy caused by flood damage. Dr. Yanosky recommended these rings — which he dubbed “flood rings” — could be used to estimate the date, seasonal timing, and (most importantly) peak stage of past floods. Since that discovery, flood rings have been identified for forested river systems in eastern France, central Canad...

11:15 - 11:30 | 15 minutes

Coastal maritime forests in northeastern USA are mostly fragmented and currently threatened by climate change. This study focuses on American holly (Ilex opaca) trees located in the coastal maritime forests of Sandy Hook, N.J. and Fire Island, N.Y. to better understand how vulnerable and resilient these forests are to future climate scenarios. There are few published studies that use tree-ring methods in the maritime forests of N.J. and dendrochronological research on holly species has jus...

11:30 - 11:45 | 15 minutes

In western Canada, internal natural variability is the dominant source of uncertainty for the climate model projection of precipitation and related variables. Tree-ring records capture this natural variability and also enable testing of the capacity of climate models to simulate significant modes of variability. We compare millennial tree-ring reconstructions of the weekly flows of the Athabasca and North Saskatchewan Rivers to weekly flows from a hydrological model forced with climatology...

11:45 - 12:00 | 15 minutes

"Drought legacy effects (DLE) in radial tree growth (RTG) have been extensively studied over the last decade and are found to critically influence carbon sequestration in woody biomass. However, the statistical significance of DLE depends on our definition of expected vs. unexpected growth variability, a definition that has not received sufficient scrutiny.Here, we revisit popular DLE analyses using the ITRDB and employ a synthetic data simulation to disentangle four key factors influe...

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