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Duncan Christie

Universidad Austral de Chile
Participates in 2 items

Sessions in which Duncan Christie participates

Wednesday 29 June, 2022

Time Zone: (GMT-05:00) Eastern Time (US & Canada)
11:00
11:00 - 12:15 | 1 hour 15 minutes

Information garnered from historical timbers and wooden artifacts (e.g. houses, barns, ships) can greatly enhance our understanding of human, ecological, and climate history, especially in regions where few old-growth forests and trees remain, tree longevity is relatively short (less than 300-400 years), and environmental conditions break down wood rather quickly, like in mesic to wet regions Over the last decade plus, the application of tree-ring techniques on woo...

11:15
11:15 - 11:30 | 15 minutes

Fluctuations in water resources is one of the main factors modulating ecosystem dynamics, human population changes and culture in semiarid regions. One of the largest high-altitude semiarid regions of South America is the Altiplano in the Central Andes. With an elevation of 4.000 m this region has been the environment for the settlement of many communities who have inhabited the region for thousands of years. Tree-ring research has been developed in this region allowing the reconstruction ...

Sessions in which Duncan Christie attends

Monday 27 June, 2022

Time Zone: (GMT-05:00) Eastern Time (US & Canada)
13:30
13:30 - 17:00 | 3 hours 30 minutes

Free, in person and onlineThe stable isotopic compositions of carbon and oxygen (d13C and d18O) measured in tree rings are valuable proxies for reconstructing paleoclimate and are increasingly used as paleophysiological proxies. Applying these proxies in ecophysiology and paleoclimate can be challenging as they rely on complex process-based models and poorly constrained input data. In recent years, h...

Thursday 30 June, 2022

Time Zone: (GMT-05:00) Eastern Time (US & Canada)
11:00
11:00 - 12:15 | 1 hour 15 minutes

Dendrochronological archives in the tropics of the Americas have been under-studied for a long time. Some of the challenges include the Identification of tree-ring boundaries in certain tree species, absence of winter dormancy associated to low temperatures in most of the cases, and logistic difficulties of fieldwork in remote sites. However, part of the slow progress is also related to the fact that historically much less resources have been inv...