Bannister 110

A Tree-Ring Smorgasbord

A traditional Swedish smörgåsbord contains many dishes, where you usually sample a little of each. In this talk, I will serve a tree-ring based smorgasbord, based on my career as a tree-ring scientist over the last twenty years or so. I will guide you through various environments and research projects across the world, with some special focus on the long-term research conducted in the central Scandinavian Mountains.

Director - Vision Talk

The Influence and Interactions of Humans, Climate, and Fire on Mixed Conifer Forest Dynamics in the Sierra Nevada, USA

Fire is recognized as keystone process in Sierra Nevada dry mixed conifer forests and it has been drastically reduced by decades of fire exclusion. Frequent fire is thought have created a fire-grained mosaic of multi-aged forests that developed as a result of self-organizing processes where burn patterns and forest structure interact to maintain a fine-grained mosaic over time.

Director - Committee meeting

Director - Vision Talk

Director - Room setup

Tree-Rings and the Coupled Carbon Cycle Climate System

Forest ecosystems are one of Earth’s primary biomes: they provide a diverse suite of ecosystems goods and services crucial for societal well-being and play a crucial role in our planet’s carbon cycle. However, great uncertainties exist regarding the quantification, dynamics, and driving processes of terrestrial carbon cycling, and thus also the fate of forested regions. Dendrochronological methods are remarkably well suited to investigate forest carbon cycling on long and temporally precise time-scales and at tree-level to continental spatial scales.

Director - Vision Talk

The Power of Paleo: How records of the past help us understand global warming, El Niño, and drought

The risks we face from a changing climate result from a combination of human-caused and natural variability. We can better prepare for future conditions if we fully understand natural patterns of climate variation and how those patterns have behaved in the recent past. Yet the instrumental record of climate variation is sparse and short – inadequate to characterize, for example, the multidecadal processes associated with megadroughts and fluctuations in global temperature, or the intrinsic variability in remote regions of the tropical Pacific critical to the El Niño system.

Global Change in the Great Lakes Region 14ka to 6ka: The Story from an Ancient Wood Project

The deglaciation of North America had profound affects on climate, hydrology, flora, humans, and megafauna. Pollen records have traditionally been the primary source of information about environmental change during deglaciation, but tree rings offer potential for insight into high-resolution variability of weather/climate during this period. Wood preserved in the Great Lakes area by various fortuitous circumstances has been systematically collected over the last decade to improve our environmental understanding of the period from ca. 14,000 to 6000 years ago.

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