Bannister 110

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.

Spatial and temporal dynamics of forest water-carbon exchange in Northeastern U.S.

Here, we use annually resolved δ13C tree rings measurements across a NE-USA forest network to derive intercellurar CO2 (ci) response caused by increasing atmospheric CO2 (ca) trends and climate change over the past two decades, concurrent with direct long-term measurements of ecosystem carbon and water exchange. We find a substantial increase in ci suggesting that for each one 1 ppm increase in ca, ci increased proportionally or at the same rate. This response corresponds to static or moderate increase in water use efficiency-the ratio of carbon gain to water loss, respectively.

Soumaya Belmecheri Meeting

The Dendroarchaeology of Pueblo III Kiva Construction on Mesa Verde, Colorado

For a century, dendrochronology has provided Southwestern archaeology with the most precise and accurate prehistoric chronological controls available in the world. Being accurate to the calendar year, lacking statistical uncertainty, and having seasonal resolution, tree-ring dating provides the backbone of Southwestern chronology, especially on the Colorado Plateau. In addition, comprehensive dendroarchaeological data illuminate important aspects of the behavior of the people who produced the structures with which the wood specimens are associated.

ARCE-AZ annual meeting

ARCE-AZ annual meeting (5:30) and lecture (6:00)

GC 170A1 Honors /Preceptor class

Marana HS Tour

Retired Educators Tour

This is a private tour scheduled for retired educators and led b docent Randall Smith.

The Gold Throne of Tutankhamun

The “Gold Throne” (Carter object no. 91; Cairo JE 62028) is one of the best-known objects from the tomb of Tutankhamun (KV62). It is also one of the more intriguing, since its backrest scene shows clear evidence of having been altered in antiquity. What were the nature and extent of these changes? And what light do they shed on the complexities of the later Amarna Period?

Subscribe to Bannister 110