Tree-Ring Talk

Cedar of Lebanon (Made in Anatolia): Dendroprovenancing Timbers in the Late Ottoman Port of Jaffa

The Anatolian cedar forests were an important source of timber for the Ottoman Empire, particularly in timber-starved provinces like Palestine and Egypt.  I present here results from a study using dendrochronology to date and provenance cedar timbers from two 19th century Ottoman buildings in the Palestinian port of Jaffa.  These results, combined with information from the historical record and dendrochronological data from other Ottoman sites in the eastern Mediterranean, demonstrate that these cedars were imported from Anatolia and were part of a far-reaching maritime and overland trade n

What We Did this Summer

A rather informal, multi-person “what-I-did-this-summer” brown-bag. A chance for Tree-Ring Lab people to reconnect, welcome new colleagues, and learn about the fascinating things that happen in our research worlds.

Calibrating Time Lags in Archaeological Tree-Ring Dating: the Colorado Old Wood Project, Phase I: Douglas Creek Arch and the Uncompahgre Plateau

Archaeologists have long been aware of the potential for serious overestimation of site ages based on radiocarbon and tree-ring dates from certain archaeological contexts. The “old wood problem” arises from the human use of deadwood elements for various purposes and the fact that trees are long-lived plants whose rings date to the years in which they were grown rather than to the years in which the organisms died. Despite a fairly unfocused concern with this issue, little effort has been devoted to quantifying the magnitude of the problem.

Shifting from Local to Landscape Controls of Disturbance Size and Severity: A Tree-Ring Reconstruction of Fire, Spruce Beetle Outbreaks, and Species Dynamics of the Pinaleño Mountains

Forest disturbances exert a strong control over species composition and structure. In the Sky Islands of the American Southwest, steep elevation gradients give rise to moisture and temperature gradients that support a diverse array of forest types and disturbance regimes in a relatively small geographic area.

A new perspective on drought history in the Four Corners: cool- and monsoon-season precipitation reconstructions for the Hopi and Navajo tribal lands

For well over a decade, the Hopi Tribe and Navajo Nation located in northeastern Arizona have suffered the effects of persistent drought conditions. Severe dry spells have critically impacted natural ecosystems, water resources, and regional livelihoods including dryland farming and ranching. Drought planning and resource management efforts in the region are based largely on the instrumental record of climate, which contains a limited number of severe, sustained droughts.

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