Bannister 110

Diné forests: unraveling early warning signs in tree rings

Diné forests face escalating challenges from changing climate, impacting forest health and resilience. Tree rings collected within a forestry inventory are enhancing our understanding of forest dynamics on the Navajo Nation. In this presentation, we share the results of this study, conducted in partnership with the Navajo Forestry Department (NFD), combining dendrochronological analyses and forest inventory by employing a stratified random subsample of NFD’s Continuous Forest Inventory to assess the responses of Diné forests to climate variability.

Committee (Anderson defense)

Setup for Anderson defense

Talia Anderson defense: “Rainfall variability, extreme events, and climate information in the Central American Dry Corridor”

AV check for Lorenzo defense

Signs of climatic variation in the width and density of P. hartwegii tree-rings at the ends of its elevational gradient in the mountains of central Mexico

Trees in alpine forests, being sessile and long-lived organisms, are exposed to intra- and inter-annual climatic variation, which is recorded in their growth rings. Specifically, trees growing at the ends of their natural distribution are the most affected due to in those sites the conditions are marginal and adverse for their development and growth. The objective was to evaluate how interannual climatic variation affects the width (RW) and density (RD) of tree-ring formation of P.

Towner Meeting

Eastern North Pacific tropical cyclone influences on southwestern North America

The eastern North Pacific (ENP) basin boasts a high density of tropical cyclone (TC) formation compared with other ocean basins in which TCs occur. Since ENP TCs can form near or otherwise impact land, they serve as an important yet variable source of summer and fall precipitation in southwestern North America. Higher sea surface temperatures (SSTs) and reduced vertical wind shear associated with El Niño events tend to support increased TC activity, exemplified by the very active 2015 ENP hurricane season.

Dendro Down Under: Expanding Tree-Ring Research in Australia

In this seminar Heather will discuss her adventures in undertaking dendrochronology in Australia with a focus on three area of dendrochronological studies.

Lorenzo Defence (Hydrology)

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