Paul Szejner, PhD

Outreach

Trees, water, carbon and the stories recorded in wood

Tree Ring Isotopes

Videos exploring how trees use carbon and water, what stable isotopes can tell us, and how tree rings record environmental change.

Carbon isotopes in plants

Watch on YouTube

Oxygen stable isotopes: from rain to plants

Watch on YouTube

More talks and videos

The channel also includes talks on forests and summer rainfall, and a seminar at the Instituto de Geología, Universidad Nacional Autónoma de México.

Tree Ring Isotopes on YouTube

Forest landscapes & details

Pines and sandstone formations in a canyon landscape — Pines among sandstone formations.

Autumn foliage across a mountain valley — Autumn in a mountain forest.

A pine growing against an orange rock face — A pine growing from the rock face.

Close-up of weathered bark and exposed wood grain — Patterns in bark and wood.