Welcome to the Tree Pulse Network

Trees go through cycles of stem expansion and contraction that we refer to here as pulses. They are related to the amount of water contained in the tree. They reflect the active and passive water-balance mechanisms trees rely on to function in a dynamical environment.

Pulses occur across scales: from minutes to decades, from one individual tree to the whole forest.

Each tree pulse acts like a pump. Collectively, trees power significant water exchanges between the soil and the atmosphere and thus play a central role in Earth’s energy budget. What are the time-space properties of this network of pumps? How do the properties respond to environmental changes? Can we predict their evolution? Could we control them?

Substantial observations are required to answer these critical questions. The Tree Pulse Network aims to collect consistent, widespread and long-term measurements of tree-diameter pulsations in response to local environmental changes around the globe.

Check out the map, project information and help us grow the network!