Estimating Ecosystem Water Use

For more than a decade, U.S. Forest Service and Chinese scientists have collaborated to understand how human activities affect carbon and water cycles in managed ecosystems. Working through the U.S.-China Carbon Consortium, scientists share data from a network of eddy covariance flux towers across the two countries. The towers measure the flow of water vapor,…  More 

Forests, Water, Climate, and Management

Across the globe, forests cover about a quarter of all land and are important sources of clean water. A new book, edited by U.S. Forest Service Southern Research Station (SRS) scientist Devendra Amatya, examines the interactions between forests, water, climate, and management. The book, Forest Hydrology: Processes, Management and Assessment, was recently published by the…  More 

Open or Shut: How Trees Respond to Drought at the Leaf Level

Trees pull water into their roots, where some of it moves up the trunk against the pull of gravity. This upward movement, which is described by the cohesion-tension theory, is possible because of the chemical nature of water. Water molecules are attracted to each other (cohesion), so just before a water molecule evaporates from the…  More 

International Evapotranspiration Symposium: April 7 – 10, 2014, Raleigh, NC

  Register now for Evapotranspiration: Challenges in Measurement and Modeling from the Leaf to the Landscape Scale and Beyond. An important part of the hydrologic water cycle is plant water use (transpiration) and evaporation from earth and ocean surfaces. Together, these two processes are called evapotranspiration. Scientists and engineers studying climate, ecosystem productivity, water use,…  More