hydrosphere

Changing Atmosphere Affects How Much Water Trees Need

Above the forest canopy: looking down at the trees from a Michigan eddy-covariance tower.

Spurred by increasing levels of atmospheric carbon dioxide, forests over the last two decades have become dramatically more efficient in how they use water. Scientists affiliated with the National Science Foundation's (NSF) Harvard Forest Long-Term Ecological Research (LTER) site report the results in this week's issue of the journal Nature.

See the following articles:

NOVA Program - Earth from Space

From PBS-NOVA:  Earth From Space is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. Produced in extensive consultation with NASA scientists, NOVA takes data from earth-observing satellites and transforms it into dazzling visual sequences, each one exposing the intricate and surprising web of forces that sustains life on earth.

Impacts of Ocean Acidification on Marine Life

Young bivalves such as oysters, coral reefs, and other organisms that rely on calcite or aragonite to grow their shells and structures are fighting a battle with ocean acidification. We provide links to several recent articles on the issue, which would serve as an excellent topic for a classroom discussion or writing exercise.

Background Article: Larvae, Climate and Calcification

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