The Effects of Ocean Acidification on Coral A Comparison between the Alkalinity Anomaly and Buoyant Weight Methods of Measurement. Aaron Cevallos Advisor: Andreas Andersson , Ph.D. Summer 2010. What is ocean acidification? What is causing it?.
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The Effects of Ocean Acidification on CoralA Comparison between the Alkalinity Anomaly and Buoyant Weight Methods of Measurement
Advisor: Andreas Andersson, Ph.D.
What is ocean acidification? What is causing it?
Evidence of ocean acidification at BATS
Bermuda coral reef: the canary in a coal mine?
Buddemeier et al. 2004, based on Veron 1995
[CO32-] across coral reef platform
-No major industries or pollution
-Natural gradient in [CO32-]
What can we expect in the future ?
Changes in atmospheric CO2 under the "business as usual" scenario to the year 2100 and associated changes in ocean pH and carbon chemistry. Adapted from Wolf-gladrow et al., 1999
Why is ocean acidification a problem?
†Ca2+ is the other building block, but there are plenty of calcium in seawater
The Alkalinity Anomaly Method
Average Daytime vs. Nighttime Calcification Rates
The Buoyant Weighing Method
Calcification (or dissolution) of a coral sample is inferred from changes in the sample’s mass. The weight can be determined in water using the formula: Wa= Ww / [1-(pw/ps)]
AA Predicted Weight Change vs. BW Actual Weight Change