Editorial
Rising Atmospheric CO2 Will Likely Boost Ocean Productivity: A nitrogen-fixing cyanobacterium appears to hold the key to the "greening" of the world's oceans.

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Victoria Land Coast, Antarctica.

Subject Index Summary
Climate Oscillations (Millennial Variability - South America): Has the Little Ice Age-to-Current Warm Period transition been nothing more than the most recent phase of a persistent millennial-scale natural oscillation of climate that is totally unrelated to the historical increase in the air's CO2 content? Studies from South America weigh in on the question.

Journal Reviews
A 5,000-Year History of Major Hurricane Activity in the Western North Atlantic Ocean: How was it obtained? ... and what does it reveal?

The Paleoclimatology of Lake Baikal: What does it reveal about millennial-scale oscillations and 20th-century global warming?

Scleractinian Corals: To Hell (Decalcification) and Back: If a coral looses its skeleton, can it grow it back again?

Global Warming and Atmospheric CO2 Enrichment: Impacts on Tree Bud-Burst: What are they? And are their consequences positive or negative?

Elevated Atmospheric CO2 Concentrations Enhance Marine Production of DMS and CH2CII: Is this something about which we should be worried or happy?