Editorial
Anthropogenic Nitrogen Deposition: Too Much or Too Little?: The answer is not as simple as some have portrayed it to be ... at both ends of the spectrum.

Medieval Warm Period Records of the Week
This issue's Medieval Warm Period Records of the Week come from the Columbia Icefield, Canadian Rockies, Canada and Mongan Bog, Central Ireland. To access the entire Medieval Warm Period Project's database, click here.

Subject Index Summary
Health Effects of Temperature (Hot vs. Cold Weather - South America): Which is by far the most insidious killer ... a little extra heat or a little dip in temperature?

Journal Reviews
More Evidence for Antarctic Ice Sheet Mass Gain: Like the ice itself, the evidence continues to accumulate.

A Precipitation History of the Southwestern United States: How has the available moisture of the region varied over the past few millennia?

Simulating the Past: A Test of State-of-the Art Climate Models: How well do they recreate the Sahel drought of the 1970s to 90s?

Another Strike Against the Progressive Nitrogen Limitation Hypothesis: In a study not primarily designed to test the PNL hypothesis, it is once again found to be inoperative.

Effects of Elevated CO2 and O3 on the Digestibility of Two Clover Species: What do each of the trace gases do individually? ... and what do they do together?