This issue's cover: Sampling soils of ice wedge polygons on the North Slope of Alaska with a pingo in the background. See "Characterization of Soil Organic Matter Fractions of Tundra Soils in Arctic Alaska by Carbon-13 Nuclear Magnetic Resonance Spectroscopy" by X.Y. Dai, C.L. Ping, R. Candler, L. Haumaier, and W. Zech, p. 87-93.