Fig. 2From: Black carbon in urban soils: land use and climate drive variation at the surfaceHistograms of soil black carbon (BC), total organic carbon (TOC) content (bins are 5 mg/g), and the contribution of BC to TOC (bins are 5 percent) across all sample depths, 0–10 cm depth (inset), and 10–20 cm depth (inset). Summary statistics include minimum, maximum, mean, and median. Note difference in y-axis scalesBack to article page