Thaw depth thaw line than clays. Yet another factors are the vegetation and the percentage of the soil organic matter, which influence the bulk density of the soil, and hence thermal conductivity. Thaw depth In soil science, the thaw depth or thaw line is the instantaneous level down to which the soil has warmed to zero degrees celcius. The active layer thickness is the maximum thaw depth over a period of two years. The layer of soil over the thaw depth is called the active layer, while the soil below is called permafrost. The term frost front refers to the varying position
Fifty Degrees Below Fifty Degrees Below Fifty Degrees Below (2005) is the second book in the hard science fiction "Science in the Capital" trilogy by Kim Stanley Robinson. It directly follows the events of "Forty Signs of Rain", with a greater focus on character Frank Vanderwal, and his decision to remain at the National Science Foundation, following the earlier novel’s superstorm and devastating flood of Washington D.C. The book, and series, looks mainly at possible mitigation and adaptation efforts that could be undertaken to combat the dangers of anthropogenic climate change, though mainly the plot focuses on an international effort to restart the