Marc Oliva University of Lisbon, Portugal The World Climate Research Program (WCRP) and the IPCC Working Group 1 (Fourth Assessment Report) recognize the Cryosphere as one of the most significant challenges of climate science and as a major source of uncertainty in global climate projections. While the permafrost carbon feedback has been identified as …[Read More]
cold regions
Cold soil in the groove
Often, soils from cold regions, such as Arctic soils, show polygonal forms in their surface. These polygons are formed because of the freeze-thaw cycle, characteristic of permafrost. What is permafrost? Permafrost is a subsurface soil layer which stays permanently frozen (below 0 oC) during long periods of time, usually more than two consecutive years. Most extensive …[Read More]