Resultado de búsqueda
23 de jun. de 2024 · Permafrost forms and exists in a climate where the mean annual air temperature is 0 °C or colder. Such a climate is generally characterized by long cold winters with little snow and short, relatively dry, cool summers. Permafrost, therefore, is widespread in the Arctic, subarctic, and Antarctica.
23 de jun. de 2024 · Intense seasonal frost action, repeated freezing and thawing throughout the year, produces small-scale patterned ground. Repetitive freezing and thawing tends to stir and sort granular sediments, thus forming circles, stone nets, and polygons a few centimetres to 6 metres (20 feet) in diameter.
28 de jun. de 2024 · Un hallazgo asombroso ha surgido del permafrost siberiano: un lobo antiguo de 44.000 años ha sido descubierto en la región de Yakutia, en el este de Rusia.
27 de jun. de 2024 · Permafrost usually lies below an “active layer” of ground that freezes and thaws every year with seasonal changes in temperature. 1 Permafrost occurs in many different forms with various amounts of ice (continuous and discontinuous) and is mainly found in areas near the Arctic.
7 de jul. de 2024 · El deshielo del permafrost ya pone en un brete el objetivo, anunciado por el acuerdo de París, de limitar el calentamiento global a menos de +1,5 ºC respecto a la era preindustrial, según un estudio publicado en septiembre.
18 de jun. de 2024 · Permafrost, la tierra helada que cubre aproximadamente una cuarta parte del hemisferio norteatrapa una enorme cantidad de carbono que calienta el planeta. 2,5 veces la cantidad que hay actualmente en la atmósfera.
23 de jun. de 2024 · The permafrost table must be chilled to −15 to −20 °C (5 to −4 °F) for contraction cracks to form. On the average, it is assumed that ice wedges generally grow in a climate where the mean annual air temperature is −6 or −8 °C (21 or 18 °F) or colder.
