El clima hacia 2030. La geomorfología como proxy en el cambio climático
Authors: Roque García Ruiz, Eduardo Garcia Romero
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In the last millennium, the variation of temperature and climatic conditions are reported by
mankind in narrative and written form, verified with results through recent investigations at proxies in ice cores, rings of trees,accumulationof sediments,and carbonaceous deposits, to which we must add geomorphological proxies in general not analyzed or reported in their relationship with climatic conditions. The archaeological excavations show the climatic conditions of the event, first by concealment and second, by the contrast with the landscape that currently controls the sector and the one that should have existed for the sustainable development of the community. The geomorphological proxies are mainly related to slope stability problems that leave topographic shapes in amphitheatres, as well as a large volume of materials transported downstream due to this instability and deposited by changing the velocity in the flow, forming a smooth relief surface, which they have hidden civilizations and allowed the habitat to new civilizations. The stability problems on the slopes are related to rain, whose intensity and duration will depend on the magnitude of the change in the relief. The variation of temperature in the last millennium presents a cycle that can be associated in three periods: between the years 950 to 1150 AD, it can be assigned to a period of high temperatures (THP), followed by a warm climatic stabilization, corresponding to the warm period medieval (MCP) that extends until the year 1450, where the small ice age (LEI) begins until the year 1900. Taking into account the development from the twelfth century of the Inca empire, some crop areas on Easter island developed circa 1200 and the buildings of the current Rome from the thirteenth century, it is concluded that the high temperature in the THP period, followed by periods of heavy rains, caused stability problems, hiding those structures during the eleventh and twelfth centuries. When we have high temperatures (THP), evaporation must be high, with dry water balance, but its descent must be associated with cooling, possibly originating from rains whose duration, frequency and intensity values must be greater than those currently known. , with humid water balances, increasing high flow rates and large sediment inputs, as well as an important volume of water accumulated in the subsoil. According to current research and reports, 2017, the two large oceans, Pacific and Atlantic, which occupy 48% of the earth's surface, will present important variations in their temperature conditions, which should affect the water mass balance in the world climate, possibly more intense cold towards the subpolar areas and intensification of the rains towards the tropics.