{"id":20173,"date":"2016-08-27T14:01:45","date_gmt":"2016-08-27T17:01:45","guid":{"rendered":"http:\/\/patagoniambiental.com.ar\/?p=20173"},"modified":"2016-08-27T14:01:45","modified_gmt":"2016-08-27T17:01:45","slug":"los-cientificos-descubren-que-el-cambio-climatico-no-arranco-en-el-siglo-xx","status":"publish","type":"post","link":"https:\/\/patagoniambiental.com.ar\/info\/los-cientificos-descubren-que-el-cambio-climatico-no-arranco-en-el-siglo-xx\/","title":{"rendered":"Los cient\u00edficos descubren que el cambio clim\u00e1tico no arranc\u00f3 en el siglo XX"},"content":{"rendered":"
La actividad humana lleva produciendo calentamiento global desde hace casi dos siglos, seg\u00fan una nueva investigaci\u00f3n que prueba que este fen\u00f3meno no se ha desencadenado durante el siglo XX.<\/div>\n
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El investigador principal, la profesora asociada Nerilie Abram<\/strong> de la Universidad Nacional de Australia (ANU), dijo que el estudio encontr\u00f3 que el calentamiento comenz\u00f3 durante las primeras etapas de la revoluci\u00f3n industrial y fue detectable por primera vez en los oc\u00e9anos \u00c1rtico y tropicales en el decenio de 1830, mucho antes de lo que esperaban los cient\u00edficos.<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u00abFue un hallazgo extraordinario\u00bb, dijo Abram, de la Escuela de Investigaci\u00f3n de Ciencias de la Tierra de la ANU y el Centro ARC de Excelencia para la Ciencia del Sistema Clim\u00e1tico.<\/p>\n

\u00abFue uno de esos momentos donde la ciencia realmente nos sorprendi\u00f3. Los resultados son claros. El calentamiento clim\u00e1tico que estamos presenciando hoy comenz\u00f3 hace unos 180 a\u00f1os.\u00bb<\/p>\n

Los nuevos hallazgos tienen implicaciones significativas para evaluar la medida en que los seres humanos han hecho que el clima se aleje del estado pre-industrial, y ayudar\u00e1n a los cient\u00edficos a comprender el impacto futuro de las emisiones de gases de invernadero en el clima.<\/p>\n

\u00abEn los oc\u00e9anos tropicales y el \u00c1rtico en particular, los 180 a\u00f1os de calentamiento han causado que el clima medio sobrepase la variabilidad normal en los siglos anteriores a la revoluci\u00f3n industrial,\u00bb explica Abram.<\/p>\n

La investigaci\u00f3n, publicada en la revista Nature, ha sido realizada por 25 cient\u00edficos de Australia, Estados Unidos, Europa y Asia, trabajando juntos como parte del consorcio Past Global Changes 2000 year (PAGES 2K).<\/p>\n

Abram declar\u00f3 que el cambio clim\u00e1tico antropog\u00e9nico era generalmente visto como un fen\u00f3meno del siglo 20, debido a que las mediciones clim\u00e1ticas eran poco frecuentes antes de la d\u00e9cada de 1900.<\/p>\n

Sin embargo, el equipo estudi\u00f3 reconstrucciones detalladas del clima pasado que abarcan 500 a\u00f1os para identificar cuando la tendencia sostenida al calentamiento comenz\u00f3 realmente.<\/p>\n

Los cient\u00edficos examinaron los registros de las variaciones clim\u00e1ticas naturales a trav\u00e9s de oc\u00e9anos y continentes de todo el mundo. Estas historias clim\u00e1ticas aparecen preservadas en los corales, decoraciones de cuevas, anillos de \u00e1rboles y n\u00facleos de hielo.<\/p>\n

El equipo de investigaci\u00f3n analiz\u00f3 miles de a\u00f1os de simulaciones de modelos clim\u00e1ticos, incluidos los experimentos utilizados para el \u00faltimo informe del Panel Intergubernamental de las Naciones Unidas sobre el Cambio Clim\u00e1tico (IPCC), para determinar qu\u00e9 caus\u00f3 el calentamiento temprano.<\/p>\n

Los datos y simulaciones identificaron la aparici\u00f3n temprana del calentamiento alrededor de la d\u00e9cada de 1830, y encontraron que el calentamiento temprano se atribuy\u00f3 a los crecientes niveles de gases de efecto invernadero.<\/p>\n

Los investigadores estudiaron la mayor\u00eda de las erupciones volc\u00e1nicas a principios del siglo XIX y se encontr\u00f3 que s\u00f3lo eran un factor de menor importancia en el inicio temprano del calentamiento clim\u00e1tico.<\/p>\n<\/div>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

La actividad humana lleva produciendo calentamiento global desde hace casi dos siglos, seg\u00fan una nueva investigaci\u00f3n que prueba que este 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