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California is now in the midst of the third year of one of its worst droughts on record. As our planet gradually warms from our rampant burning of fossil fuels, it’s only natural to wonder what role climate change has played in California’s troubles.

The answer is this: At present, the scientific evidence does not support an argument that the drought there is appreciably linked to human-induced climate change.

The drought has many attributes of historical droughts over that region — in particular, a lack of storms and rainfall that would normally arrive from the Pacific Ocean with considerable frequency. It resembles the droughts that afflicted the state in 1976 and 1977.…  Seguir leyendo »

El calentamiento de la atmósfera y el consecuente cambio de sus patrones de funcionamiento, lo que se llama cambio climático, ocupó de forma relevante las informaciones de muchos medios de comunicación del año 2007. El informe del grupo de expertos de la ONU y la Organización Meteorológica Mundial, que hace justo un año dio a conocer en Valencia el resumen de poco más de 30 páginas que destilaba los estudios de miles de científicos de todo el mundo, ponía de relieve la constatación genéricamente aceptada del calentamiento de la superficie terrestre a causa de la continua emisión a la atmósfera de gases con efecto invernadero a consecuencia de las actividades humanas y, sobre todo, la urgencia de actuar frente a este problema, dada la gran inercia que tienen los sistemas naturales y la sociedad de cambiar sus patrones de comportamiento.…  Seguir leyendo »

By Polly Toynbee (THE GUARDIAN, 23/05/06):

From the control tower of the Thames barrier, gaze down on one of London's heroic wonders. Those gigantic silver sails stretching half a mile across the river float above the water, standing guard against the rising risk of flood. Here global warming is measured by how often the steel gates are closed; in 1987, it was only once every two years: now it's four times a year, eight times more often. By the century's end the barrier will close 300 times a year at this pace of climate change.

The river is rising 6.6mm a year, with more storms and extremes as ice caps melt.…  Seguir leyendo »