Efectos del calentamiento global POR REDACCIÓN NATIONAL GEOGRAPHIC El planeta se está calentando, desde el Polo Norte al Polo Sur, y en todas las áreas intermedias. Globalmente, el mercurio ya ha subido más de 1 grado Fahrenheit y aún más en las sensibles regiones polares. Y los efectos del aumento de la temperatura no llegarán en un futuro lejano. Se están produciendo justo ahora. Se observan los síntomas por todos lados y algunos de ellos son sorprendentes. El calor no solo está derritiendo los glaciares y el hielo del mar, también está cambiando los patrones de precipitaciones y haciendo que los animales se trasladen.
Ya se están produciendo algunos impactos del aumento de la temperatura.
El hielo se está derritiendo en todo el mundo, especialmente en los polos incluyendo los glaciares montañosos, las láminas de hielo que cubren el oeste de la Antártida y Groenlandia y el hielo del mar Ártico. El investigador Bill Fraser ha seguido el descenso de los pingüinos Adélie en la Antártida donde su número ha descendido de 32.000 parejas reproductoras a 11.000 en 30 años. El aumento del nivel del mar durante este último siglo ha sido más rápido. Algunas mariposas, zorros y plantas alpinas se han trasladado más al norte o a zonas más frías y elevadas. La media de las precipitaciones (lluvia y nieve) ha aumentado en todo el globo. Los escarabajos del abeto han experimentado un boom en Alaska gracias a 20 años de veranos cálidos. Los insectos han devorado 4 millones de acres de abetos. Estos son otros efectos que podrían darse a finales de este siglo si continúa el calentamiento:
Se espera que el nivel de los mares aumente entre 18 y 59 centímetros al final de este siglo y si los polos continúan derritiéndose, podrían aumentar entre 10 y 20 centímetros adicionales. Es probable que los huracanes y algunas otras tormentas se hagan más fuertes. Las especies que dependen unas de otras pueden perder la sincronización. Por ejemplo, las plantas podrían florecer antes de que los insectos que las polinizan sean activos. Las inundaciones y las sequías se harán más frecuentes. La lluvia en Etiopía, donde las sequías ya son habituales, podría descender un 10% durante los próximos 50 años. Habrá menos agua dulce disponible. Si la capa de hielo del Quelccaya en Perú continúa derritiéndose como hasta ahora, desaparecerá en 2100 dejando a miles de personas que cuentan con ella para conseguir agua potable y electricidad sin ninguna de las dos. Algunas enfermedades se extenderán, como la malaria llevada por los mosquitos. Los ecosistemas cambiarán, algunas especies se moverán más al norte o tendrán más éxito; otras no podrán trasladarse y podrían extinguirse. El científico investigador de la vida salvaje Martyn Obbard ha averiguado que, desde mediados de los años 80, con menos hielo donde vivir y pescar, los osos polares están considerablemente más delgados. El biólogo de osos polares Ian Stirling ha descubierto un patrón similar en la Bahía de Hudson. Él teme que, si el hielo del mar desaparece, los osos polares también desaparecerán.
ME PUEDEN DAR UN RESUMEN DE ESA LECTURA QUE ME LLENE UNA CARILLA DE CUADERNO XFAA PORFA Y SI PUEDEN QUE EL RESUMEN SEA EN INGLES
BY NATIONAL GEOGRAPHIC DRAFTING The planet is warming, from the North Pole to the South Pole, and in all areas in between. Globally, mercury has already risen more than 1 degree Fahrenheit and even higher in the sensitive polar regions. And the effects of rising temperatures will not come in the distant future. They are happening right now. The symptoms are everywhere and some of them are surprising. The heat is not only melting glaciers and sea ice, it is also changing rainfall patterns and causing animals to move around. Some impacts of rising temperatures are already taking place. Ice is melting around the world, especially at the poles including mountain glaciers, the sheets of ice that cover western Antarctica and Greenland, and Arctic sea ice. Researcher Bill Fraser has followed the decline of Adélie penguins in Antarctica where their numbers have dropped from 32,000 breeding pairs to 11,000 in 30 years. Sea level rise over the past century has been faster. Some butterflies, foxes and alpine plants have moved further north or to cooler and higher areas. Average precipitation (rain and snow) has increased across the globe. Fir beetles have boomed in Alaska thanks to 20 years of warm summers. Insects have eaten 4 million acres of fir trees. These are other effects that could occur later this century if warming continues: Sea levels are expected to rise 18 to 59 centimeters by the end of this century, and if the poles continue to melt, they could rise an additional 10 to 20 centimeters. Hurricanes and some other storms are likely to get stronger. Species that depend on each other can get out of sync. For example, plants could flower before the insects that pollinate them are active. Floods and droughts will become more frequent. Rain in Ethiopia, where droughts are already common, could fall by 10% over the next 50 years. There will be less fresh water available. If the Quelccaya ice sheet in Peru continues to melt as it has done now, it will disappear in 2100 leaving thousands of people who rely on it for clean water and electricity without either. Some diseases will spread, such as malaria carried byFoxes and alpine plants have moved further north or to colder, higher areas. Average precipitation (rain and snow) has increased across the globe. Fir beetles have boomed in Alaska thanks to 20 years of warm summers. Insects have eaten 4 million acres of fir trees. These are other effects that could occur later this century if warming continues: Sea levels are expected to rise 18 to 59 centimeters by the end of this century, and if the poles continue to melt, they could rise an additional 10 to 20 centimeters. Hurricanes and some other storms are likely to get stronger. Species that depend on each other can get out of sync. For example, plants could flower before the insects that pollinate them are active. Floods and droughts will become more frequent. Rain in Ethiopia, where droughts are already common, could fall by 10% over the next 50 years. There will be less fresh water available. If the Quelccaya ice sheet in Peru continues to melt as it has done now, it will disappear in 2100 leaving thousands of people who rely on it for clean water and electricity without either. Some diseases will spread, such as malaria carried by mosquitoes. Ecosystems will change, some species will move further north or be more successful; others will not be able to move and could be extinguished. Wildlife research scientist Martyn Obbard has found that since the mid-1980s, with less ice to live and fish on, polar bears are considerably thinner. Polar bear biologist Ian Stirling has discovered a similar pattern in Hudson Bay. He fears that if the sea ice disappears, the polar bears will
Respuesta:
BY NATIONAL GEOGRAPHIC DRAFTING The planet is warming, from the North Pole to the South Pole, and in all areas in between. Globally, mercury has already risen more than 1 degree Fahrenheit and even higher in the sensitive polar regions. And the effects of rising temperatures will not come in the distant future. They are happening right now. The symptoms are everywhere and some of them are surprising. The heat is not only melting glaciers and sea ice, it is also changing rainfall patterns and causing animals to move around. Some impacts of rising temperatures are already taking place. Ice is melting around the world, especially at the poles including mountain glaciers, the sheets of ice that cover western Antarctica and Greenland, and Arctic sea ice. Researcher Bill Fraser has followed the decline of Adélie penguins in Antarctica where their numbers have dropped from 32,000 breeding pairs to 11,000 in 30 years. Sea level rise over the past century has been faster. Some butterflies, foxes and alpine plants have moved further north or to cooler and higher areas. Average precipitation (rain and snow) has increased across the globe. Fir beetles have boomed in Alaska thanks to 20 years of warm summers. Insects have eaten 4 million acres of fir trees. These are other effects that could occur later this century if warming continues: Sea levels are expected to rise 18 to 59 centimeters by the end of this century, and if the poles continue to melt, they could rise an additional 10 to 20 centimeters. Hurricanes and some other storms are likely to get stronger. Species that depend on each other can get out of sync. For example, plants could flower before the insects that pollinate them are active. Floods and droughts will become more frequent. Rain in Ethiopia, where droughts are already common, could fall by 10% over the next 50 years. There will be less fresh water available. If the Quelccaya ice sheet in Peru continues to melt as it has done now, it will disappear in 2100 leaving thousands of people who rely on it for clean water and electricity without either. Some diseases will spread, such as malaria carried byFoxes and alpine plants have moved further north or to colder, higher areas. Average precipitation (rain and snow) has increased across the globe. Fir beetles have boomed in Alaska thanks to 20 years of warm summers. Insects have eaten 4 million acres of fir trees. These are other effects that could occur later this century if warming continues: Sea levels are expected to rise 18 to 59 centimeters by the end of this century, and if the poles continue to melt, they could rise an additional 10 to 20 centimeters. Hurricanes and some other storms are likely to get stronger. Species that depend on each other can get out of sync. For example, plants could flower before the insects that pollinate them are active. Floods and droughts will become more frequent. Rain in Ethiopia, where droughts are already common, could fall by 10% over the next 50 years. There will be less fresh water available. If the Quelccaya ice sheet in Peru continues to melt as it has done now, it will disappear in 2100 leaving thousands of people who rely on it for clean water and electricity without either. Some diseases will spread, such as malaria carried by mosquitoes. Ecosystems will change, some species will move further north or be more successful; others will not be able to move and could be extinguished. Wildlife research scientist Martyn Obbard has found that since the mid-1980s, with less ice to live and fish on, polar bears are considerably thinner. Polar bear biologist Ian Stirling has discovered a similar pattern in Hudson Bay. He fears that if the sea ice disappears, the polar bears will