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Published: Tuesday 27 August, 2013

michael kors purses outlet online michael kors purses outlet online Extreme heat is covering more of Earth

Dont M michael kors purses outlet online iss:Readers Choice 2013June happeningsmySpy: Texas ComiconDream Home: Beauty exudes old world charm90s Pop StarsComics GamesThe percentage of Earths land surface covered by extreme heat in summer has soared in recent decades, from less than 1 percent before 1980 to as much as 13 percent in recent years, a new scientific paper says.

The change is so drastic, the paper says, scientists can claim with near certainty that events like the Texas heat wave last year, the Russian heat wave of 2010 and the European heat wave of 2003 wouldnt have occurred without planetary warming caused by humans release of greenhouse gases.

The main thing is just to look at the statistics and see that the change is too large to be natural, Hansen said in an interview.

The findings provoked an immediate split among his scientific colleagues, however.

Some experts said he had come up with a smart new way of understanding the magnitude of the heat extremes that people around the world are noticing.

Others suggested he had presented a weak statistical case for his boldest claims and the rest of the paper contained little that had not been observed in the scientific literature for years.

The divide is characteristic of the strong reactions Hansen has elicited playing dual roles in the debate over climate change and how to combat it.

As the head of the in Manhattan, he is one of NASAs principal climate scientists and the primary custodian of its records of Earths temperature.

Yet he has also become an activist who marches in protests to demand new government policies on energy and climate.

Climatechange skeptics routinely accuse Hansen of manipulating the temperature record to make global warming seem more serious, though there is no proof hes done so and the warming trend has repeatedly been confirmed by other researchers.

Scientists have long believed that the warming roughly 2.5 degrees Fahrenheit over land in the past century, with most of that occurring since 1980 was caused largely by the human release of greenhouse gases from burning fossil fuels.

Such emissions have increased the likelihood of heat waves and some other typ michael kors purses outlet online es of weather extremes such as heavy rains and snowstorms, they say.

But researchers have struggled with the question of whether any particular heat wave or storm can be definitively linked to humaninduced climate change.

They computed how much of Earths land surface in each period was subjected in June, July and August to heat that would have been considered particularly extreme in the period from 1951 to 1980. In that era, they found, only 0.2 percent of the land surface was subjected to extreme summer heat. B michael kors purses outlet online ut from 2006 to 2011, extreme heat covered 4 percent to 13 percent of the world, they found. michael kors purses outlet online