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Scientists mark 1/3 of a century of satellite climate data
..."While [this] warming is noticeable in climate terms, it isn't obvious that it represents an impending disaster," says Christy. "The climate models produce some aspects of the weather reasonably well, but they have yet to demonstrate an ability to confidently predict climate change in upper air temperatures."...

...How much of the remaining warming is due to natural climate cycles (not including volcanoes) versus humanity's carbon dioxide emissions enhancing Earth's natural greenhouse effect?

"That is the Holy Grail of climatology," says Spencer. "How much of that underlying trend is due to greenhouse gases? While many scientists believe it is almost entirely due to humans, that view cannot be proved scientifically."...