"The tasks now are to look at the relative contributions of natural variability, " he said.
BBC: West Antarctic Ice Sheet warming twice earlier estimate
If peak acidities rather than long-term averages are what matters most, natural variability could make things worse.
Researchers are still struggling to disentangle the effects of man-made emissions of carbon dioxide from the natural variability of the climate.
"Longer term we will see a trend to drier summers but superimposed on that we will always see natural variability, " she said.
But the usual causes of natural variability do not seem to explain the current trend, so scientists incline to the view that it is man-made.
He believes the current warming trend is the result of natural variability, where a planet goes through phases of warming and cooling and the human contribution to it is minimal.
The five-year mean global temperature has been flat for the last decade, which we interpret as a combination of natural variability and a slow down in the growth rate of net climate forcing.
FORBES: Yes! We Should Defund The U.N.'s Intergovernmental Panel On Climate Change
In theory, climate models should help tease out which of these indirect effects is playing the biggest role, and also say how much of the decline in ice cover can be assigned to natural variability and how much to feedback loops in which a little warming leads to a lot more.
ECONOMIST: Summer ice in the Arctic Ocean is vanishing rapidly
Natural climate variability, from seasonal to multi-year scale, has produced significant effects in the Latin American countries, which suggests that climatic change projections constitute an important element for national and regional planning.
Wintertime Antarctic sea ice has been increasing at a small rate and with substantial natural year-to-year variability.
FORBES: On Romney's 'Rising Oceans', Time To Get A Bigger Boat
"The sample test results you provided are well within the variability of the all-natural brewing process and all in full compliance with all alcohol labeling laws, as we noted, " Peter Kraemer, vice president of brewing and supply for Anheuser-Busch, told CNN.
应用推荐