So did climate change cause Sandy? No: there is absolutely no evidence that it did. In fact, several future modeling studies suggest climate change may actually *decrease* hurricane frequency (although increasing the number of Cat 4 and 5 storms).
Second, while climate change more than likely exacerbated the impacts of the storm, the influence of climate change on sea level and ocean temperature is clearly *less than* natural variability at this time.
18 minutes ago