However, to support the assertion that global
warming is responsible for a great deal of damage from such events, it is sufficient to show that such events have the «signature» of global
warming — for example, that specific global
warming - related factors such as
abnormally high sea
surface temperatures, elevated water vapor levels, and altered jet stream patterns contributed to making Hurricane Sandy what it was — even if those factors can not be precisely quantified.
The movement of the Pacific's
warm water pulled heat away from the
surface waters and this led to the
abnormally cool
surface temperatures observed during the last ten years.