Photo courtesy of NASA
by Breanna Draxler
Global temperatures are set to rise, even though a newly discovered heat sink puts it off for a few years.
Scientists at the National Center for Atmospheric Research released an analysis last Tuesday that determined that deep ocean waters absorb atmospheric heat. This results in a decade-long lag time between rising heat input and rising air temperatures.
It’s as though the earth has rented an underwater storage unit for its excess heat. The lease is good for 10 years, after which time the heat will be up for grabs. And the atmosphere is predicted to be the highest bidder.
NCAR scientists say the past decade has been an example of this 10-year heat storage lease in action. Greenhouse gases have been on the rise since the turn of the century, and more solar heat is entering the atmosphere than is leaving through radiation. That means there is more heat in the system today, yet global air temperature has increased only minimally. This “missing heat” was unaccounted for until scientists started looking for a deep ocean reservoir for heat.
To find that deepwater sink, scientists used Supercomputer simulations of global temperatures to examine the complex climatic interplays of atmosphere, land, oceans and sea ice. From these, they concluded that the “missing” heat is being held in ocean water at depths below 1,000 feet.
The scientists predict this lease on underwater heat storage to have a 10-year limit. So while scientists predict more of these short-term plateaus on the graph of global temperatures in the future, overall temperature will continue to rise.