Final answer:
The Atlantic Multidecadal Oscillation (AMO) is a prolonged warm period in the North Atlantic Ocean. It is associated with changes in sea surface temperatures and ocean circulation patterns.
Step-by-step explanation:
The Atlantic Multidecadal Oscillation (AMO) is a prolonged warm period in the North Atlantic Ocean that lasts for several decades. It is characterized by changes in sea surface temperatures and is associated with shifts in ocean circulation patterns. The cause of the AMO is still debated, but it is believed to be influenced by a combination of natural factors such as variations in solar radiation, volcanic activity, and changes in greenhouse gas concentrations.