warning signal

Perhaps it is best to view them as warning signals.

A better understanding of the various tipping points and, above all, their typical early warning signals could prove essential for further climate change research and modeling.

While early warning signals have been applied to ecology and psychology for the last two decades, little research has focused on how those signals are connected within a network, Masuda says.

Early warning signals might be unable to distinguish the degree of severity of the ensuing tipping points.

Donald Wright, the vice president for maintenance and engineering for Alaska Airlines, told The New York Times the warning signals had come on twice in the preceding 10 days.