May 5, 2015

Causes and impacts of the 2014 warm anomaly in the NE Pacific

Bond, Nicholas A., Cronin, Meghan F., Freeland, Howard, Mantua, Nathan
Geophysical Research Letters
  • Summarizes the context stating that strongly positive temperature anomalies developed in the NE Pacific Ocean during the boreal winter of 2013–2014
  • States that these anomalies were caused by lower than normal rates of the loss of heat from the ocean to the atmosphere and of relatively weak cold advection in the upper ocean
  • States both of these mechanisms can be attributed to an unusually strong and persistent weather pattern featuring much higher than normal sea level pressure over the waters of interest
  • States the anomaly was the greatest observed in this region since at least the 1980s
  • States the region of warm sea surface temperature anomalies subsequently expanded and reached coastal waters in spring and summer 2014
  • Discusses impacts on fisheries and regional weather are discussed
  • Finds that sea surface temperature anomalies in this region affect air temperatures downwind in Washington state