Midlatitude Marine Heatwaves: Forcing and Impacts

Feb. 2014 MODIS Sea Surface Temperature (SST) relative to the NCEP OI v2 SST climatology (1982-2015). The SST anomalies range from -2C (dark blue) to +2C (dark red). Credit K. Karnauskas.

Last Updated:
6 June 2017
*This is a Joint Special Collection* 
The following journals are accepting submissions: Geophysical Research Letters, JGR Oceans, JGR Biogeosciences, and JGR Atmospheres.


Persistent, midlatitude marine heatwaves (MHWs), such as the 2013-2014 extreme warming of the Northeastern Pacific (aka “the Blob”), can have dramatic and widespread impacts on ecosystems, fisheries and weather. MHWs have been observed in both hemispheres (e.g., the Ningaloo Niño in Western Australia), including in semi-enclosed basins such as the Mediterranean Sea. MHWs can be caused by a combination of atmospheric and oceanographic processes. It is also expected that they will become more frequent and intense under anthropogenic climate change. This Special Collection welcomes papers investigating the causes, evolution, and impacts of persistent midlatitude MHWs.
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