Sharp thermal contrast across the Pacific Ocean was characteristic of the global SSTA analysis for October 2021. Featured is developing La Nina and a lengthy cool phase of the Pacific decadal oscillation which is intensifying. Meanwhile "warm blobs" of SSTA common the past 10 years are prevailing near the Dateline in both hemispheres across the Pacific!

Upper ocean heat in the eastern equatorial Pacific plunges to the lowest level since September 2010. Indicated is plenty of fuel to allow La Nina to intensify which it will likely to peak in December.