Why is it so warm in the North Atlantic?
The overall recent warming of the North Atlantic, particularly in the northeastern sector and the Atlantic Main Tropical Cyclone Development Region may be, in large part, due a combination of the Atlantic Multi-decadal Oscillation (AMO) being in its warm phase which raises the base sea surface temperatures in the North Atlantic and warming resulting from the recent reduced trade winds in the tropics
Sea surface temperature (SST) anomalies in the Tropical North Atlantic have been increasing since April due mainly to a weakening and southward displacement of the Azores-Bermuda ridge.
This weakening has reduced the trade winds.
The dominant cause of the warm SSTs is due to weather patterns that reduced surface wind speed, which reduced evaporative cooling, and less cloudiness.
Other factors such as lower amount of sulfate particles from cleaner shipping fuels, Hunga-Tonga eruption, and low levels of African dust likely only had a minor role.
Since late June, the Azores-Bermuda ridge has begun to restrengthen and SSTs have fallen, however, they remain warmer than normal.
See more here oceanweatherservices.com
Please Donate Below To Support Our Ongoing Work To Defend The Scientific Method
PRINCIPIA SCIENTIFIC INTERNATIONAL, legally registered in the UK as a company 
incorporated for charitable purposes. Head Office: 27 Old Gloucester Street, London WC1N 3AX.
Trackback from your site.
Koen Vogel
| #
The reason for recent warming cannot be less cooling, because what is warming the North Atlantic in the first place. It’s a key question because the IPCC have identified the Arctic and the North Atlantic are bellwethers for the 1908-1943 and 1995-present global warming events. You forget to mention an obvious candidate: changes in geothermal heat flux at the mid-Atlantic ridge,, which shows a high degree of correlation to global (and therefore also Arctic and North Atlantic) temperature variability
Reply