Dean_175 wrote:Sciencerocks wrote:https://twitter.com/AlexSKolker/status/1668953937402052609?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1668953937402052609%7Ctwgr%5E%7Ctwcon%5Es1_&ref_url=
The question is will the Atlantic nino counter the pacific one to allow for a more active season?
That arrow in the Atlantic points to warm anomalies north of the equator. I have never heard of this Atlantic Nino Dakar. Is it the same thing as the traditional Atlantic Nino/equatorial mode that is located in the Atlantic and centered on the equator like regular ENSO or is it a some sort of different phenomenon involving temperature anomalies further north?
For those that don't know: the Atlantic has an analog of ENSO located along the equator. It doesn't really cycle - likely because it doesn't couple with the annual climatology as well as ENSO does with the Atlantic being smaller in width (it takes much less than a year for transfer of warmth to occur between Africa and SAmerica) and because it is much weaker than ENSO and gets dominated by other factors. As a result it is instead more episodic. Early 1997 is a good example of a relatively robust "Atlantic Nina". It is wind/convection driven (similar to ENSO and unlike the AMO) but because of the small size of the equatorial Atlantic, is more of a curiosity than a signal with strong influence on global climate or hurricane activity.
This region of the very warm Atlantic is also looking at 22-26C, anomalies is relative. It doesn't have the energy budget to influence tropical convection the way the equatorial Pacific is, in particular the central regions where we're discussing 26C or greater.