Modoki - Same But Different But Nothing New
Research published today in Nature has identified a new type of El Niño climate anomaly that is occurring with more and more frequency as a consequence of human-induced global warming.
Obviously I haven't read the Nature paper which firmly points the finger at us for stirring up the Pacific - one outcome could be worsening droughts in India and Australia.
It could also cause more severe hurricanes in the Caribbean and US, since El Nino is known to hamper the development of tropical cyclones.
The changing ocean events may even have an impact on the UK and northern Europe, as there is a link between strong El Ninos and heavier than normal spring rainfall over central Europe and southern regions of the UK.
Luckily I don't have to as an excellent paper was published on Watts Up by Bob Tisdale about this a couple of months ago:
...Figure 2 is a short-term (1979 to 2008) times-series graph of the El Nino Modoki Index, using the calculation from Ashok et al. Ashok et al define a typical El Nino Modoki event as, “We call an El Nino Modoki event ‘typical’ when its amplitude of the index is equal to or greater than 0.7α, where α is the seasonal standard deviation.”
Figure 3 is a longer-term (1900 to 2008) times-series graph of the El Nino Modoki Index. As you will note, El Nino Modoki events as determined by the El Nino Modoki Index have occurred over the entire term of the data. There is nothing NEW about El Nino Modoki events.
HADISST data is available through the KNMI Climate Explorer website: