The data highlighted in red are for the official El Niño months of the 1997/98 El Niño from NOAA's Oceanic
NINO Index.
-- Anthony Comments on NOAA's Recent Changes to the Oceanic
NINO Index (ONI) Guest post by Bob Tisdale As many of you are aware, I'm writing another book.
When I point out that there is no significant change in any of
the NINO indices, the response is «well it hasn't happened yet».
As with
the NINO indices, POAMA forecasts of the IOD are given out to nine months.
The second line under ENSO shows
NINO indices based on HADISST data.
Let's look at the curves created by subtracting the different
NINO indices (NINO1 +2, NINO3, NINO3.4 & NINO4) from the PDO available through JISAO.
The differences between the ERSST.v3b version of the PDO data and the various ERSST.v3b
NINO Indices create curves that in no way resemble the JISAO / HADISST versions.
Not exact matches
But the actual PDO
index isn't increasing, it just fluctuates or oscillates like el
nino, forming an overall flat line longer term.
In that paper, we worked with the original
indices — the common
indices including AMO, NAO, PDO,
NINO and a few others.
A multiproxy - based reconstruction of the boreal cold - season (Oct - Mar)
NINO 3 (SST anomalies in the tropical Pacific from 5 ° N to 5 ° S, 150 ° W to 90 ° W)
index (Mann et al., 2000b) has also been made.