JISAO data

Figures and text


0. The text as a .doc file.

I. Things you asked for

I think that you mistyped, but these are the regressions of annual mean SST onto the Indian Ocean Index (15N-15S,53-83E) and the CTI. The "PNG" versions are easier to view on a monitor.
SST correlation with the IOI: PNG PS
SST correlation with the CTI: PNG PS

I think that this is what you meant: regressions of annual mean SLP onto the IOI.

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II. The paper figures and text


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III. What's different between Hurrell/Hoerling and what we're doing.

They use at least two different time series in two of there papers. We are using 54-84E as our longitudes and in the second Climate Dynamics review paper, they are using the entire Indian Ocean (40-110E). Their time series looks much more like Darwin (a jump in the late 1970s) whereas ours has a jump at around 1960.

Hurrell/Hoerling analyze JFM 1950-99. They cite Sutton and Hodson who analyze 1871-1999 GCM output and get less of a sense that the Indonesian SST is the primary forcing of the NAO. Below are correlation maps of NDJFMA NAM and SST for 1900-49 and 1950-99.


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If you look at earlier periods for the JFM season, the warm spot near Indonesia moves around and a warming of the general Indian Ocean isn't present in the 1900-49 epoch.


January 2005
Todd Mitchell ( mitchell@atmos.washington.edu )
JISAO data publications