(1) During October 2006, positive SST anomalies above 0.5ºC covered the equatorial Pacific Ocean east to160ºE. The index of NINO Z was 1.1ºC.
(2) Compared with last month, abnormal warm subsurface water persisted in the most equatorial Pacific but its intensity weakened obviously.
(3) Southern Oscillation Index (SOI) was –1.3.
(4) Westerly anomalies covered most of the equatorial Pacific Ocean.
(5) The anomalous outgoing longwave radiation (OLR) showed that convections were suppressed over Indonesia and enhanced over the equatorial western Pacific.
(6) Most of models predicted that SSTs would be abnormally above normal during following 3-6 months.
In conclusion, tropical oceanic and atmospheric conditions showed obvious features of ENSO warm phase which has been maintained for 3 months and these features are expected to persist in the following 2~3 months.
