Abstract
Some fairly regular and nearly annual variability in the equatorial Pacific after the major 1997/98 El Niño event is studied. Sea level, sea surface temperature (SST), and surface wind anomalies of this variability are tied together in a way similar to the slow cycles of El Niño-Southern Oscillations (ENSO). Despite a slightly longer-than-annual time scale, similar variability was also found in the datasets prior to 1997/98. This fast-coupled mode is superimposed on the slow 3-5-yr ENSO cycles in the tropical Pacific. It contributed to the occurrences of some minor El Niño and La Niña events. Zonal currents associated with the equatorial waves play a dominating role in generating SST anomalies of this fast mode through anomalous zonal advection. It is suggested that this fast mode may be best understood as a coupled Pacific Ocean basin (POB) mode. The existence of this fast mode, which appears independent of the slow ENSO mode, has important implications in understanding and predicting the tropical Pacific SST anomaly.
| Original language | English |
|---|---|
| Pages (from-to) | 2478-2488 |
| Number of pages | 11 |
| Journal | Journal of Climate |
| Volume | 17 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2004 Jun 15 |
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All Science Journal Classification (ASJC) codes
- Atmospheric Science
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A near-annual Pacific Ocean basin mode. / Kang, In Sik; Kug, Jong Seong; An, Soon Il; Jin, Fei Fei.
In: Journal of Climate, Vol. 17, No. 12, 15.06.2004, p. 2478-2488.Research output: Contribution to journal › Article
TY - JOUR
T1 - A near-annual Pacific Ocean basin mode
AU - Kang, In Sik
AU - Kug, Jong Seong
AU - An, Soon Il
AU - Jin, Fei Fei
PY - 2004/6/15
Y1 - 2004/6/15
N2 - Some fairly regular and nearly annual variability in the equatorial Pacific after the major 1997/98 El Niño event is studied. Sea level, sea surface temperature (SST), and surface wind anomalies of this variability are tied together in a way similar to the slow cycles of El Niño-Southern Oscillations (ENSO). Despite a slightly longer-than-annual time scale, similar variability was also found in the datasets prior to 1997/98. This fast-coupled mode is superimposed on the slow 3-5-yr ENSO cycles in the tropical Pacific. It contributed to the occurrences of some minor El Niño and La Niña events. Zonal currents associated with the equatorial waves play a dominating role in generating SST anomalies of this fast mode through anomalous zonal advection. It is suggested that this fast mode may be best understood as a coupled Pacific Ocean basin (POB) mode. The existence of this fast mode, which appears independent of the slow ENSO mode, has important implications in understanding and predicting the tropical Pacific SST anomaly.
AB - Some fairly regular and nearly annual variability in the equatorial Pacific after the major 1997/98 El Niño event is studied. Sea level, sea surface temperature (SST), and surface wind anomalies of this variability are tied together in a way similar to the slow cycles of El Niño-Southern Oscillations (ENSO). Despite a slightly longer-than-annual time scale, similar variability was also found in the datasets prior to 1997/98. This fast-coupled mode is superimposed on the slow 3-5-yr ENSO cycles in the tropical Pacific. It contributed to the occurrences of some minor El Niño and La Niña events. Zonal currents associated with the equatorial waves play a dominating role in generating SST anomalies of this fast mode through anomalous zonal advection. It is suggested that this fast mode may be best understood as a coupled Pacific Ocean basin (POB) mode. The existence of this fast mode, which appears independent of the slow ENSO mode, has important implications in understanding and predicting the tropical Pacific SST anomaly.
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U2 - 10.1175/1520-0442(2004)017<2478:ANPOBM>2.0.CO;2
DO - 10.1175/1520-0442(2004)017<2478:ANPOBM>2.0.CO;2
M3 - Article
AN - SCOPUS:3242740336
VL - 17
SP - 2478
EP - 2488
JO - Journal of Climate
JF - Journal of Climate
SN - 0894-8755
IS - 12
ER -