| DOI: | 10.1175/JCLI-D-16-0516.1
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| Scopus记录号: | 2-s2.0-85015870323
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| 论文题名: | The influence of the Indian Ocean on ENSO stability and flavor |
| 作者: | Wieners C.E.; Dijkstra H.A.; de Ruijter W.P.M.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2017
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| 卷: | 30, 期:7 | | 起始页码: | 2601
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| 结束页码: | 2620
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| 语种: | 英语
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| Scopus关键词: | Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Nickel
; Sensitivity analysis
; Stream flow
; Surface waters
; Tropics
; Atmosphere-ocean interactions
; ENSO
; Indian ocean
; Interannual variability
; Pacific ocean
; Oceanography
; air-sea interaction
; annual variation
; complexity
; El Nino
; El Nino-Southern Oscillation
; La Nina
; sea surface temperature
; thermocline
; tropical meteorology
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (West)
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| 英文摘要: | The effect of long-term trends and interannual, ENSO-driven variability in the Indian Ocean (IO) on the stability and spatial pattern of ENSO is investigated with an intermediate-complexity two-basin model. The Pacific basin is modeled using a fully coupled (i.e., generating its own background state) Zebiak-Cane model. IO sea surface temperature (SST) is represented by a basinwide warming pattern whose strength is constant or varies at a prescribed lag to ENSO. Both basins are coupled through an atmosphere transferring information between them. For the covarying IO SST, a warm IO during the peak of El Niño (La Niña) dampens (destabilizes) ENSO, and a warm IO during the transition from El Niño to La Niña (La Niña to El Niño) shortens (lengthens) the period. The influence of the IO on the spatial pattern of ENSO is small. For constant IO warming, the ENSO cycle is destabilized because stronger easterlies induce more background upwelling, more thermocline steepening, and a stronger Bjerknes feedback. The SST signal at the east coast weakens or reverses sign with respect to the main ENSO signal [i.e., ENSO resembles central Pacific (CP) El Niños]. This is due to a reduced sensitivity of the SST to thermocline variations in case of a shallow background thermocline, as found near the east coast for a warm IO. With these results, the recent increase in CP El Niño can possibly be explained by the substantial IO (and west Pacific) warming over the last decades. © 2017 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49808
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Institute for Marine and Atmospheric Research Utrecht, Department of Physics and Astronomy, Utrecht University, Utrecht, Netherlands
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| Recommended Citation: | |
Wieners C.E.,Dijkstra H.A.,de Ruijter W.P.M.. The influence of the Indian Ocean on ENSO stability and flavor[J]. Journal of Climate,2017-01-01,30(7)
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