| DOI: | 10.1002/grl.50632
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| 论文题名: | Distinct manifestations of austral summer tropical intraseasonal oscillations |
| 作者: | Hirata F.E.; Webster P.J.; Toma V.E.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8857
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| EISSN: | 1944-8588
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| 出版年: | 2013
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| 卷: | 40, 期:12 | | 起始页码: | 3337
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| 结束页码: | 3341
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| 语种: | 英语
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| 英文关键词: | Intraseasonal variability
; Madden-Julian oscillation
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| Scopus关键词: | Atmosphere-ocean interactions
; Intraseasonal oscillations
; Intraseasonal variability
; Madden-Julian oscillation
; Propagation characteristics
; Sea surface temperature anomalies
; Tropical intraseasonal oscillation
; Tropical intraseasonal variability
; Atmospheric radiation
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Coastal zones
; Life cycle
; Tropical engineering
; air-sea interaction
; atmospheric convection
; Madden-Julian oscillation
; radiative forcing
; sea surface temperature
; seasonal variation
; summer
; temperature anomaly
; Indonesia
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| 英文摘要: | Event-to-event intraseasonal convection is found to be significantly different from a canonical Madden-Julian oscillation (MJO). Nearly half of all austral summer events do not show the same initiation or propagation characteristics of canonical MJOs, although they meet some MJO criteria during their life cycles. Variations of intraseasonal convection fall within three distinct forms: the canonical MJO, an eastward decaying mode, and an eastward intensifying mode. This distinction offers important insights into the overall dynamics and predictability of tropical intraseasonal variability. Sea surface temperature anomalies generated during convective breaks are fundamental for canonical propagation and result from radiative forcing whose modulation is a consequence of large-scale wave dynamics. Eastward propagation seems to rely more on the state of the tropical atmosphere-ocean system before convective triggering than on the trigger itself. Eastward decaying events exhibit weaker wave-related anomalies. Alternatively, mechanisms driving intensification over Indonesia are very different from the first two categories. Key Points Intraseasonal oscillations present distinct modes other than the MJO Atmosphere-ocean interaction is vital to determine the evolution of convection SST anomalies result from radiative forcing modulated by large-scale waves ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880529350&doi=10.1002%2fgrl.50632&partnerID=40&md5=b86a0bd037fab82024019b6a42596241
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| Citation statistics: |
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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/6121
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| Appears in Collections: | 气候减缓与适应
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作者单位: | School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA 30332, United States
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| Recommended Citation: | |
Hirata F.E.,Webster P.J.,Toma V.E.. Distinct manifestations of austral summer tropical intraseasonal oscillations[J]. Geophysical Research Letters,2013-01-01,40(12).
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