DOI: 10.1002/2014GL062459
论文题名: Differentiating flavors of the Indian Ocean Dipole using dominant modes in tropical Indian Ocean rainfall
作者: Weller E. ; Cai W. ; Du Y. ; Min S.-K.
刊名: Geophysical Research Letters
ISSN: 0094-9443
EISSN: 1944-9174
出版年: 2014
卷: 41, 期: 24 起始页码: 8978
结束页码: 8986
语种: 英语
英文关键词: climate dynamics
; climate variability
; Indian Ocean Dipole
; interannual variability
Scopus关键词: Climate change
; Oceanography
; Austral winter
; Climate dynamics
; Climate variability
; Indian Ocean dipole
; Interannual variability
; Rainfall variability
; Tropical Indian ocean
; Warming climate
; Rain
; annual variation
; anomaly
; canonical analysis
; climate change
; Kelvin wave
; oscillation
; rainfall
; Indian Ocean
英文摘要: Phase locked to austral winter and spring, canonical positive Indian Ocean Dipoles (pIODs) generally peak in spring. In recent decades, there has been an increase in unseasonable pIODs which, different from canonical pIODs, peak and decay by September. Distinguishing unseasonable pIODs from canonical pIODs is important, as conditions leading to more frequent unseasonable events are projected to persist in a warming climate. Here using superimposition of the first two seasonally evolving dominant modes of tropical Indian Ocean rainfall variability, we differentiate these types of pIODs. The first mode reflects characteristics of canonical pIODs, in which anomalies intensify with seasonal evolution. However, the second mode, with cool and dry anomalies extending from the eastern pole, reverses from winter to spring, signifying the demise of unseasonable pIODs. Processes embedded in the second mode reflect timing of propagation in equatorial Kelvin waves and their relative importance to the first mode, in generating different pIODs. Key Points Seasonal evolving modes of tropical Indian Ocean rainfall anomalies are analyzedThree types of positive Indian Ocean Dipole events are differentiatedThe second S-EOF mode accounts for unseasonable pIOD seasonality and strength ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921888599&doi=10.1002%2f2014GL062459&partnerID=40&md5=f48a82b4ce48cfc1fe8f4e2cfce5a283
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6707
Appears in Collections: 气候减缓与适应
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作者单位: CSIRO Marine and Atmospheric Research, Aspendale, VIC, Australia
Recommended Citation:
Weller E.,Cai W.,Du Y.,et al. Differentiating flavors of the Indian Ocean Dipole using dominant modes in tropical Indian Ocean rainfall[J]. Geophysical Research Letters,2014-01-01,41(24).