Idioma:

An Asymmetry in the IOD and ENSO Teleconnection Pathway and Its Impact on Australian Climate

Cai, Wenju ; Van Rensch, Peter ; Cowan, Tim ; Hendon, Harry H.

Journal of climate, 2012-09, Vol.25 (18), p.6318-6329 [Periódico revisado por pares]

Boston, MA: American Meteorological Society

Texto completo disponível

Citações Citado por

Enviar para

Título:
An Asymmetry in the IOD and ENSO Teleconnection Pathway and Its Impact on Australian Climate
Autor: Cai, Wenju ; Van Rensch, Peter ; Cowan, Tim ; Hendon, Harry H.
Assuntos: Anomalies ; Asymmetry ; Climate ; Climate change ; Convection ; Damping ; Dipoles ; Earth, ocean, space ; El Nino ; El Nino phenomena ; El Nino-Southern Oscillation event ; Exact sciences and technology ; External geophysics ; La Nina ; Marine ; Oceanic analysis ; Oceanic climates ; Oceans ; Planetary waves ; Precipitation ; R&D ; Radiation ; Rain ; Rainfall ; Reduction ; Research & development ; Sea surface ; Sea surface temperature ; Sea surface temperature anomalies ; Skewed distribution ; Skewness ; Southern Oscillation ; Spring (season) ; Studies ; Surface temperature ; Tropical climates ; Tropical regions ; Wave packets ; Wave trains
É parte de: Journal of climate, 2012-09, Vol.25 (18), p.6318-6329
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Recent research has shown that the climatic impact from El Niño–Southern Oscillation (ENSO) on middle latitudes west of the western Pacific (e.g., southeast Australia) during austral spring (September–November) is conducted via the tropical Indian Ocean (TIO). However, it is not clear whether this impact pathway is symmetric about the positive and negative phases of ENSO and the Indian Ocean dipole (IOD). It is shown that a strong asymmetry does exist. For ENSO, only the impact from El Niño is conducted through the TIO pathway; the impact from La Niña is delivered through the Pacific–South America pattern. For the IOD, a greater convection anomaly and wave train response occurs during positive IOD (pIOD) events than during negative IOD (nIOD) events. This “impact asymmetry” is consistent with the positive skewness of the IOD, principally due to a negative skewness of sea surface temperature (SST) anomalies in the east IOD (IODE) pole. In the IODE region, convection anomalies are more sensitive to a per unit change of cold SST anomalies than to the same unit change of warm SST anomalies. This study shows that the IOD skewness occurs despite the greater damping, rather than due to a breakdown of this damping as suggested by previous studies. This IOD impact asymmetry provides an explanation for much of the reduction in spring rainfall over southeast Australia during the 2000s. Key to this rainfall reduction is the increased occurrences of pIOD events, more so than the lack of nIOD events.
Editor: Boston, MA: American Meteorological Society
Idioma: Inglês

Links

View record in Pascal Francis

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

An Asymmetry in the IOD and ENSO Teleconnection Pathway and Its Impact on Australian Climate

Cai, Wenju ; Van Rensch, Peter ; Cowan, Tim ; Hendon, Harry H.

Boston, MA: American Meteorological Society

Buscando em bases de dados remotas. Favor aguardar.