Influence of Global-Scale Variability on the Subtropical Ridge over Southeast Australia

  title={Influence of Global-Scale Variability on the Subtropical Ridge over Southeast Australia},
  author={Wenju Cai and Peter van Rensch and Tim Cowan},
  journal={Journal of Climate},
AbstractIn recent decades, southeast Australia (SEA) has experienced a severe rainfall decline, with a maximum reduction in the austral autumn season. The cause(s) of this decline remain unclear. This study examines the interaction between remote large-scale climate modes and an atmospheric phenomenon known as the subtropical ridge (STR) at the local scale. A focus is placed on the utility of using the STR as a bridge for understanding how these remote climate drivers influence SEA rainfall… Expand
Southeast Australia Autumn Rainfall Reduction: A Climate-Change-Induced Poleward Shift of Ocean–Atmosphere Circulation
AbstractSince the 1950s annual rainfall over southeastern Australia (SEA) has decreased considerably with a maximum decline in the austral autumn season (March–May), particularly from 1980 onward.Expand
The subtropical ridge in CMIP5 models, and implications for projections of rainfall in southeast Australia
The subtropical ridge (STR) is the mean pressure ridge in the mid-latitudes, and is one of the key features affecting climate variability and change in southeast Australia. Changes to the STR andExpand
Links between Central West Western Australian Rainfall Variability and Large-Scale Climate Drivers
AbstractOver the past century, and especially after the 1970s, rainfall observations show an increase (decrease) of the wet summer (winter) season rainfall over northwest (southwest) WesternExpand
Relationships between Southeast Australian Temperature Anomalies and Large-Scale Climate Drivers
AbstractOver the past century, particularly after the 1960s, observations of mean maximum temperatures reveal an increasing trend over the southeastern quadrant of the Australian continent.Expand
The Association of Tropical and Extratropical Climate Modes to Atmospheric Blocking across Southeastern Australia
AbstractRelationships of the Indian Ocean dipole (IOD), El Nino–Southern Oscillation (ENSO), and the southern annular mode (SAM) with atmospheric blocking are investigated using a linear frameworkExpand
The Influence of the Subtropical High-Pressure Ridge on the Western Australian Wave Climate
ABSTRACT Wandres, M., Pattiaratchi, C., Wijeratne, E.M.S., Hetzel, Y., 2016. The influence of the subtropical high-pressure ridge on the Western Australian wave climate. In: Vila-Concejo, A.; Bruce,Expand
Large-Scale Influences on the Evolution of Winter Subtropical Maritime Cyclones Affecting Australia's East Coast
AbstractSubtropical maritime low pressure systems frequently impact Australia’s eastern seaboard. Closed circulation lows in the Tasman Sea region are termed East Coast Cyclones (ECC); they canExpand
Linear and nonlinear statistical analysis of the impact of sub‐tropical ridge intensity and position on south‐east Australian rainfall
The intensity and position of the sub-tropical ridge (STR) have strong relationships with rainfall variability in southern Australia. The combined effect of intensity and position in March-April-MayExpand
The response of the southwest Western Australian wave climate to Indian Ocean climate variability
Knowledge of regional wave climates is critical for coastal planning, management, and protection. In order to develop a regional wave climate, it is important to understand the atmospheric systemsExpand
Cross-continent comparison of high-resolution Holocene climate records from southern Australia — Deciphering the impacts of far-field teleconnections
Abstract Several well-dated and high-resolution, multi-proxy Holocene palaeoclimatic records have recently emerged that permit a cross-continent comparison of climatic changes in Australia. ThisExpand


Dynamics of late autumn rainfall reduction over southeastern Australia
[1] During 1950–2006, austral autumn rainfall over the south-eastern Australian state of Victoria decreased by about 40% from its long-term seasonal average. The dynamics of this decline are notExpand
An assessment of relationships between the Australian subtropical ridge, rainfall variability, and high‐latitude circulation patterns
The monthly anomaly of the latitude of the subtropical ridge over eastern Australia (L) is a major regulator of synoptic-scale influences on Australia’s climate. Three datasets have been used toExpand
Southern Australian rainfall and the subtropical ridge: Variations, interrelationships, and trends
[1] Monthly values of the latitude and intensity (mean maximum pressure) of the subtropical ridge (STR), averaged across Australian longitudes (105–155°E), have been related to variations and trendsExpand
A review of recent climate variability and climate change in southeastern Australia
Southeastern Australia (SEA) has suffered from 10 years of low rainfall from 1997 to 2006. A protracted dry spell of this severity has been recorded once before during the 20th century, but currentExpand
Associations between rainfall variability in the southwest and southeast of Australia and their evolution through time
Significant rainfall declines have been observed across much of southern Australia over the last 50 years. In particular, strong declines occurred in the southwest of Western Australia (SWWA) fromExpand
Evidence of impacts from rising temperature on inflows to the Murray‐Darling Basin
[1] The 2001–2007 Australian drought was the hottest on record with inflows to Australia's longest river system, the Murray-Darling, reaching an historical low. Here we examine the relativeExpand
Indian and Pacific Ocean Influences on Southeast Australian Drought and Soil Moisture
AbstractThe relative influences of Indian and Pacific Ocean modes of variability on Australian rainfall and soil moisture are investigated for seasonal, interannual, and decadal time scales. For theExpand
An analysis of late twentieth century trends in Australian rainfall
Trends in Australian precipitation from 1970 to 2006 are examined using a daily rainfall dataset. Results suggest a linkage between changes in the monsoon trough and rainfall trends over northwesternExpand
Teleconnection Pathways of ENSO and the IOD and the Mechanisms for Impacts on Australian Rainfall
AbstractImpacts of El Nino–Southern Oscillation (ENSO) and the Indian Ocean dipole (IOD) on Australian rainfall are diagnosed from the perspective of tropical and extratropical teleconnectionsExpand
Structure and Mechanisms of South Indian Ocean Climate Variability
A unique open-ocean upwelling exists in the tropical South Indian Ocean (SIO), a result of the negative wind curl between the southeasterly trades and equatorial westerlies, raising the thermoclineExpand