Anthropogenic climate change has been most clearly observed in the world's midlatitude regions. The limited number of observations for the Southern Hemisphere has prevented the development of a long-term understanding of these changes. This project aims to fill this critical gap by examining daily changes in Southern Hemisphere atmospheric circulation back to 1830. To do this, the project will build on recently recovered daily instrumental weather observations for southern Australia.
Tag Archive: climate variability
New study finds ocean heat asymmetry between hemispheres can be explained by natural variability in the climate system superimposed on long-term ocean warming.
Bella Blanche writes about spending time on the vast Macfarlane Station in Tambo, Queensland and introduces a methodology to assess risks posed by climate change, and the vulnerability of the native rangeland resources located west of the Great Dividing Range.
Forecasting El Niño Southern Oscillation (ENSO) events, and anticipating how they may change with global warming remains a significant challenge for climate researchers. An ENSO complexity workshop held in November 2017 produced a follow-up paper summarising what we know about ENSO and its predictability.
The Central American mid‐summer drought (MSD) is the decline in rainfall during the middle of the wet season over Central America, which has been shown to have strong effects on agriculture and bushfires in Costa Rica. The Madden–Julian oscillation (MJO) has been shown to influence Costa Rican rainfall on intra‐seasonal time scales, and therefore may be important to the MSD. This research aims to find the connection between the MJO and MSD.
Satellites measure surface winds relative to the moving ocean surface, while ocean moorings measure absolute winds at that location. This project will make use of both measuring methods to better understand the role of surface currents in these differences and whether they can be reconciled.
The past four months since out last newsletter has been tightly packed with the official launch of CLEX, the legacy event for ARCCSS and an acceleration in important research across all of our programs.
Steefan Contractor attended the ARCCSS/CLEX winter school from June 25-29, 2018. The theme of the school was climate extremes. It involved lectures in the morning on various climate extremes (such as heatwaves and rainfall extremes) and also a group activity in the afternoons.
It is hoped this proposed synthesis of two ENSO structures, their interaction with each other and how they respond to external forcing, will be the catalyst for future research and practical applications for forecasting and determining the impacts of present and future ENSO events.
This study highlights the importance of simulating global and regional warming responses correctly, to enable more accurate estimates of how the occurrence probability of climate extremes may change in a warming climate.