August 18, 2021 12:06 pm
Published by Jenny Rislund
In Melbourne, 50% of rainfall and 75% of extreme daily rainfall occurs on days with at least one linearly organized convective system. However, thunderstorms are often localized events, and much of the rainfall in a region falls over a short period of time. Furthermore, not all thunderstorms necessarily occur in lines, and organized storms that lead to extreme sub-daily rainfall may be different from those that lead to extreme daily rainfall. This projects aims to identify and categorize organizational structures linked with the most intense rainfalls in the region.
August 18, 2021 11:48 am
Published by Jenny Rislund
In 1891, Melbourne experienced one of its worst floods on record leading to extensive damage and many deaths. But what was this wayward weather system? How often do lows from our east coast drift westward, and what are their impacts in Victoria? How many of our most significant flooding events are associated with a pattern like this? And are these systems changing over time?
August 18, 2021 11:39 am
Published by Jenny Rislund
In this project you will be addressing the challenge of recurring droughts by helping us build a collection of data visualisations to tell the story of Victoria’s parched history. Your collection will help us understand these droughts were experienced by people across the state, and how our understanding of drought is changing as we move into a warmer world.
August 18, 2021 11:27 am
Published by Jenny Rislund
The jet stream is a band of strong westerly winds in the upper atmosphere. Shifts in the jet are associated with shifts in the storm tracks, with associated changes in regional weather and rainfall. This project will look at methods to characterise the position and strength of the jet stream in the Southern Hemisphere, with a focus on changes in the Australian region with time.
August 18, 2021 11:26 am
Published by Jenny Rislund
Ozone depletion over Antarctica from the late 1970s to 2000 has been linked to changes in the surface climate over the Southern Hemisphere in summer, among them a more positive Southern Annular Mode (SAM). Over Australian latitudes, a more positive SAM is associated with increased rainfall over eastern Australia in the summer season. Given stratospheric ozone over Antarctica is projected to recover to 1980 levels by ~2050, the impact of ozone recovery on its own would be to reduce this upward trend in summertime rainfall over eastern Australia.
August 18, 2021 9:29 am
Published by Jenny Rislund
Dimethyl sulfide (DMS) is a biogenic source of sulfate aerosol that influences the climate system by reducing solar radiation and altering cloud properties. Recent observations suggest that DMS may play a dominant role in the aerosol and cloud formation along the Antarctic coast where DMS is produced by marine microbes that reside on top, in, and under sea ice. However, the role of DMS remains unclear especially over the regional scale, partly due to the lack of compilation of DMS data.
August 18, 2021 9:16 am
Published by Jenny Rislund
Compound events (CEs) caused by a combination of multiple drivers often result in more severe socio-economic and ecological impacts than conventional events. One example for CEs with the potential to cause considerable negative impacts on crop yields and human health is the cooccurrence of hot and dry conditions. The student will work with climate model output from Earth System Models participating in the sixth round of the CMIP6 and assess what impact a gradual increase followed by a decrease in atmospheric carbon dioxide has on the occurrence frequency of hot and dry CEs.
August 18, 2021 9:15 am
Published by Jenny Rislund
Due to the lack of appropriate historical datasets, quantification of shifts in global extreme precipitation intensity has not been possible so far. This project will use a recently developed long-term global dataset of daily precipitation alongside a dataset of global temperature changes to calculate the CC scaling for broad climatic regions across the globe.
August 18, 2021 9:14 am
Published by Jenny Rislund
Recent research has shown that mean (raining) and extreme (pouring) changes can align in some regions. This project will use a recently developed long-term global dataset of daily precipitation to answer why, how and where changes in mean frequency and intensity align with changes in extreme frequency and intensity of precipitation.
August 18, 2021 9:13 am
Published by Jenny Rislund
This project aims to quantify the disproportionate exposure to urban heat intensity across major Australian cities. Urban heat stress poses a major risk to the health and wellbeing of urban dwellers. Case studies of individual cities suggest that environmental stressors such as urban heat may be unequally distributed across income groups.
