Member Profile

Rajashree Naha

PhD Student

School of Earth, Atmosphere and Environment
Monash University

rajashree.naha@monash.edu

Biography

Rajashree completed her Bachelor of Science degree in Physics from the University of Calcutta in June 2016, after which she pursued her Master's in Ocean and Atmospheric Sciences from the University of Hyderabad. Her dissertation is primarily based on the topic, "Interannual variability of the Arabian Sea warm pool and its response to El Niño and varying phases of Pacific Decadal Oscillation". She received her final degree certificate in October 2018. She is currently pursuing her Doctor of Philosophy from the School of Earth, Atmosphere and Environment, Monash University, Australia, under the supervision of Dr. Shayne McGregor, with a project thesis that aims to develop a probabilistic understanding of episodic wind event activity in the Pacific basin and the way it is modulated by background state changes.

THESIS: To develop a probabilistic understanding of episodic wind event activity in the Pacific basin and how it is modulated by background state changes in all tropical oceans.

The project concerns itself with the developing an understanding of episodic wind forcing (bursts of westerly and easterly winds) and their potential predictability. The focus of this research will be on events from both within and outside of the equatorial region, as both play a role in the triggering of these events, modulating Pacific warm water volume and perhaps even the magnitude of events. We aim to utilise the atmospheric general circulation model ACCESS (and potentially partially coupled simulations) to examine whether changes in these interbasin gradients in background SST influence/modulate the activity of wind events (zonal and meridional gradients) within the Pacific basin. In both cases, we will experiment with realistic SSTs, to better understand what time periods hosted potentially predictable episodic wind events, and idealised SSTs, to better understand the role of interbasin SST gradient changes and changes in total SST. The topic deals with both past and present climate extremes. ENSO being one of the most dominant factors regulating our climate system, we are looking forward to build a connection between ENSO in the Pacific with other oceanic systems like the Atlantic and the Indian ocean, which also features in the centre's research proposal. We expect that improving our understanding of these events will help us to predict the weather and future climate changes.