Member Profile

Josué Martínez Moreno

PhD Student


Australian National University

josue.martinezmoreno@anu.edu.au

Biography

Josué Martinez Moreno is a Mexican earth scientist interested in oceanic climate and environmental issues, particularly where there is a high impact in population. In 2017, He started his PhD candidature at the Australian National University focusing on the effects of climate change over oceanic processes (eddies and jets) through perturbations of kinetic energy. This research is relevant due to a possible intensification of coastal heatwaves, changes in the distribution of oceanic primary productivity and feedbacks to the earth climate. He completed his bachelor degree at the Center for Atmospheric Sciences at the National Autonomous University of Mexico in 2017. His honours project studied the passive particle dispersion of the Coatzacoalcos River in the Gulf of Mexico using the MITgcm model.

THESIS: How has climate change affected ocean eddies and jets?

Oceanic processes with spatial scales of 10 to 100 km and temporal scales of days to years are known as mesoscale processes and include eddies, jets and waves. These processes play important roles in energy transfer, biologic dynamics and heat, momentum and tracers transport (Lévy et al., 2012; Thomas et al., 2008). Mesoscale processes usually are diagnosed by kinetic energy, which commonly is decomposed as the mean kinetic energy (MKE) and eddy kinetic energy (EKE) (Kang and Curchitser, 2017; Wyrtki et al., 1976). This decomposition provides the mean background and the time-variation of kinetic energy, but do not differentiate between mesoscale and non-mesoscale processes, which are present in both mean and transient fields. This lack of a process-based definition of EKE makes it difficult to understand each process in the oceanic transient adjustment to climate change. Thus, the contribution of eddies and jets in the oceanic energy budget remains unknown. The present study will explore the energy contained by eddies and jets to understand them on a global scale over the past decades.