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Drivers, dynamics, and persistence of the 2017/2018 Tasman Sea marine heatwave
Citation
Kajtar, JB and Bachman, SD and Holbrook, NJ and Pilo, GS, Drivers, dynamics, and persistence of the 2017/2018 Tasman Sea marine heatwave, JGR Oceans, 127, (8) Article e2022JC018931. ISSN 2169-9275 (2022) [Refereed Article]
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Copyright Statement
© 2022. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) License, (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Abstract
During the austral summer of 2017/2018, the Tasman Sea experienced an intense marine heatwave over an extensive area. It persisted for approximately 3 months and caused substantial ecological impacts. The marine heatwave was understood to have been driven primarily by increased net downward heat flux associated with a high pressure system. However, it has been unclear why the marine heatwave persisted. Using an ultra-high-resolution (∼1 km) regional ocean model simulation, the drivers, dynamics, and persistence of the 2017/2018 marine heatwave are explored in detail. It is found that a burst of warm water advection helped to initiate the event, but a shallower than usual mixed layer, coupled with near continuous net downward air-sea heat flux, caused the marine heatwave to persist. Submesoscale dynamics were found to be relatively unimportant to the marine heatwave's persistence.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | marine heatwave, Tasman Sea, ocean model, MITgcm, submesoscale |
| Research Division: | Earth Sciences |
| Research Group: | Oceanography |
| Research Field: | Physical oceanography |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Climate change models |
| UTAS Author: | Kajtar, JB (Dr Jules Kajtar) |
| UTAS Author: | Holbrook, NJ (Professor Neil Holbrook) |
| UTAS Author: | Pilo, GS (Miss Gabriela Semolini Pilo) |
| ID Code: | 152191 |
| Year Published: | 2022 |
| Deposited By: | Oceans and Cryosphere |
| Deposited On: | 2022-08-12 |
| Last Modified: | 2022-11-21 |
| Downloads: | 5 View Download Statistics |
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