ACP - Atlantic Multidecadal Oscillation modulates the relationship

Abstract. The El Niño–Southern Oscillation (ENSO) is a crucial driver of fire weather in Australia, with the correlation between ENSO and Australian fire weather having intensified over the past 2 decades. However, the underlying causes for this change have not been thoroughly investigated. In this study, we utilize reanalysis datasets and numerical model simulations to demonstrate that the Atlantic Multidecadal Oscillation (AMO) could potentially modulate the ENSO–Australian fire weather relationship. The correlation between ENSO and the Australian Fire Weather Index (FWI) increases from 0.17 to 0.70 as the AMO transitions from its negative to positive phase. This strengthening effect can be attributed to atmospheric teleconnection mechanisms. Specifically, the positive AMO phase, characterized by warming in the northern and tropical Atlantic, generates Rossby wave trains, leading to high-pressure systems over Australia. Consequently, local temperature and wind speed increase, while precipitation decreases. This signal, superimposed on ENSO, serves to amplify the ENSO effect on Australian fire weather.

ACP - Relations - Atlantic Multidecadal Oscillation modulates the relationship between El Niño–Southern Oscillation and fire weather in Australia

Atlantic Multidecadal Oscillation Modulates ENSO Atmospheric Anomaly Amplitude in the Tropical Pacific in: Journal of Climate Volume 35 Issue 12 (2022)

ACP - Relations - Atlantic Multidecadal Oscillation modulates the relationship between El Niño–Southern Oscillation and fire weather in Australia

ACP - Relations - Atlantic Multidecadal Oscillation modulates the relationship between El Niño–Southern Oscillation and fire weather in Australia

ACP - Relations - Atlantic Multidecadal Oscillation modulates the relationship between El Niño–Southern Oscillation and fire weather in Australia

Modulation of Atlantic Multidecadal Oscillation on ENSO-East Asian early summer monsoon connection: role of a tropical pathway

Frontiers Atlantic Multidecadal Oscillation Modulates the Relation of ENSO With the Precipitation in the Central-Western Indian Ocean

Physical Mechanism of Winter Temperature Multidecadal Variations in Arid Central Asia: The Role of the Atlantic Multidecadal Oscillation (AMO) in: Journal of Climate Volume 36 Issue 21 (2023)

Frontiers Atlantic Multidecadal Oscillation Modulates the Relation of ENSO With the Precipitation in the Central-Western Indian Ocean

The influence of the Atlantic multidecadal oscillation on the eastern Andes low-level jet and precipitation in South America

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Asymmetrical Modulation of the Relationship Between the Western Pacific Pattern and El Niño–Southern Oscillation by the Atlantic Multidecadal Oscillation in the Boreal Winter - Aru - 2023 - Geophysical Research Letters - Wiley Online Library