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.

Impacts of Atlantic multidecadal variability on the tropical Pacific: a multi-model study

Atlantic Multi-decadal Oscillation (AMO) and Atlantic Multidecadal Variability (AMV)

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

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

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

Impacts of the Atlantic Multidecadal Oscillation on the Relationship of the Spring Arctic Oscillation and the Following East Asian Summer Monsoon in: Journal of Climate Volume 33 Issue 15 (2020)

Atlantic Multidecadal Oscillation - an overview

Impacts of the Atlantic Multidecadal Oscillation on the Relationship of the Spring Arctic Oscillation and the Following East Asian Summer Monsoon in: Journal of Climate Volume 33 Issue 15 (2020)

Frontiers Uncertainty in Atlantic Multidecadal Oscillation derived from different observed datasets and their possible causes

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

Atmosphere, Free Full-Text

Effects of Atlantic multidecadal oscillation and Pacific decadal oscillation on interdecadal variability of fog frequency in autumn–winter season in Southwest China - Liu - 2022 - International Journal of Climatology - Wiley Online Library

Impacts of the Atlantic Multidecadal Oscillation on the Relationship of the Spring Arctic Oscillation and the Following East Asian Summer Monsoon in: Journal of Climate Volume 33 Issue 15 (2020)

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