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@ARTICLE{Jain:1048119,
author = {Jain, Shipra and Turkington, Thea and Tan, Wee Leng and
Schwartz, Chen and Scaife, Adam A. and Shepherd, Theodore
G.},
title = {{T}owards developing an operational {I}ndian ocean dipole
warning system for {S}outheast {A}sia},
journal = {Scientific reports},
volume = {15},
number = {1},
issn = {2045-2322},
address = {[London]},
publisher = {Springer Nature},
reportid = {FZJ-2025-04510},
pages = {14728},
year = {2025},
abstract = {Two strong positive Indian Ocean Dipole (IOD) events in
2019 and 2023 led to multiple disastersover Southeast Asia,
highlighting the need for warnings of IOD events. This paper
presents a stocktakeof the current criteria for IOD
monitoring and prediction and describes the development of
anIOD warning system for Southeast Asia. We examined how
subjective choices such as observationaldatasets, baseline
periods, and time averaging affect IOD event identification.
Our findings indicatethat the choice of sea-surface
temperature dataset and time averaging (monthly vs.
3-monthly mean)lead to marked differences in the Dipole Mode
Index (DMI), the index used for the monitoring andprediction
of IOD events, and hence between various centers on IOD
state. The southern MaritimeContinent can experience the
impact of the IOD on rainfall even when the IOD has not met
the currentoperational criterion, suggesting a need for an
impact-based threshold for the IOD. We assess the skillof
models in capturing the strength and phase of the IOD and
report errors in IOD predictions. Whilemost models are
skillful in capturing the active phase of the IOD, many
models have an overactiveIOD strength. Calibration of
DMI-based monitoring products is therefore recommended for
the mostskilful IOD predictions. Finally, we describe an
objective standard operating procedure to assist
climateforecasters in issuing timely alerts of IOD events.},
cin = {JSC},
ddc = {600},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
(SDLs) and Research Groups (POF4-511)},
pid = {G:(DE-HGF)POF4-5111},
typ = {PUB:(DE-HGF)16},
doi = {10.1038/s41598-025-99261-9},
url = {https://juser.fz-juelich.de/record/1048119},
}