Indian Ocean Dipole drives malaria resurgence in East African highlands

Hashizume, Masahiro; Chaves, Luis Fernando; Minakawa, Noboru

doi:10.1038/srep00269


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Indian Ocean Dipole drives malaria resurgence in East African highlands

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Title:	Indian Ocean Dipole drives malaria resurgence in East African highlands
Authors:	Hashizume, Masahiro Browse this author →KAKEN DB
	Chaves, Luis Fernando Browse this author →ORCID
	Minakawa, Noboru Browse this author
Issue Date:	16-Feb-2012
Publisher:	Nature Publishing Group
Journal Title:	Scientific Reports
Volume:	2
Start Page:	269
Publisher DOI:	10.1038/srep00269
PMID:	22355781
Abstract:	Malaria resurgence in African highlands in the 1990s has raised questions about the underlying drivers of the increase in disease incidence including the role of El-Niño-Southern Oscillation (ENSO). However, climatic anomalies other than the ENSO are clearly associated with malaria outbreaks in the highlands. Here we show that the Indian Ocean Dipole (IOD), a coupled ocean-atmosphere interaction in the Indian Ocean, affected highland malaria re-emergence. Using cross-wavelet coherence analysis, we found four-year long coherent cycles between the malaria time series and the dipole mode index (DMI) in the 1990s in three highland localities. Conversely, we found a less pronounced coherence between malaria and DMI in lowland localities. The highland/lowland contrast can be explained by the effects of mesoscale systems generated by Lake Victoria on its climate basin. Our results support the need to consider IOD as a driving force in the resurgence of malaria in the East African highlands.
Rights:	http://creativecommons.org/licenses/by-nc-sa/3.0/
Type:	article
URI:	http://hdl.handle.net/2115/48543
Appears in Collections:	環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Luis Fernando CHAVES

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