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. 2022 Jan 27;13:533. doi: 10.1038/s41467-022-28145-7

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — A–C The cross-coherence wavelet spectrum between humidity and monthly malaria cases in Ahmedabad (A) and Surat (C). Cross-coherence varies between 0 and 1 in a color scale from blue to red with the lines indicating 5% significance levels. Only regions within these lines exhibit significant cross-coherence at those levels. The shaded region corresponds to periods and times that are affected by the boundaries and are outside the so-called cone of significance. (The RH time series have been previously filtered with a low-pass filter to remove seasonality and therefore periods below 1 year, and to therefore focus on interannual variability, Fig. S16). B–D The total cases during the transmission season from August to November are shown as a function of average RH in a critical window preceding this season from May to July for Ahmedabad (B) and March to July for Surat (D). (The corresponding Pearson correlation values are R = 0.72 and 0.69).