{
  "annotation_id": "4c973f83-27d7-4587-b627-571dfa4f6f5b",
  "date_created": "2026-03-02T18:00:53.833000Z",
  "date_modified": "2026-03-02T18:00:53.833000Z",
  "file_hash": "b76ea144f6797f91e6e45e44a5d6bacd015bc45c50a6db2feee9dd9378f13b4c",
  "private": false,
  "record": {
    "abstract": "Using the Morlet continuous wavelet transform on data over the period\n1871-1990, it is found that the global wavelet cross spectra between two solar\nactivity indices and seven major Indian monsoon rainfall time series show\nsignificant power around the period of the 11 year solar cycle, passing the\n$\\chi^2$ test of significance proposed by Torrence and Compo (1998) at levels\nexceeding 95% in 10 out of the 14 cases studied. Furthermore two distinct\nepochs are found in the computed cross-spectrum, the transition between them\noccurring around the decade 1915-1925, beyond which solar activity parameters\nshow a significant increase. By comparison between selected periods of three\ncycles in solar activity in each of the two epochs, it is shown that the\naverage rainfall is higher in all seven rainfall indices during periods of\ngreater solar activity, at {\\it z}-test confidence levels of 95% or greater in\nthree of them.",
    "arxiv_id": "physics/0411115",
    "authors": [
      "S. Bhattacharyya",
      "R. Narasimha"
    ],
    "categories": [
      "physics.geo-ph",
      "physics.ao-ph"
    ],
    "title": "Indian monsoon rainfall is higher in epochs of higher solar activity: a   wavelet cross-spectral analysis",
    "url": "https://arxiv.org/abs/physics/0411115"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f04c39dd-017b-419e-87e8-b982bfda1ddf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}