Objective Regionalisation of Tamil Nadu, a Southern State of India based on Principal Component Analysis

  • R. Asokan Regional Meteorological Centre, Chennai
  • N. Sivagnanam (Retd.), Department of Geography University of Madras, Chennai
Keywords: Principal component analysis, sub-regions, northeast monsoon, climate variables.

Abstract

The daily rainfall of 29 districts of Tamil Nadu during northeast monsoon is used for principal component analysis. Out of 29 districts, 22 districts are grouped into five homogenous Sub-regions which are having stronger relationship with five Varimax rotated principal components and the 7 districts are found with weak / moderate relations to any of the Principal components. Tamil Nadu is regionalised in to five Sub-regions based on strong relationship with first 5 PCs; Subregion 1 comprises of districts Cuddalore, Perambalur, Pudukottai, Thanjavur, Thiruvarur and Nagapattinam. The Interior districts Madurai, Sivaganga, Virudhunagar and Dindugul make subregion II. The districts Dharmapuri, Salem, Namakkal, Karur, Erode, Nilgiris and Coimbatore make Sub-region III and the districts Chennai, Kanchipuram, Vellore and Thiruvallur form Subregion IV. The group of districts Tirunelveli, Thoothukudi and Kanyakumari make Sub-region V
Published
2024-02-26
How to Cite
Asokan, R., & Sivagnanam, N. (2024). Objective Regionalisation of Tamil Nadu, a Southern State of India based on Principal Component Analysis. Vayumandal, 40(1-2), 113-122. Retrieved from https://vayumandal.imetsociety.org/index.php/Vayumandal/article/view/159
Issue
Vol 40 No 1-2 (2014): VAYUMANDAL
Section
Research Paper

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