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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 31, issue 11
Ann. Geophys., 31, 1941–1948, 2013
https://doi.org/10.5194/angeo-31-1941-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 31, 1941–1948, 2013
https://doi.org/10.5194/angeo-31-1941-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 15 Nov 2013

Regular paper | 15 Nov 2013

Regional variability of raindrop size distribution over Indonesia

M. Marzuki1,2, H. Hashiguchi2, M. K. Yamamoto2, S. Mori3, and M. D. Yamanaka3 M. Marzuki et al.
  • 1Department of Physics, Andalas University, Padang, Indonesia
  • 2Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Kyoto, Japan
  • 3Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan

Abstract. Regional variability of raindrop size distribution (DSD) along the Equator was investigated through a network of Parsivel disdrometers in Indonesia. The disdrometers were installed at Kototabang (KT; 100.32° E, 0.20° S), Pontianak (PT; 109.37° E, 0.00° S), Manado (MN; 124.92° E, 1.55° N) and Biak (BK; 136.10° E, 1.18° S). It was found that the DSD at PT has more large drops than at the other three sites. The DSDs at the four sites are influenced by both oceanic and continental systems, and majority of the data matched the maritime-like DSD that was reported in a previous study. Continental-like DSDs were somewhat dominant at PT and KT. Regional variability of DSD is closely related to the variability of topography, mesoscale convective system propagation and horizontal scale of landmass. Different DSDs at different sites led to different ZR relationships in which the radar reflectivity at PT was much larger than at other sites, at the same rainfall rate.

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