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Arabian Journal of Geosciences

, Volume 6, Issue 2, pp 543–548 | Cite as

Influence of Icelandic Low pressure on winter precipitation variability over northern part of Indo-Pak Region

  • Muhammad Jawed IqbalEmail author
  • Kashif Ilyas
Original Paper

Abstract

Several studies demonstrate that North Atlantic Oscillation (NAO) has dominant influence on the variability of climate over Southwest Asia. We deconstruct the NAO into its two components, the Azores High and the Icelandic Low. Regional circulations are influenced by changes not only in the pressure but also the positions of the Azores High and the Icelandic Low. The results presented in this paper exhibit that significantly great portions of interannual variance of winter precipitation over Indo-Pak Region (consists of Northeast Pakistan and Northwest India) can be explained by including the contributions of the Icelandic Low pressure in addition to ENSO and AO. This contribution also explains the physical mechanisms to establish the relationships between the COA and regional climate by examining composite maps of large-scale circulation fields using NCEP/NCAR reanalysis data.

Keywords

Centers of action (COA) Icelandic Low pressure Winter rainfall variability Indo-Pak Region 

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Copyright information

© Saudi Society for Geosciences 2011

Authors and Affiliations

  1. 1.Department of MathematicsUniversity of KarachiKarachiPakistan
  2. 2.Institute of Space and Planetary AstrophysicsUniversity of KarachiKarachiPakistan

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