Dynamics of precipitation climatology of the Southwest Pacific Region

Deo, Ravinesh Chand (2001) Dynamics of precipitation climatology of the Southwest Pacific Region. Research Masters thesis, University of Canterbury, Christchurch, New Zealand. (Unpublished)

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Abstract

An analysis of ten-year mean precipitation data from 1990 – 1999 is presented, that examines precipitation trends for the western Pacific region, bounded by 155˚ E – 135˚ W, 15˚ N – 30˚ S. Wind fields derived from the NCEP/NCAR reanalaysis data are presented for the same period of study to examine the nature of the airflow for study region. To investigate the possible impacts of convergence and divergence on precipitation distribution, surface and 200 hPa divergence fields are derived using the wind fields and correlated with the precipitation data. Correlation between mean monthly Southern Oscillation Index (SOI) and precipitation is also carried out.

The precipitation patterns reveal several features that are prominent during the monthly and seasonal time scales. There is a rise in precipitation during highly negative surface divergences and a fall during positive surface divergences on the spatial map. It has been shown that summer shows the highest negative correlation between precipitation and surface divergence while autumn shows the least at the 5% level of significance. Correlation between SOI and precipitation indicates that highly positive correlation between the two variables exist along the zone of South Pacific Convergence Zone (SPCZ).


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Item Type: Thesis (Non-Research) (Research Masters)
Item Status: Live Archive
Additional Information: This is a Master of Science thesis (research). The thesis was accepted for the award of a Master of Science at The University of Canterbury New Zealand in June 2001.
Faculty / Department / School: Historic - Faculty of Sciences - No Department
Supervisors: Heuff, Darlene; Sturman, Andrew
Date Deposited: 06 Feb 2013 02:16
Last Modified: 03 Jul 2013 00:57
Uncontrolled Keywords: precipitation dynamics in southwest Pacific, southern oscillation index
Fields of Research : 04 Earth Sciences > 0401 Atmospheric Sciences > 040102 Atmospheric Dynamics
Socio-Economic Objective: D Environment > 96 Environment > 9602 Atmosphere and Weather > 960202 Atmospheric Processes and Dynamics
URI: http://eprints.usq.edu.au/id/eprint/20370

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