| || || Kumar, Ravind|
| || || Climatological evidence of climate change in Fiji and impact of enso on regional climate|
Institution: University of the South Pacific.
Subject: Climatic changes -- Fiji -- Observations, Climatic changes -- Oceania -- Observations
Call No.: Pac QC 903 .2 .F5 K86 2014
Copyright:40-60% of this thesis may be copied without the authors written permission
Abstract: This thesis investigates trends in rainfall and air temperature in Fiji using historical climate records from 1900 to 2008. It introduces a new set of three climate zones for the SW Pacific region, and uses these in a preliminary analysis of the effects of ENSO events on temperature, rainfall and genesis of tropical cyclones across the region. This thesis analyses high quality data sets from Fiji that cover longer periods and a greater range of stations than in previous work. Data quality procedures and homogeneity test are applied to create homogenized datasets. There is high interannual variability but no significant long-term trend in annual rainfall in Fiji. There are no significant trends in ‘wet season’ and ‘dry season’ rainfall, considered separately. All except one of the stations analysed show a statistically significant trend in both maximum and minimum temperature, with increases ranging from 0.08 to 0.23oC per decade. This clear signal of climate change is consistent with that found in previous studies of temperatures in Fiji and other Pacific Islands. Trends in extreme values show an even stronger signal of climate change than that for mean temperatures. However, rainfall data from Fiji provides little evidence of long-term climate change. The results confirm that there is a significant influence of the El Niño Southern Oscillation on rainfall in Fiji, especially on the ‘dry’ side of the larger islands. However, it is found that there is limited influence detected from the interdecadal Pacific Oscillation (IPO) on decadal timescales.