Spatial and temporal variability of sea surface temperature of the Arabian sea over the past 142 years
2012
Haroon, M.A. (Pakistan Meteorological Dept., Islamabad (Pakistan)) | Afzal, M. (Pakistan Meteorological Dept., Islamabad (Pakistan))
The main emphasis of this study is to understand the variability of sea surface temperature over the Arabian Sea and its relationship with local and global climatic parameters. Monthly sea surface temperature (SST) data of Met Office Hadley Centre having resolution of 1 degree x 1 degree for the period from 1870 to 2011 is used. Principal component analysis (EOF) technique has been used to reveal the teleconnection of the regional sea surface temporal and spatial variability. The first four EOF modes cumulatively account for more than 90% of the total variance. Only first EOF mode explains 64% of the total variability and this mode is taken as a leading mode. Further analysis is carried out by comparing first temporal mode (PCI) of SST with local climatic indicators (Temperature & Precipitation) and global climatic indicators (ENSO & PDO).This investigation shows that SST (PCI) variation has a negative relation to both precipitation and temperature of Pakistan. A significant negative correlation is observed between SST (PCI) and Multivariate ENSO index (MEI) and no relationship is found between SST (PCI) and Pacific Decadal Oscillation (PDO).
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