Spatio -Temporal Assessments of Rainfall Variability and Trends in the Highlands to Coastal Regions of Papua New Guinea

The present study assesses spatio-temporal rainfall variability of the most highlands to coastal zones, comprising eight provinces, PNG. investigation was carried out over for a period 50 years starting from year 1968 2018. After testing and checking serial autocorrelation in data series, Mann-Kendal non-parametric statistical evaluation investigate trends variability. Sen’s method also used magnitude change millimeters (mm) per year. Furthermore, ArcGIS spatial analysis tools were calculation mean carry investigation. assessments on an annual seasonal basis within each designated zone. CRU TS 4.03 gridded 0.50 x resolution as input trend well station wise understand at specific location. From assessments, it found that higher is observed Eastern parts Morobe, Southern Highlands region central northern part Madang Province, while low Goroka, Western Simbu, Highlands, Jiwaka Enga province. investigation, more grid stations show increasing than decreasing trend. On significant SH province, significantly whole Madang, EH Simbu Province. overall that, there has been since up present.