Understanding Large Asian Summer Monsoon

Abstract

The Asian Summer Monsoon (ASM) framework rules the precipitation design over the entire Asian region, affecting almost 33% of the total populace. This major system refers to the Western North Pacific, East Asian, and Indian summer monsoons (WNPSM, EASM, and ISM), which regulate weather from mid-spring to mid-autumn at different times depending on the location. This study contemplates delving into the spatial connections of precipitation in the Asian region using contemporary amelioration in network theory. We explore the spatial connection(s) of precipitation over the Asian continent among the Asian Summer Monsoon sub-branches. For point processes like precipitation, the investigation is consummated using complex network tools and a linear correlation measure. Using degree and clustering coefficient, we investigated the geospatial linkages in the precipitation network athwart Asia. The clustering coefficient connotes the sectional density, whereas the degree is an indicator of association(s). The clustering coefficient results to aid in identifying actual network neighbors and links and areas with maximum and minimum interconnection. This study uses PERSIANN-CDR monthly rainfall data from January 1983 to March 2020 (38 years) with geographic coverage from the Equator to 50°N and 50°E to 180°E at a resolution of 0.5° x 0.5°. The spatial distribution plot of degree and clustering coefficient for different CT is analyzed. While considering 1% extreme events, the degree plot for absolute and positive correlation reveals that the majority of the connections are lying in the vicinity of BOB and northern China. When negative correlations are visualized, majority of nodes with significant connections lie in the NW Pakistan Afghanistan region.