Mesoscale modeling for the rapid movement of monsoonal isochrones

Abstract

AbstractThe progresses of fast moving 2013 monsoonal isochrones were simulated with WRF model at 25 km and compared with slower moving isochrones of 2014. A large number of sensitivity experiments were performed by enhancing of soil moisture, stratiform rain up to 25%, their combination and reducing soil temperature by 12%, over 5 grid points to the north of the isochrones over a relatively dry soil layer. The modified soil parameters and startiform rain ahead of isochrones enhances the population of the buoyant elements, divergent flows of the local Hadley circulation normal to the isochrones; resulting in a fast movement of the isochrones.