Abstract. Himawari-8 is a next-generation geostationary meteorological satellite launched by the Japan Meteorological Agency. It carries Advanced Himawari Imager (AHI) on board, which can continuously monitor high-impact weather events with high frequency in space and time. The assimilation of AHI radiance data was implemented three-dimensional variational system (3DVAR) Weather Research Foreca...

Assimilation of mesoscale observations, such as AWS, GPSPW, etc., and initialization of the high resolution (3km or less) model with the 3DVar approach are still challenge problems. To improve the weather forecast over the Beijing area for the 2008 Olympic game, a 3 nests (27/9/3-km) WRFVar/WRF system with 3-h update cycle is established. The background error statistics (BES) files for each nes...

Based on ground-based Doppler radar data with high spatial and temporal resolution, our study focuses rapid intensification (RI) of a sheared tropical cyclone (TC). The asymmetric inner-core structure its impact RI are presented using the Advanced Regional Prediction System-3DVAR. time evolution TC characteristics shows that Meranti experiences two stages RI: dominant period axisymmetric period...

The Qinghai–Tibet Plateau (QTP) is a crucial component of the global climate system, influencing regional and through complex thermal dynamic mechanisms. high-altitude region, which largest part extra-polar cryosphere, encompasses extensive mountain glaciers, permafrost, seasonally frozen land, making it highly sensitive to change. However, challenging environmental conditions, such as harsh te...

Present work elucidates the impact of 3DVAR data assimilation technique for simulation one heavy rainfall events reported over Kotdwara region in North-West Himalayan (NWH) on 4th August 2017. We have examined conventional and satellite-based radiance datasets simulated results with without assimilating observations into Weather Research Forecasting (WRF) model. Three experiments been designed ...

Abstract. The ability of two downscaling experiments to correctly simulate thermodynamic conditions over the Iberian Peninsula (IP) is compared in this paper. To do so, three parameters used evaluate unstable atmosphere are evaluated: total totals index (TT), convective available potential energy (CAPE), and inhibition (CIN). Weather Research Forecasting (WRF) model for simulations. N experimen...