A5025958241- Meteorological Phenomena and Simulations
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Atmospheric aerosols and clouds
- Environmental and Agricultural Sciences
- Wind and Air Flow Studies
- Remote Sensing and Land Use
- Ocean Waves and Remote Sensing
- Cryospheric studies and observations
- Precipitation Measurement and Analysis
- Environmental Changes in China
National Institute of Meteorology
2025
China Meteorological Administration
2022-2024
Abstract The nocturnal precipitation over the Sichuan Basin (SCB) exhibits obvious spatial variation, most of existing numerical research event SCB is based on case studies. In this study, long‐term climatological evaluation prediction diurnal spatio‐temporal evolution and relevant physical mechanism by 9 3 km operational weather model carried out. It found that SWC‐WARMS with grid spacing overestimates summer precipitation, especially western slopes SCB. northeastward timing delay peak well...
Abstract The distinct thermodynamic characteristics of the atmospheric boundary layer (ABL) over Tibetan Plateau (TP) significantly affect regional and global climate. It is well recognized that ABL depth western TP can exceed 4,000 m. However, energy mechanism its development less understood. In this study, three sites on was analyzed using intensive sounding observation data from Third Atmospheric Scientific Experiment. results showed surface sensible heat flux, entrainment energy, flux at...
In this paper, a typical vortex system based on quasi-linear thermal-dynamic equations to reflect the development and extinction of China Southwest Vortex is established using motion stability method combined with outer environmental field cumulus convective latent heat release. The in catastrophic weather systems are studied from aspects mechanisms for primary-stage Vortex, transition mechanism mature vortex, Vortex. results show following: (1) convergence divergence surrounding flow main...
On the basis of Prandtl boundary layer theory and an improved perturbation method, process laminar flow bifurcating into Southwest China vortex (SWV) in Hengduan Mountains is studied. The results show that formation SWV mainly determined by speed incoming airflow direction main axis Mountains. generated leeward area when greater than critical velocity. Moreover, it means bifurcates a vortex. position relative windward seasonal distribution SWVs both velocity to These findings are consistent...
In this study, we aimed to demonstrate the importance of diabatic heating in extreme rainstorm weather events induced by Southwest China vortex (SWCV) different precipitation regions with a similar circulation background. The results showed that atmospheric had indicative significance for intensity evolution SWCV and area. Changes preceded SWCV, region was consistent heavy region. variation mainly due positive contribution its vertical transport term. two types spatially non-uniform effects...
Based on the Boussinosq Approximation formulas in symmetric, cylindric coordinates, nonlinear effects of internal inertial gravity waves meso-micro scale convective activities Southwest China Vortex system are analyzed by multi-scale and perturbation approximation methods. The results obtain two main conclusions: (1) When atmospheric stratification is stable, for may also develop into finite-amplitude wave packet with a solitonic characteristics large amplitude short duration, forming...
Abstract Using automatic rainfall station and ERA5 reanalysis data, the Southwest China vortex (SWCV) processes that induce warm-sector rainstorms in Sichuan Basin were analyzed, their environmental field dynamic thermal characteristics researched through physical diagnosis synthesis, development mechanism was discussed. The results showed for caused by SWCV (SWCV-WR), general circulation backgrounds can could be divided into three types: upper trough-vortex (Type I), plateau shear line II),...
In this study, we investigate the variation of characteristics summer precipitation with different magnitudes and water vapor budget in key areas Sichuan-Tibet Railway by using daily data from meteorological stations monthly mean ERA-Interim reanalysis 1979 to 2018. The results show that heavy anomaly Brahmaputra valley mountain (BVM) area is generated multi-scale interactions between unique topography transports at low latitudes. When an intense anticyclonic circulation occurs over western...
In this study, the relationship between East Asian subtropical westerly jet (EASWJ) and summer monsoon (EASM) (westerly monsoon) correlation with atmospheric heat source (AHS) on Tibetan plateau (TP), especially possible connection of sudden enhancement in August were analyzed. The results show that there is a significant EASWJ EASM from June to October terms both intra-annual variability interannual fluctuations, AHS over TP during same period significantly enhanced August. synthetic...