The Balearic Islands, as well as other Mediterranean regions, are occasionally affected by heavy rain events, which can produce numerous damages. This study contributes to improve the understanding of the dynamical mechanisms that produce heavy rain events by means of a classification of their related atmospheric patterns. Heavy rainfall dataset for the Balearic Islands and some gridded atmosph...

During the early summer rainy season over Taiwan, three types of low-level jets are observed, including a synoptic jet (SLLJ) situated in 850–700 hPa layer frontal zone, marine boundary (MBLJ) embedded within southwesterly monsoon flow northern South China Sea at approximately 925 level, and an orographically induced 1 km level off northwestern Taiwan coast (e.g., barrier (BJ)). The characteris...

It has been revealed that the vertical wind shear (VWS) can result in rainfall asymmetry of tropical cyclone (TC), where VWS is conventionally defined as environmental horizontal winds between 200- and 850-hPa levels within a certain area from TC centre. The maximum generally displaced downshear to downshear-left side Northern Hemisphere or downshear-right Southern Hemisphere. Here, we revisit ...

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract Atmosphere and Ocean General Circulation Model (AOGCM) experiments for the Intergovernmental Panel on Climate Change Fourth Assessment Report are analyzed using both 2...

The last decade has seen frequent occurrences of severe air pollution episodes of high loading in SO2 during winters in the North China Plain (NCP). Using satellite data from the Ozone Monitoring Instrument (OMI), chemistry transport model (GEOS-Chem) simulations, and National Center for Environmental Predication (NCEP) meteorological reanalysis, this study examines meteorological and synoptic ...

The first global climatology of monsoon low-pressure systems is presented here, based on the ERA-Interim reanalysis. Low-pressure systems are classified into three intensity categories and particular focus is given to systems in the category corresponding to a traditional definition of monsoon depressions. Vortex tracks are identified using an automated algorithm applied to the distributions of...

The Canadian Middle Atmosphere Model is used to examine the sensitivity of simulated climate to conservation of momentum in gravity wave drag parameterization. Momentum conservation requires that the parameterized gravity wave momentum flux at the top of the model be zero and corresponds to the physical boundary condition of no momentum flux at the top of the atmosphere. Allowing momentum flux ...

abstractâ iran country due to laying in the desert belt on the northern hemisphere, are dry and desert climate of many parts of it predominate. due to the same location in the atmospheric loss of human life and animal life and it has an important role. and according to the moisture sources in the country and located outside of the atmospheric loss from year to year fluctuations have other roles...