Introduction The anatomy of the posterior circulation is very complex and variable. The basilar artery which forms the spine of posterior cerebral circulation usually terminates by dividing into two posterior cerebral arteries [1]. Basilar termination is the most frequent site of aneurysm [2]. The variations may also alter the relationships with and compress oculomotor nerve [3]. There are, how...

5 We examine the key characteristics of the boreal winter extratropical circulation changes in 6 response to anthropogenic aerosols, simulated with a coupled atmosphere-slab ocean general 7 circulation model. The zonal-mean response features a pronounced equatorward shift of 8 the Northern Hemisphere subtropical jet owing to the mid-latitude aerosol cooling. The 9 circulation changes also show ...

The authors examine the key characteristics of the boreal winter extratropical circulation changes in response to anthropogenic aerosols, simulated with a coupled atmosphere–slab ocean general circulation model. The zonal-mean response features a pronounced equatorward shift of the Northern Hemisphere subtropical jet owing to the midlatitude aerosol cooling. The circulation changes also show st...

What triggers Maud Rise polynya, a large opening in the winter Antarctic sea ice, is still debated. We show that upcoming of all polynyas can be detected early up to four months ahead, especially since 2002 expansion satellite observations. In polynya years, continuous anomalous ice thinning begins May, caused by atmospheric and oceanic forcings. Dynamically, an cyclonic circulation atmosphere ...

based on spi and rdi indices, changes in droughts in the semi-arid areas of west golestan province was assessed in the gis environment by incorporating data from hashemabad synoptic station and 11 climatic stations. after evaluating the ability of lars-wg5 in the simulation period (1984-2010), downscaling of hadcm3, ipcm, and gfc models was done as a group under scenarios of a1b, a2 and b1 to e...

5 A high resolution cloud resolving model (CRM) simulation is developed here for a two6 dimensional Walker circulation over a planetary scale domain of 40000 km for an extended 7 period of several hundred days. The Walker cell emerges as the time averaged statistical 8 steady state with a prescribed sinusoidal sea surface temperature (SST) pattern with mean 9 temperature of 301.15 K and horizon...

The internal flow circulation dynamics of a liquid drop moving in a co- or counter-flowing gas stream has been numerically studied. The present work is concerned with the time accurate numerical solution of the two phase flow field at the low Mach number limit with an appropriate volume tracking method to capture motion and deformation of a liquid drop. It is shown that relative velocity betwee...

Because of their tiny size, they can get deep into the lungs and, once in the bloodstream, may be able to cross the blood-brain barrier. Particles deposited in the nasal region may be able to enter the brain by translocation along the olfactory nerve. Particles, especially composites, may be able to penetrate the skin, and even some protective equipment. The smaller the particle, the more likel...

Submarine measurements of sea ice draft show that the ice has thinned in some parts of the Arctic Ocean at a remarkably high rate over the past few decades. The spatial pattern indicates that the thinning was a strong function of ice thickness, with the greatest thinning occurring where the ice was thickest initially. A similar relationship between sea ice thinning and the initial thickness is ...

Based on the daily precipitation data from 53 meteorological stations, 11 extreme precipitation indices were selected, categorized and calculated; the temporal and spatial patterns in these indices and their teleconnections with the large-scale circulations were analyzed by the non-parametric Mann-Kendall test; and Sen’s slope estimator and linear regression for the period of 1960–2014 were cal...