نتایج جستجو برای: circulations
تعداد نتایج: 2541 فیلتر نتایج به سال:
We investigate the response of convection to idealized pertur-4 bations in the thermodynamic environment in simulations which parame-5 terize the large scale circulations using the weak temperature gradient (WTG) 6 approximation. The perturbations include a combination of modifying the 7 environmental moisture and atmospheric stability via imposing anomalies 8 in reference moisture and temperat...
The clinical features and the location and severity of obstructive coronary artery disease are contrasted in 98 patients with predominant left and 99 patients with predominant right coronary circulations. A significantly higher incidence of ventricular conduction disturbances and a greater incidence and severity of obstructive coronary artery disease (greater than or equal to 70% cross-sectiona...
We examined changes in several independent intensity indices of four major tropical monsoonal circulations for the period 1950–1998. These intensity indices included observed land surface precipitation and observed ocean surface pressure in the monsoon regions as well as upperlevel divergence calculated at several standard levels from the NCAR/NCEP reanalysis. These values were averaged seasona...
Pulmonary vascular malformation is an unusual cause of hemoptysis. These abnormal vascular communications between pulmonary circulations or between pulmonary and systemic circulations can result in significant dyspnea, hemoptysis and hypoxemia. Pulmonary vascular malformations can take various forms. Here we present a case of an abnormal collection of thrombosed arteries and veins, without the ...
In addition to the mean meridional Hadley circulation, there also exist zonal overturning circulations that contribute to the meteorology and climatology of the tropics. Together, these overturning circulations are commonly referred to as the Walker circulation. In this section, we first explore the history and basic structure of the Walker circulation. Later, we reintroduce the shallow water e...
The role of asymmetries (large-scde horizontal eddies) in satisfying the mean angular momentum budget for the steady-state hurricane is studied by computing transverse circulations for a prescribed tangential vortex on the scale of 1000 km. For realistic diabatic heating rates at large distances from the hurricane center, the correlation between radial velocity and absolute vorticity must be ne...
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