This paper presents results of a comprehensive study of relationship between the movement of tropical cyclones and the large-scale circulation which surrounds them.
The geostrophic system of equations with both the effects of orography and heat contrast corresponding to land-sea distribution is integrated with respect to time by using the spectral method. The computed results show the appearance of reasonable blocking situation and a corresponding double jet stream in the latitudinal distribution of the zonally averaged zonal wind.
A new theoretical study of the migrating diurnal thermal tide was carried out using classical tidal theory and placing particular empahsis upon the response in the tropical troposphere.
"Surface wind data from 20 Prototype Regional Observing and Forecasting Service (PROFS) surface mesonetwork stations have been analyzed for the month of July 1981 to determine characteristic flow patterns over northeast Colorado. Streamline analyses of the surface flow over this region have been prepared on an hourly basis."
Recent observational studies of upper-tropospheric and lower-stratospheric winds atop mesoscale convective systems show the development of anticyclonic outflow....As the magnitude of the anticyclone increases, the inertial stability of the system is reduced, resulting in a decreased partitioning of the initial available potential energy to the balanced state of the system.
A linear theory is given for the case of steady thermal convection in a stratified fluid with a general thermal boundary condition at the upper and lower limits of the system. The theory is applied to a number of fluid systems and the results are discussed in terms of the Rayleigh number, the horizontal wave number and the vertical velocity and temperature perturbation profiles in the vertical.
Satellite photographs during the summer months frequently reveal a weather situation in which strong convective development is observed over the Rocky Mountains and several hundred kilometers to the east of the mountains, while the region immediately to the lee is essentially cloud free. It is proposed that an orographically induced mesoscale wave phenomenon may produce this situation.
In this study, the RAMS@CSU cloud-resolving mesoscale forecast model is run in a real-time configuration with a sophisticated microphysical package and multiple nested grids, in which the smallest grid has increased vertical resolution in the lower boundary layer. Using this configuration, two specific fog events are simulated in 3-D using initialization data with a horizontal resolution of 40 km.
The erosion and subsequent mixing to the environment of the updraft of mesoscale convective clouds is examined and modeled as a mechanism for the thermal modification of the cloud environment.
This paper provides a description of the Colorado State University (CSU) instrumentation and data collected during the Marine Stratocumulus Intensive Field Observations (MStCu IFO) of the first ISCCP (International Satellite Cloud Climate Program) Regional Experiment (FIRE).
The development of a mesoscale circulation by the thermal contrast between a fire burned area surrounded by untouched vegetation was simulated by the Regional Atmospheric Modeling System (RAMS) in order to show the circulation's ability to generate clouds and precipitation.
